diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..30686018
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,14 @@
+.class
+.classpath
+.project
+build
+bin
+.bak
+.settings
+Thumbs.db
+.DS_Store
+._.DS_Store
+logs
+target
+*.iml
+.idea
diff --git a/Chapter1/pom.xml b/1.x/Chapter1/pom.xml
similarity index 100%
rename from Chapter1/pom.xml
rename to 1.x/Chapter1/pom.xml
diff --git a/Chapter1/src/main/java/com/didispace/Chapter1Application.java b/1.x/Chapter1/src/main/java/com/didispace/Chapter1Application.java
similarity index 100%
rename from Chapter1/src/main/java/com/didispace/Chapter1Application.java
rename to 1.x/Chapter1/src/main/java/com/didispace/Chapter1Application.java
diff --git a/Chapter1/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter1/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter1/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter1/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter1/src/main/resources/application.properties b/1.x/Chapter1/src/main/resources/application.properties
similarity index 100%
rename from Chapter1/src/main/resources/application.properties
rename to 1.x/Chapter1/src/main/resources/application.properties
diff --git a/Chapter1/src/test/java/com/didispace/Chapter1ApplicationTests.java b/1.x/Chapter1/src/test/java/com/didispace/Chapter1ApplicationTests.java
similarity index 100%
rename from Chapter1/src/test/java/com/didispace/Chapter1ApplicationTests.java
rename to 1.x/Chapter1/src/test/java/com/didispace/Chapter1ApplicationTests.java
diff --git a/Chapter2-1-1/pom.xml b/1.x/Chapter2-1-1/pom.xml
similarity index 100%
rename from Chapter2-1-1/pom.xml
rename to 1.x/Chapter2-1-1/pom.xml
diff --git a/Chapter2-1-1/src/main/java/com/didispace/Application.java b/1.x/Chapter2-1-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter2-1-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter2-1-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter2-1-1/src/main/java/com/didispace/service/BlogProperties.java b/1.x/Chapter2-1-1/src/main/java/com/didispace/service/BlogProperties.java
similarity index 100%
rename from Chapter2-1-1/src/main/java/com/didispace/service/BlogProperties.java
rename to 1.x/Chapter2-1-1/src/main/java/com/didispace/service/BlogProperties.java
diff --git a/Chapter2-1-1/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter2-1-1/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter2-1-1/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter2-1-1/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter2-1-1/src/main/resources/application-dev.properties b/1.x/Chapter2-1-1/src/main/resources/application-dev.properties
similarity index 100%
rename from Chapter2-1-1/src/main/resources/application-dev.properties
rename to 1.x/Chapter2-1-1/src/main/resources/application-dev.properties
diff --git a/Chapter2-1-1/src/main/resources/application-prod.properties b/1.x/Chapter2-1-1/src/main/resources/application-prod.properties
similarity index 100%
rename from Chapter2-1-1/src/main/resources/application-prod.properties
rename to 1.x/Chapter2-1-1/src/main/resources/application-prod.properties
diff --git a/Chapter2-1-1/src/main/resources/application-test.properties b/1.x/Chapter2-1-1/src/main/resources/application-test.properties
similarity index 100%
rename from Chapter2-1-1/src/main/resources/application-test.properties
rename to 1.x/Chapter2-1-1/src/main/resources/application-test.properties
diff --git a/Chapter2-1-1/src/main/resources/application.properties b/1.x/Chapter2-1-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter2-1-1/src/main/resources/application.properties
rename to 1.x/Chapter2-1-1/src/main/resources/application.properties
diff --git a/Chapter2-1-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter2-1-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter2-1-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter2-1-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/1.x/Chapter2-1-2/pom.xml b/1.x/Chapter2-1-2/pom.xml
new file mode 100644
index 00000000..f869ccfc
--- /dev/null
+++ b/1.x/Chapter2-1-2/pom.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>Chapter2-1-2</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Chapter2-1-2</name>
+    <description>Spring Boot 2.0 features : Application Events and Listeners</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.0.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/Application.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/Application.java
new file mode 100755
index 00000000..bcfd43a8
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/Application.java
@@ -0,0 +1,31 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@Slf4j
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    public DataLoader dataLoader() {
+        return new DataLoader();
+    }
+
+    @Slf4j
+    static class DataLoader implements CommandLineRunner {
+
+        @Override
+        public void run(String... strings) throws Exception {
+            log.info("Loading data...");
+        }
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationEnvironmentPreparedEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationEnvironmentPreparedEventListener.java
new file mode 100644
index 00000000..da2a47cb
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationEnvironmentPreparedEventListener.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationEnvironmentPreparedEventListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
+        log.info("......ApplicationEnvironmentPreparedEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationFailedEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationFailedEventListener.java
new file mode 100644
index 00000000..457ff47f
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationFailedEventListener.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationFailedEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationFailedEventListener implements ApplicationListener<ApplicationFailedEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationFailedEvent event) {
+        log.info("......ApplicationFailedEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationPreparedEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationPreparedEventListener.java
new file mode 100644
index 00000000..5b529617
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationPreparedEventListener.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationPreparedEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationPreparedEventListener implements ApplicationListener<ApplicationPreparedEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationPreparedEvent event) {
+        log.info("......ApplicationPreparedEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationReadyEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationReadyEventListener.java
new file mode 100644
index 00000000..9193a750
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationReadyEventListener.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationReadyEventListener implements ApplicationListener<ApplicationReadyEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationReadyEvent event) {
+        log.info("......ApplicationReadyEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartedEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartedEventListener.java
new file mode 100644
index 00000000..3b47eba6
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartedEventListener.java
@@ -0,0 +1,16 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.event.ApplicationStartedEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationStartedEventListener implements ApplicationListener<ApplicationStartedEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationStartedEvent event) {
+        log.info("......ApplicationStartedEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartingEventListener.java b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartingEventListener.java
new file mode 100644
index 00000000..effcb14f
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/java/com/didispace/ApplicationStartingEventListener.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationStartingEvent;
+import org.springframework.context.ApplicationListener;
+
+@Slf4j
+public class ApplicationStartingEventListener implements ApplicationListener<ApplicationStartingEvent> {
+
+    @Override
+    public void onApplicationEvent(ApplicationStartingEvent event) {
+        log.info("......ApplicationStartingEvent......");
+    }
+
+}
diff --git a/1.x/Chapter2-1-2/src/main/resources/META-INF/spring.factories b/1.x/Chapter2-1-2/src/main/resources/META-INF/spring.factories
new file mode 100644
index 00000000..15177da6
--- /dev/null
+++ b/1.x/Chapter2-1-2/src/main/resources/META-INF/spring.factories
@@ -0,0 +1,6 @@
+org.springframework.context.ApplicationListener=com.didispace.ApplicationEnvironmentPreparedEventListener,\
+  com.didispace.ApplicationFailedEventListener,\
+  com.didispace.ApplicationPreparedEventListener,\
+  com.didispace.ApplicationReadyEventListener,\
+  com.didispace.ApplicationStartedEventListener,\
+  com.didispace.ApplicationStartingEventListener
\ No newline at end of file
diff --git a/Chapter3-1-1/src/main/resources/application.properties b/1.x/Chapter2-1-2/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-1/src/main/resources/application.properties
rename to 1.x/Chapter2-1-2/src/main/resources/application.properties
diff --git a/1.x/Chapter2-2-1/pom.xml b/1.x/Chapter2-2-1/pom.xml
new file mode 100644
index 00000000..c7eddd26
--- /dev/null
+++ b/1.x/Chapter2-2-1/pom.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>Chapter2-2-1</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter2-2-1</name>
+	<description>Spring Boot 2 : Relaxed Binding</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.0.0.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.16.20</version>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter2-2-1/src/main/java/com/didispace/Application.java b/1.x/Chapter2-2-1/src/main/java/com/didispace/Application.java
new file mode 100755
index 00000000..f06a4a25
--- /dev/null
+++ b/1.x/Chapter2-2-1/src/main/java/com/didispace/Application.java
@@ -0,0 +1,44 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.ConfigurationPropertiesBinding;
+import org.springframework.boot.context.properties.bind.Bindable;
+import org.springframework.boot.context.properties.bind.Binder;
+import org.springframework.context.ApplicationContext;
+
+import java.util.List;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		ApplicationContext context = SpringApplication.run(Application.class, args);
+
+		Binder binder = Binder.get(context.getEnvironment());
+
+		// 绑定简单配置
+		FooProperties foo = binder.bind("com.didispace", Bindable.of(FooProperties.class)).get();
+		System.out.println(foo.getFoo());
+
+		// 绑定List配置
+		List<String> post = binder.bind("com.didispace.post", Bindable.listOf(String.class)).get();
+		System.out.println(post);
+
+		List<PostInfo> posts = binder.bind("com.didispace.posts", Bindable.listOf(PostInfo.class)).get();
+		System.out.println(posts);
+
+		// 读取配置
+		System.out.println(context.getEnvironment().containsProperty("com.didispace.database-platform"));
+		System.out.println(context.getEnvironment().containsProperty("com.didispace.databasePlatform"));
+
+	}
+
+}
diff --git a/1.x/Chapter2-2-1/src/main/java/com/didispace/FooProperties.java b/1.x/Chapter2-2-1/src/main/java/com/didispace/FooProperties.java
new file mode 100644
index 00000000..9fdf6e22
--- /dev/null
+++ b/1.x/Chapter2-2-1/src/main/java/com/didispace/FooProperties.java
@@ -0,0 +1,14 @@
+package com.didispace;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@Data
+@ConfigurationProperties(prefix = "com.didispace")
+public class FooProperties {
+
+    private String foo;
+
+    private String databasePlatform;
+
+}
\ No newline at end of file
diff --git a/1.x/Chapter2-2-1/src/main/java/com/didispace/PostInfo.java b/1.x/Chapter2-2-1/src/main/java/com/didispace/PostInfo.java
new file mode 100644
index 00000000..6df554fe
--- /dev/null
+++ b/1.x/Chapter2-2-1/src/main/java/com/didispace/PostInfo.java
@@ -0,0 +1,13 @@
+package com.didispace;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@Data
+@ConfigurationProperties
+public class PostInfo {
+
+    private String title;
+    private String content;
+
+}
diff --git a/1.x/Chapter2-2-1/src/main/resources/application.properties b/1.x/Chapter2-2-1/src/main/resources/application.properties
new file mode 100755
index 00000000..df1d5f5a
--- /dev/null
+++ b/1.x/Chapter2-2-1/src/main/resources/application.properties
@@ -0,0 +1,10 @@
+com.didispace.foo=bar
+com.didispace.database-platform=sql
+
+com.didispace.post[0]=Why Spring Boot
+com.didispace.post[1]=Why Spring Cloud
+
+com.didispace.posts[0].title=Why Spring Boot
+com.didispace.posts[0].content=It is perfect!
+com.didispace.posts[1].title=Why Spring Cloud
+com.didispace.posts[1].content=It is perfect too!
diff --git a/Chapter3-1-1/pom.xml b/1.x/Chapter3-1-1/pom.xml
similarity index 100%
rename from Chapter3-1-1/pom.xml
rename to 1.x/Chapter3-1-1/pom.xml
diff --git a/Chapter3-1-1/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-1/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-1-1/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-1-1/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-1-1/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-1-1/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-1/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-1/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-1/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter3-1-1/src/main/java/com/didispace/web/UserController.java b/1.x/Chapter3-1-1/src/main/java/com/didispace/web/UserController.java
similarity index 100%
rename from Chapter3-1-1/src/main/java/com/didispace/web/UserController.java
rename to 1.x/Chapter3-1-1/src/main/java/com/didispace/web/UserController.java
diff --git a/Chapter3-1-2/src/main/resources/application.properties b/1.x/Chapter3-1-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-2/src/main/resources/application.properties
rename to 1.x/Chapter3-1-1/src/main/resources/application.properties
diff --git a/Chapter3-1-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-1-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-1-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-1-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-1-2/pom.xml b/1.x/Chapter3-1-2/pom.xml
similarity index 100%
rename from Chapter3-1-2/pom.xml
rename to 1.x/Chapter3-1-2/pom.xml
diff --git a/Chapter3-1-2/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-2/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-2/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-2/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter3-1-3/src/main/resources/application.properties b/1.x/Chapter3-1-2/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-3/src/main/resources/application.properties
rename to 1.x/Chapter3-1-2/src/main/resources/application.properties
diff --git a/Chapter3-1-2/src/main/resources/templates/index.html b/1.x/Chapter3-1-2/src/main/resources/templates/index.html
similarity index 100%
rename from Chapter3-1-2/src/main/resources/templates/index.html
rename to 1.x/Chapter3-1-2/src/main/resources/templates/index.html
diff --git a/Chapter3-1-2/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-1-2/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-1-2/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-1-2/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-1-3/pom.xml b/1.x/Chapter3-1-3/pom.xml
similarity index 100%
rename from Chapter3-1-3/pom.xml
rename to 1.x/Chapter3-1-3/pom.xml
diff --git a/Chapter3-1-3/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-3/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-3/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-3/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-3/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-3/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-3/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-3/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter3-1-4/src/main/resources/application.properties b/1.x/Chapter3-1-3/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-4/src/main/resources/application.properties
rename to 1.x/Chapter3-1-3/src/main/resources/application.properties
diff --git a/Chapter3-1-3/src/main/resources/templates/index.ftl b/1.x/Chapter3-1-3/src/main/resources/templates/index.ftl
similarity index 100%
rename from Chapter3-1-3/src/main/resources/templates/index.ftl
rename to 1.x/Chapter3-1-3/src/main/resources/templates/index.ftl
diff --git a/Chapter3-1-3/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-1-3/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-1-3/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-1-3/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-1-4/pom.xml b/1.x/Chapter3-1-4/pom.xml
similarity index 100%
rename from Chapter3-1-4/pom.xml
rename to 1.x/Chapter3-1-4/pom.xml
diff --git a/Chapter3-1-4/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-4/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-4/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-4/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-4/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-4/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-4/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-4/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter3-1-5/src/main/resources/application.properties b/1.x/Chapter3-1-4/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-5/src/main/resources/application.properties
rename to 1.x/Chapter3-1-4/src/main/resources/application.properties
diff --git a/Chapter3-1-4/src/main/resources/templates/index.vm b/1.x/Chapter3-1-4/src/main/resources/templates/index.vm
similarity index 100%
rename from Chapter3-1-4/src/main/resources/templates/index.vm
rename to 1.x/Chapter3-1-4/src/main/resources/templates/index.vm
diff --git a/Chapter3-1-4/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-1-4/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-1-4/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-1-4/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-1-5/pom.xml b/1.x/Chapter3-1-5/pom.xml
similarity index 100%
rename from Chapter3-1-5/pom.xml
rename to 1.x/Chapter3-1-5/pom.xml
diff --git a/Chapter3-1-5/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-5/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-5/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-5/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-5/src/main/java/com/didispace/Swagger2.java b/1.x/Chapter3-1-5/src/main/java/com/didispace/Swagger2.java
similarity index 100%
rename from Chapter3-1-5/src/main/java/com/didispace/Swagger2.java
rename to 1.x/Chapter3-1-5/src/main/java/com/didispace/Swagger2.java
diff --git a/Chapter3-1-5/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-1-5/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-1-5/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-1-5/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-1-5/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-5/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-5/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-5/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter3-1-5/src/main/java/com/didispace/web/UserController.java b/1.x/Chapter3-1-5/src/main/java/com/didispace/web/UserController.java
similarity index 94%
rename from Chapter3-1-5/src/main/java/com/didispace/web/UserController.java
rename to 1.x/Chapter3-1-5/src/main/java/com/didispace/web/UserController.java
index 1a504faf..3363bfd9 100755
--- a/Chapter3-1-5/src/main/java/com/didispace/web/UserController.java
+++ b/1.x/Chapter3-1-5/src/main/java/com/didispace/web/UserController.java
@@ -36,7 +36,7 @@ public String postUser(@RequestBody User user) {
     }
 
     @ApiOperation(value="获取用户详细信息", notes="根据url的id来获取用户详细信息")
-    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")
+    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path")
     @RequestMapping(value="/{id}", method=RequestMethod.GET)
     public User getUser(@PathVariable Long id) {
         return users.get(id);
@@ -44,7 +44,7 @@ public User getUser(@PathVariable Long id) {
 
     @ApiOperation(value="更新用户详细信息", notes="根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
     @ApiImplicitParams({
-            @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long"),
+            @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path"),
             @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User")
     })
     @RequestMapping(value="/{id}", method=RequestMethod.PUT)
@@ -57,7 +57,7 @@ public String putUser(@PathVariable Long id, @RequestBody User user) {
     }
 
     @ApiOperation(value="删除用户", notes="根据url的id来指定删除对象")
-    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")
+    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path")
     @RequestMapping(value="/{id}", method=RequestMethod.DELETE)
     public String deleteUser(@PathVariable Long id) {
         users.remove(id);
diff --git a/Chapter3-1-6/src/main/resources/application.properties b/1.x/Chapter3-1-5/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-1-6/src/main/resources/application.properties
rename to 1.x/Chapter3-1-5/src/main/resources/application.properties
diff --git a/Chapter3-1-6/pom.xml b/1.x/Chapter3-1-6/pom.xml
similarity index 100%
rename from Chapter3-1-6/pom.xml
rename to 1.x/Chapter3-1-6/pom.xml
diff --git a/Chapter3-1-6/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-6/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-1-6/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-1-6/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-1-6/src/main/java/com/didispace/dto/ErrorInfo.java b/1.x/Chapter3-1-6/src/main/java/com/didispace/dto/ErrorInfo.java
similarity index 100%
rename from Chapter3-1-6/src/main/java/com/didispace/dto/ErrorInfo.java
rename to 1.x/Chapter3-1-6/src/main/java/com/didispace/dto/ErrorInfo.java
diff --git a/Chapter3-1-6/src/main/java/com/didispace/exception/GlobalExceptionHandler.java b/1.x/Chapter3-1-6/src/main/java/com/didispace/exception/GlobalExceptionHandler.java
similarity index 100%
rename from Chapter3-1-6/src/main/java/com/didispace/exception/GlobalExceptionHandler.java
rename to 1.x/Chapter3-1-6/src/main/java/com/didispace/exception/GlobalExceptionHandler.java
diff --git a/Chapter3-1-6/src/main/java/com/didispace/exception/MyException.java b/1.x/Chapter3-1-6/src/main/java/com/didispace/exception/MyException.java
similarity index 100%
rename from Chapter3-1-6/src/main/java/com/didispace/exception/MyException.java
rename to 1.x/Chapter3-1-6/src/main/java/com/didispace/exception/MyException.java
diff --git a/Chapter3-1-6/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter3-1-6/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter3-1-6/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter3-1-6/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter4-1-1/src/main/resources/application.properties b/1.x/Chapter3-1-6/src/main/resources/application.properties
old mode 100644
new mode 100755
similarity index 100%
rename from Chapter4-1-1/src/main/resources/application.properties
rename to 1.x/Chapter3-1-6/src/main/resources/application.properties
diff --git a/Chapter3-1-6/src/main/resources/templates/error.html b/1.x/Chapter3-1-6/src/main/resources/templates/error.html
similarity index 100%
rename from Chapter3-1-6/src/main/resources/templates/error.html
rename to 1.x/Chapter3-1-6/src/main/resources/templates/error.html
diff --git a/Chapter3-1-6/src/main/resources/templates/index.html b/1.x/Chapter3-1-6/src/main/resources/templates/index.html
similarity index 100%
rename from Chapter3-1-6/src/main/resources/templates/index.html
rename to 1.x/Chapter3-1-6/src/main/resources/templates/index.html
diff --git a/Chapter3-1-6/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-1-6/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-1-6/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-1-6/src/test/java/com/didispace/ApplicationTests.java
diff --git a/1.x/Chapter3-1-7/pom.xml b/1.x/Chapter3-1-7/pom.xml
new file mode 100644
index 00000000..660637b3
--- /dev/null
+++ b/1.x/Chapter3-1-7/pom.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>Chapter3-1-7</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter3-1-7</name>
+	<description>Spring Boot</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.5.10.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.datatype</groupId>
+			<artifactId>jackson-datatype-jsr310</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.16.20</version>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<fork>true</fork>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter3-1-7/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-7/src/main/java/com/didispace/Application.java
new file mode 100755
index 00000000..7ac57d25
--- /dev/null
+++ b/1.x/Chapter3-1-7/src/main/java/com/didispace/Application.java
@@ -0,0 +1,58 @@
+package com.didispace;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.LocalDate;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @RestController
+    class HelloController {
+
+        @PostMapping("/user")
+        public UserDto user(@RequestBody UserDto userDto) throws Exception {
+            return userDto;
+        }
+
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    static class UserDto {
+
+        private String userName;
+        private LocalDate birthday;
+
+    }
+
+    @Bean
+    public ObjectMapper serializingObjectMapper() {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+        objectMapper.registerModule(new JavaTimeModule());
+        return objectMapper;
+    }
+
+}
diff --git a/Chapter4-1-2/src/main/resources/application.properties b/1.x/Chapter3-1-7/src/main/resources/application.properties
old mode 100644
new mode 100755
similarity index 100%
rename from Chapter4-1-2/src/main/resources/application.properties
rename to 1.x/Chapter3-1-7/src/main/resources/application.properties
diff --git a/1.x/Chapter3-1-8/pom.xml b/1.x/Chapter3-1-8/pom.xml
new file mode 100644
index 00000000..f20ce9a1
--- /dev/null
+++ b/1.x/Chapter3-1-8/pom.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>Chapter3-1-8</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.5.10.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.dataformat</groupId>
+			<artifactId>jackson-dataformat-xml</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter3-1-8/src/main/java/com/didispace/Application.java b/1.x/Chapter3-1-8/src/main/java/com/didispace/Application.java
new file mode 100755
index 00000000..a20de910
--- /dev/null
+++ b/1.x/Chapter3-1-8/src/main/java/com/didispace/Application.java
@@ -0,0 +1,18 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}
diff --git a/1.x/Chapter3-1-8/src/main/java/com/didispace/web/User.java b/1.x/Chapter3-1-8/src/main/java/com/didispace/web/User.java
new file mode 100755
index 00000000..2ff2af3d
--- /dev/null
+++ b/1.x/Chapter3-1-8/src/main/java/com/didispace/web/User.java
@@ -0,0 +1,26 @@
+package com.didispace.web;
+
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@JacksonXmlRootElement(localName = "User")
+public class User {
+
+    @JacksonXmlProperty(localName = "name")
+    private String name;
+    @JacksonXmlProperty(localName = "age")
+    private Integer age;
+
+}
diff --git a/1.x/Chapter3-1-8/src/main/java/com/didispace/web/UserController.java b/1.x/Chapter3-1-8/src/main/java/com/didispace/web/UserController.java
new file mode 100755
index 00000000..2b26f6e2
--- /dev/null
+++ b/1.x/Chapter3-1-8/src/main/java/com/didispace/web/UserController.java
@@ -0,0 +1,25 @@
+package com.didispace.web;
+
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@Controller
+public class UserController {
+
+    @PostMapping(value = "/user", consumes = MediaType.APPLICATION_XML_VALUE, produces = MediaType.APPLICATION_XML_VALUE)
+    @ResponseBody
+    public User create(@RequestBody User user) {
+        user.setName("didispace.com : " + user.getName());
+        user.setAge(user.getAge() + 100);
+        return user;
+    }
+
+}
\ No newline at end of file
diff --git a/Chapter4-2-2/src/main/resources/application.properties b/1.x/Chapter3-1-8/src/main/resources/application.properties
old mode 100644
new mode 100755
similarity index 100%
rename from Chapter4-2-2/src/main/resources/application.properties
rename to 1.x/Chapter3-1-8/src/main/resources/application.properties
diff --git a/Chapter3-2-1/pom.xml b/1.x/Chapter3-2-1/pom.xml
similarity index 100%
rename from Chapter3-2-1/pom.xml
rename to 1.x/Chapter3-2-1/pom.xml
diff --git a/Chapter3-2-1/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-1/src/main/java/com/didispace/service/UserService.java b/1.x/Chapter3-2-1/src/main/java/com/didispace/service/UserService.java
similarity index 100%
rename from Chapter3-2-1/src/main/java/com/didispace/service/UserService.java
rename to 1.x/Chapter3-2-1/src/main/java/com/didispace/service/UserService.java
diff --git a/Chapter3-2-1/src/main/java/com/didispace/service/UserServiceImpl.java b/1.x/Chapter3-2-1/src/main/java/com/didispace/service/UserServiceImpl.java
similarity index 100%
rename from Chapter3-2-1/src/main/java/com/didispace/service/UserServiceImpl.java
rename to 1.x/Chapter3-2-1/src/main/java/com/didispace/service/UserServiceImpl.java
diff --git a/Chapter3-2-1/src/main/resources/application.properties b/1.x/Chapter3-2-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-1/src/main/resources/application.properties
rename to 1.x/Chapter3-2-1/src/main/resources/application.properties
diff --git a/Chapter3-2-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/1.x/Chapter3-2-10/pom.xml b/1.x/Chapter3-2-10/pom.xml
new file mode 100644
index 00000000..a5527fc2
--- /dev/null
+++ b/1.x/Chapter3-2-10/pom.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>Chapter3-2-10</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter3-2-10</name>
+	<description>Spring Boot project</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.5.9.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-ldap</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.unboundid</groupId>
+			<artifactId>unboundid-ldapsdk</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.16.16</version>
+			<scope>provided</scope>
+		</dependency>
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/Chapter3-2-2/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-10/src/main/java/com/didispace/Application.java
old mode 100755
new mode 100644
similarity index 100%
rename from Chapter3-2-2/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-10/src/main/java/com/didispace/Application.java
diff --git a/1.x/Chapter3-2-10/src/main/java/com/didispace/Person.java b/1.x/Chapter3-2-10/src/main/java/com/didispace/Person.java
new file mode 100644
index 00000000..fbbb8d3b
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/main/java/com/didispace/Person.java
@@ -0,0 +1,22 @@
+package com.didispace;
+
+import lombok.Data;
+import org.springframework.ldap.odm.annotations.*;
+
+import javax.naming.Name;
+
+@Entry(base = "ou=people,dc=didispace,dc=com", objectClasses = "inetOrgPerson")
+@Data
+public class Person {
+
+    @Id
+    private Name id;
+    @DnAttribute(value = "uid", index = 3)
+    private String uid;
+    @Attribute(name = "cn")
+    private String commonName;
+    @Attribute(name = "sn")
+    private String suerName;
+    private String userPassword;
+
+}
diff --git a/1.x/Chapter3-2-10/src/main/java/com/didispace/PersonRepository.java b/1.x/Chapter3-2-10/src/main/java/com/didispace/PersonRepository.java
new file mode 100644
index 00000000..a02bd2bd
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/main/java/com/didispace/PersonRepository.java
@@ -0,0 +1,10 @@
+package com.didispace;
+
+import org.springframework.data.repository.CrudRepository;
+
+import javax.naming.Name;
+
+public interface PersonRepository extends CrudRepository<Person, Name> {
+
+
+}
\ No newline at end of file
diff --git a/1.x/Chapter3-2-10/src/main/resources/application.properties b/1.x/Chapter3-2-10/src/main/resources/application.properties
new file mode 100644
index 00000000..4b3fab0b
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+#spring.ldap.urls=ldap://localhost:1235
+#spring.ldap.base=dc=didispace,dc=com
+#spring.ldap.username=didispace
+#spring.ldap.password=123456
\ No newline at end of file
diff --git a/1.x/Chapter3-2-10/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-10/src/test/java/com/didispace/ApplicationTests.java
new file mode 100644
index 00000000..dc188774
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/test/java/com/didispace/ApplicationTests.java
@@ -0,0 +1,39 @@
+package com.didispace;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+	@Autowired
+	private PersonRepository personRepository;
+
+	@Test
+	public void findAll() throws Exception {
+
+		personRepository.findAll().forEach(p -> {
+			System.out.println(p);
+		});
+
+	}
+
+	@Test
+	public void save() throws Exception {
+		Person person = new Person();
+		person.setUid("uid:1");
+		person.setSuerName("AAA");
+		person.setCommonName("aaa");
+		person.setUserPassword("123456");
+		personRepository.save(person);
+
+		personRepository.findAll().forEach(p -> {
+			System.out.println(p);
+		});
+	}
+
+}
diff --git a/1.x/Chapter3-2-10/src/test/resources/application.properties b/1.x/Chapter3-2-10/src/test/resources/application.properties
new file mode 100644
index 00000000..08bbb56b
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/test/resources/application.properties
@@ -0,0 +1,3 @@
+spring.ldap.embedded.ldif=ldap-server.ldif
+spring.ldap.embedded.base-dn=dc=didispace,dc=com
+
diff --git a/1.x/Chapter3-2-10/src/test/resources/ldap-server.ldif b/1.x/Chapter3-2-10/src/test/resources/ldap-server.ldif
new file mode 100644
index 00000000..4eac0611
--- /dev/null
+++ b/1.x/Chapter3-2-10/src/test/resources/ldap-server.ldif
@@ -0,0 +1,18 @@
+dn: dc=didispace,dc=com
+objectClass: top
+objectClass: domain
+
+dn: ou=people,dc=didispace,dc=com
+objectclass: top
+objectclass: organizationalUnit
+ou: people
+
+dn: uid=ben,ou=people,dc=didispace,dc=com
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: didi
+sn: zhaiyongchao
+uid: didi
+userPassword: {SHA}nFCebWjxfaLbHHG1Qk5UU4trbvQ=
diff --git a/1.x/Chapter3-2-11/pom.xml b/1.x/Chapter3-2-11/pom.xml
new file mode 100755
index 00000000..d9ac4cf1
--- /dev/null
+++ b/1.x/Chapter3-2-11/pom.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>Chapter3-2-11</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Chapter3-2-11</name>
+    <description>Spring Boot project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.10.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.spring4all</groupId>
+            <artifactId>mongodb-plus-spring-boot-starter</artifactId>
+            <version>1.0.0.RELEASE</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.12</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>
diff --git a/1.x/Chapter3-2-11/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-11/src/main/java/com/didispace/Application.java
new file mode 100755
index 00000000..89042041
--- /dev/null
+++ b/1.x/Chapter3-2-11/src/main/java/com/didispace/Application.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import com.spring4all.mongodb.EnableMongoPlus;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@EnableMongoPlus
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}
diff --git a/1.x/Chapter3-2-11/src/main/resources/application.properties b/1.x/Chapter3-2-11/src/main/resources/application.properties
new file mode 100644
index 00000000..e3f19a14
--- /dev/null
+++ b/1.x/Chapter3-2-11/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+spring.data.mongodb.uri=mongodb://localhost:27017/test
+
+spring.data.mongodb.option.min-connection-per-host=20
+spring.data.mongodb.option.max-connection-per-host=200
diff --git a/1.x/Chapter3-2-11/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-11/src/test/java/com/didispace/ApplicationTests.java
new file mode 100755
index 00000000..b3671364
--- /dev/null
+++ b/1.x/Chapter3-2-11/src/test/java/com/didispace/ApplicationTests.java
@@ -0,0 +1,27 @@
+package com.didispace;
+
+import com.mongodb.MongoClient;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@Slf4j
+public class ApplicationTests {
+
+    @Autowired
+    private MongoClient mongoClient;
+
+    @Test
+    public void test() throws Exception {
+        log.info("MinConnectionsPerHost = {}, MaxConnectionsPerHost = {}",
+                mongoClient.getMongoClientOptions().getMinConnectionsPerHost(),
+                mongoClient.getMongoClientOptions().getConnectionsPerHost());
+    }
+
+}
diff --git a/Chapter3-2-2/pom.xml b/1.x/Chapter3-2-2/pom.xml
similarity index 100%
rename from Chapter3-2-2/pom.xml
rename to 1.x/Chapter3-2-2/pom.xml
diff --git a/Chapter3-2-5/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-2/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-5/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-2/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-2/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-2-2/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-2-2/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-2-2/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-2-2/src/main/java/com/didispace/domain/UserRepository.java b/1.x/Chapter3-2-2/src/main/java/com/didispace/domain/UserRepository.java
similarity index 100%
rename from Chapter3-2-2/src/main/java/com/didispace/domain/UserRepository.java
rename to 1.x/Chapter3-2-2/src/main/java/com/didispace/domain/UserRepository.java
diff --git a/Chapter3-2-2/src/main/resources/application.properties b/1.x/Chapter3-2-2/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-2/src/main/resources/application.properties
rename to 1.x/Chapter3-2-2/src/main/resources/application.properties
diff --git a/Chapter3-2-2/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-2/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-2/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-2/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-3/pom.xml b/1.x/Chapter3-2-3/pom.xml
similarity index 100%
rename from Chapter3-2-3/pom.xml
rename to 1.x/Chapter3-2-3/pom.xml
diff --git a/Chapter3-2-3/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-3/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-3/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-3/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-3/src/main/java/com/didispace/DataSourceConfig.java b/1.x/Chapter3-2-3/src/main/java/com/didispace/DataSourceConfig.java
similarity index 100%
rename from Chapter3-2-3/src/main/java/com/didispace/DataSourceConfig.java
rename to 1.x/Chapter3-2-3/src/main/java/com/didispace/DataSourceConfig.java
diff --git a/Chapter3-2-3/src/main/resources/application.properties b/1.x/Chapter3-2-3/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-3/src/main/resources/application.properties
rename to 1.x/Chapter3-2-3/src/main/resources/application.properties
diff --git a/Chapter3-2-3/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-3/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-3/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-3/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-4/pom.xml b/1.x/Chapter3-2-4/pom.xml
similarity index 100%
rename from Chapter3-2-4/pom.xml
rename to 1.x/Chapter3-2-4/pom.xml
diff --git a/Chapter3-2-4/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/DataSourceConfig.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/DataSourceConfig.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/DataSourceConfig.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/DataSourceConfig.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/PrimaryConfig.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/PrimaryConfig.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/PrimaryConfig.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/PrimaryConfig.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/SecondaryConfig.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/SecondaryConfig.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/SecondaryConfig.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/SecondaryConfig.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/domain/p/User.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/domain/p/User.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/domain/p/User.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/domain/p/User.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/domain/p/UserRepository.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/domain/p/UserRepository.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/domain/p/UserRepository.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/domain/p/UserRepository.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/domain/s/Message.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/domain/s/Message.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/domain/s/Message.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/domain/s/Message.java
diff --git a/Chapter3-2-4/src/main/java/com/didispace/domain/s/MessageRepository.java b/1.x/Chapter3-2-4/src/main/java/com/didispace/domain/s/MessageRepository.java
similarity index 100%
rename from Chapter3-2-4/src/main/java/com/didispace/domain/s/MessageRepository.java
rename to 1.x/Chapter3-2-4/src/main/java/com/didispace/domain/s/MessageRepository.java
diff --git a/Chapter3-2-4/src/main/resources/application.properties b/1.x/Chapter3-2-4/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-4/src/main/resources/application.properties
rename to 1.x/Chapter3-2-4/src/main/resources/application.properties
diff --git a/Chapter3-2-4/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-4/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-4/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-4/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-5/pom.xml b/1.x/Chapter3-2-5/pom.xml
similarity index 100%
rename from Chapter3-2-5/pom.xml
rename to 1.x/Chapter3-2-5/pom.xml
diff --git a/Chapter3-2-6/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-5/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-6/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-5/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-5/src/main/java/com/didispace/RedisConfig.java b/1.x/Chapter3-2-5/src/main/java/com/didispace/RedisConfig.java
similarity index 100%
rename from Chapter3-2-5/src/main/java/com/didispace/RedisConfig.java
rename to 1.x/Chapter3-2-5/src/main/java/com/didispace/RedisConfig.java
diff --git a/Chapter3-2-5/src/main/java/com/didispace/RedisObjectSerializer.java b/1.x/Chapter3-2-5/src/main/java/com/didispace/RedisObjectSerializer.java
similarity index 100%
rename from Chapter3-2-5/src/main/java/com/didispace/RedisObjectSerializer.java
rename to 1.x/Chapter3-2-5/src/main/java/com/didispace/RedisObjectSerializer.java
diff --git a/Chapter3-2-5/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-2-5/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-2-5/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-2-5/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-2-5/src/main/resources/application.properties b/1.x/Chapter3-2-5/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-5/src/main/resources/application.properties
rename to 1.x/Chapter3-2-5/src/main/resources/application.properties
diff --git a/Chapter3-2-5/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-5/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-5/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-5/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-6/pom.xml b/1.x/Chapter3-2-6/pom.xml
similarity index 100%
rename from Chapter3-2-6/pom.xml
rename to 1.x/Chapter3-2-6/pom.xml
diff --git a/Chapter3-2-7/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-6/src/main/java/com/didispace/Application.java
old mode 100644
new mode 100755
similarity index 100%
rename from Chapter3-2-7/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-6/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-6/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-2-6/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-2-6/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-2-6/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-2-6/src/main/java/com/didispace/domain/UserRepository.java b/1.x/Chapter3-2-6/src/main/java/com/didispace/domain/UserRepository.java
similarity index 100%
rename from Chapter3-2-6/src/main/java/com/didispace/domain/UserRepository.java
rename to 1.x/Chapter3-2-6/src/main/java/com/didispace/domain/UserRepository.java
diff --git a/Chapter3-2-6/src/main/resources/application.properties b/1.x/Chapter3-2-6/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-6/src/main/resources/application.properties
rename to 1.x/Chapter3-2-6/src/main/resources/application.properties
diff --git a/Chapter3-2-6/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-6/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-6/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-6/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-7/pom.xml b/1.x/Chapter3-2-7/pom.xml
similarity index 100%
rename from Chapter3-2-7/pom.xml
rename to 1.x/Chapter3-2-7/pom.xml
diff --git a/Chapter3-2-8/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-7/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter3-2-8/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-7/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-7/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-2-7/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-2-7/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-2-7/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-2-7/src/main/java/com/didispace/domain/UserMapper.java b/1.x/Chapter3-2-7/src/main/java/com/didispace/domain/UserMapper.java
similarity index 100%
rename from Chapter3-2-7/src/main/java/com/didispace/domain/UserMapper.java
rename to 1.x/Chapter3-2-7/src/main/java/com/didispace/domain/UserMapper.java
diff --git a/Chapter3-2-7/src/main/resources/application.properties b/1.x/Chapter3-2-7/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-7/src/main/resources/application.properties
rename to 1.x/Chapter3-2-7/src/main/resources/application.properties
diff --git a/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-8/pom.xml b/1.x/Chapter3-2-8/pom.xml
similarity index 100%
rename from Chapter3-2-8/pom.xml
rename to 1.x/Chapter3-2-8/pom.xml
diff --git a/Chapter3-2-9/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-8/src/main/java/com/didispace/Application.java
old mode 100755
new mode 100644
similarity index 100%
rename from Chapter3-2-9/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-8/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-8/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-2-8/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-2-8/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-2-8/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-2-8/src/main/java/com/didispace/domain/UserMapper.java b/1.x/Chapter3-2-8/src/main/java/com/didispace/domain/UserMapper.java
similarity index 100%
rename from Chapter3-2-8/src/main/java/com/didispace/domain/UserMapper.java
rename to 1.x/Chapter3-2-8/src/main/java/com/didispace/domain/UserMapper.java
diff --git a/Chapter3-2-8/src/main/resources/application.properties b/1.x/Chapter3-2-8/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-8/src/main/resources/application.properties
rename to 1.x/Chapter3-2-8/src/main/resources/application.properties
diff --git a/Chapter3-2-8/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-8/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-8/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-8/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-2-9/pom.xml b/1.x/Chapter3-2-9/pom.xml
similarity index 100%
rename from Chapter3-2-9/pom.xml
rename to 1.x/Chapter3-2-9/pom.xml
diff --git a/Chapter3-3-1/src/main/java/com/didispace/Application.java b/1.x/Chapter3-2-9/src/main/java/com/didispace/Application.java
old mode 100644
new mode 100755
similarity index 100%
rename from Chapter3-3-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-2-9/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-2-9/src/main/java/com/didispace/service/UserService.java b/1.x/Chapter3-2-9/src/main/java/com/didispace/service/UserService.java
similarity index 100%
rename from Chapter3-2-9/src/main/java/com/didispace/service/UserService.java
rename to 1.x/Chapter3-2-9/src/main/java/com/didispace/service/UserService.java
diff --git a/Chapter3-2-9/src/main/java/com/didispace/service/UserServiceImpl.java b/1.x/Chapter3-2-9/src/main/java/com/didispace/service/UserServiceImpl.java
similarity index 100%
rename from Chapter3-2-9/src/main/java/com/didispace/service/UserServiceImpl.java
rename to 1.x/Chapter3-2-9/src/main/java/com/didispace/service/UserServiceImpl.java
diff --git a/Chapter3-2-9/src/main/resources/application.properties b/1.x/Chapter3-2-9/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-2-9/src/main/resources/application.properties
rename to 1.x/Chapter3-2-9/src/main/resources/application.properties
diff --git a/Chapter3-2-9/src/main/resources/db/V1__Base_version.sql b/1.x/Chapter3-2-9/src/main/resources/db/V1__Base_version.sql
similarity index 100%
rename from Chapter3-2-9/src/main/resources/db/V1__Base_version.sql
rename to 1.x/Chapter3-2-9/src/main/resources/db/V1__Base_version.sql
diff --git a/Chapter3-2-9/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-2-9/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-2-9/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-2-9/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter3-3-1/pom.xml b/1.x/Chapter3-3-1/pom.xml
similarity index 100%
rename from Chapter3-3-1/pom.xml
rename to 1.x/Chapter3-3-1/pom.xml
diff --git a/Chapter4-2-4/src/main/java/com/didispace/Application.java b/1.x/Chapter3-3-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-2-4/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter3-3-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter3-3-1/src/main/java/com/didispace/domain/User.java b/1.x/Chapter3-3-1/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter3-3-1/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter3-3-1/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter3-3-1/src/main/java/com/didispace/domain/UserRepository.java b/1.x/Chapter3-3-1/src/main/java/com/didispace/domain/UserRepository.java
similarity index 100%
rename from Chapter3-3-1/src/main/java/com/didispace/domain/UserRepository.java
rename to 1.x/Chapter3-3-1/src/main/java/com/didispace/domain/UserRepository.java
diff --git a/Chapter3-3-1/src/main/java/com/didispace/service/UserService.java b/1.x/Chapter3-3-1/src/main/java/com/didispace/service/UserService.java
similarity index 100%
rename from Chapter3-3-1/src/main/java/com/didispace/service/UserService.java
rename to 1.x/Chapter3-3-1/src/main/java/com/didispace/service/UserService.java
diff --git a/Chapter3-3-1/src/main/resources/application.properties b/1.x/Chapter3-3-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter3-3-1/src/main/resources/application.properties
rename to 1.x/Chapter3-3-1/src/main/resources/application.properties
diff --git a/Chapter3-3-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter3-3-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter3-3-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter3-3-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-1-1/pom.xml b/1.x/Chapter4-1-1/pom.xml
similarity index 100%
rename from Chapter4-1-1/pom.xml
rename to 1.x/Chapter4-1-1/pom.xml
diff --git a/Chapter4-1-1/src/main/java/com/didispace/Application.java b/1.x/Chapter4-1-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-1-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-1-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-1-1/src/main/java/com/didispace/task/ScheduledTasks.java b/1.x/Chapter4-1-1/src/main/java/com/didispace/task/ScheduledTasks.java
similarity index 100%
rename from Chapter4-1-1/src/main/java/com/didispace/task/ScheduledTasks.java
rename to 1.x/Chapter4-1-1/src/main/java/com/didispace/task/ScheduledTasks.java
diff --git a/Chapter4-2-4/src/main/resources/application.properties b/1.x/Chapter4-1-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-2-4/src/main/resources/application.properties
rename to 1.x/Chapter4-1-1/src/main/resources/application.properties
diff --git a/Chapter4-1-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-1-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-1-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-1-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-1-2/pom.xml b/1.x/Chapter4-1-2/pom.xml
similarity index 100%
rename from Chapter4-1-2/pom.xml
rename to 1.x/Chapter4-1-2/pom.xml
diff --git a/Chapter4-1-2/src/main/java/com/didispace/Application.java b/1.x/Chapter4-1-2/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-1-2/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-1-2/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-1-2/src/main/java/com/didispace/async/Task.java b/1.x/Chapter4-1-2/src/main/java/com/didispace/async/Task.java
similarity index 100%
rename from Chapter4-1-2/src/main/java/com/didispace/async/Task.java
rename to 1.x/Chapter4-1-2/src/main/java/com/didispace/async/Task.java
diff --git a/Chapter4-2-5/src/main/resources/application.properties b/1.x/Chapter4-1-2/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-2-5/src/main/resources/application.properties
rename to 1.x/Chapter4-1-2/src/main/resources/application.properties
diff --git a/Chapter4-1-2/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-1-2/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-1-2/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-1-2/src/test/java/com/didispace/ApplicationTests.java
diff --git a/1.x/Chapter4-1-3/pom.xml b/1.x/Chapter4-1-3/pom.xml
new file mode 100644
index 00000000..b72b7802
--- /dev/null
+++ b/1.x/Chapter4-1-3/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>Chapter4-1-3</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Chapter4-1-3</name>
+    <description>Spring Boot project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.10.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.20</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter4-1-3/src/main/java/com/didispace/Application.java b/1.x/Chapter4-1-3/src/main/java/com/didispace/Application.java
new file mode 100644
index 00000000..84d84ef2
--- /dev/null
+++ b/1.x/Chapter4-1-3/src/main/java/com/didispace/Application.java
@@ -0,0 +1,38 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @EnableAsync
+    @Configuration
+    class TaskPoolConfig {
+
+        @Bean("taskExecutor")
+        public Executor taskExecutor() {
+            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+            executor.setCorePoolSize(10);
+            executor.setMaxPoolSize(20);
+            executor.setQueueCapacity(200);
+            executor.setKeepAliveSeconds(60);
+            executor.setThreadNamePrefix("taskExecutor-");
+            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+            return executor;
+        }
+    }
+
+}
diff --git a/1.x/Chapter4-1-3/src/main/java/com/didispace/async/Task.java b/1.x/Chapter4-1-3/src/main/java/com/didispace/async/Task.java
new file mode 100644
index 00000000..07891f82
--- /dev/null
+++ b/1.x/Chapter4-1-3/src/main/java/com/didispace/async/Task.java
@@ -0,0 +1,48 @@
+package com.didispace.async;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/16 下午12:58.
+ * @blog http://blog.didispace.com
+ */
+@Slf4j
+@Component
+public class Task {
+
+    public static Random random = new Random();
+
+    @Async("taskExecutor")
+    public void doTaskOne() throws Exception {
+        log.info("开始做任务一");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务一，耗时：" + (end - start) + "毫秒");
+    }
+
+    @Async("taskExecutor")
+    public void doTaskTwo() throws Exception {
+        log.info("开始做任务二");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务二，耗时：" + (end - start) + "毫秒");
+    }
+
+    @Async("taskExecutor")
+    public void doTaskThree() throws Exception {
+        log.info("开始做任务三");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务三，耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/Chapter4-3-1/src/main/resources/application.properties b/1.x/Chapter4-1-3/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-3-1/src/main/resources/application.properties
rename to 1.x/Chapter4-1-3/src/main/resources/application.properties
diff --git a/1.x/Chapter4-1-3/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-1-3/src/test/java/com/didispace/ApplicationTests.java
new file mode 100644
index 00000000..03d3fab7
--- /dev/null
+++ b/1.x/Chapter4-1-3/src/test/java/com/didispace/ApplicationTests.java
@@ -0,0 +1,28 @@
+package com.didispace;
+
+import com.didispace.async.Task;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+    @Autowired
+    private Task task;
+
+    @Test
+    public void test() throws Exception {
+
+        task.doTaskOne();
+        task.doTaskTwo();
+        task.doTaskThree();
+
+        Thread.currentThread().join();
+    }
+
+}
diff --git a/1.x/Chapter4-1-4/pom.xml b/1.x/Chapter4-1-4/pom.xml
new file mode 100644
index 00000000..c8b4be29
--- /dev/null
+++ b/1.x/Chapter4-1-4/pom.xml
@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>Chapter4-1-4</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Chapter4-1-4</name>
+    <description>Spring Boot project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.10.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-redis</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.20</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter4-1-4/src/main/java/com/didispace/Application.java b/1.x/Chapter4-1-4/src/main/java/com/didispace/Application.java
new file mode 100644
index 00000000..5de0f631
--- /dev/null
+++ b/1.x/Chapter4-1-4/src/main/java/com/didispace/Application.java
@@ -0,0 +1,36 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
+
+import java.util.concurrent.Executor;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @EnableAsync
+    @Configuration
+    class TaskPoolConfig {
+
+        @Bean("taskExecutor")
+        public Executor taskExecutor() {
+            ThreadPoolTaskScheduler executor = new ThreadPoolTaskScheduler();
+            executor.setPoolSize(20);
+            executor.setThreadNamePrefix("taskExecutor-");
+
+            executor.setWaitForTasksToCompleteOnShutdown(true);
+            executor.setAwaitTerminationSeconds(60);
+            return executor;
+        }
+
+    }
+
+}
diff --git a/1.x/Chapter4-1-4/src/main/java/com/didispace/async/Task.java b/1.x/Chapter4-1-4/src/main/java/com/didispace/async/Task.java
new file mode 100644
index 00000000..ac0b102c
--- /dev/null
+++ b/1.x/Chapter4-1-4/src/main/java/com/didispace/async/Task.java
@@ -0,0 +1,49 @@
+package com.didispace.async;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/16 下午12:58.
+ * @blog http://blog.didispace.com
+ */
+@Slf4j
+@Component
+public class Task {
+
+    @Autowired
+    private StringRedisTemplate stringRedisTemplate;
+
+    @Async("taskExecutor")
+    public void doTaskOne() throws Exception {
+        log.info("开始做任务一");
+        long start = System.currentTimeMillis();
+        log.info(stringRedisTemplate.randomKey());
+        long end = System.currentTimeMillis();
+        log.info("完成任务一，耗时：" + (end - start) + "毫秒");
+    }
+
+    @Async("taskExecutor")
+    public void doTaskTwo() throws Exception {
+        log.info("开始做任务二");
+        long start = System.currentTimeMillis();
+        log.info(stringRedisTemplate.randomKey());
+        long end = System.currentTimeMillis();
+        log.info("完成任务二，耗时：" + (end - start) + "毫秒");
+    }
+
+    @Async("taskExecutor")
+    public void doTaskThree() throws Exception {
+        log.info("开始做任务三");
+        long start = System.currentTimeMillis();
+        log.info(stringRedisTemplate.randomKey());
+        long end = System.currentTimeMillis();
+        log.info("完成任务三，耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/1.x/Chapter4-1-4/src/main/resources/application.properties b/1.x/Chapter4-1-4/src/main/resources/application.properties
new file mode 100644
index 00000000..806eddf3
--- /dev/null
+++ b/1.x/Chapter4-1-4/src/main/resources/application.properties
@@ -0,0 +1,2 @@
+spring.redis.pool.max-wait=5000
+spring.redis.pool.max-active=10
diff --git a/1.x/Chapter4-1-4/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-1-4/src/test/java/com/didispace/ApplicationTests.java
new file mode 100644
index 00000000..61107f29
--- /dev/null
+++ b/1.x/Chapter4-1-4/src/test/java/com/didispace/ApplicationTests.java
@@ -0,0 +1,34 @@
+package com.didispace;
+
+import com.didispace.async.Task;
+import lombok.SneakyThrows;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+    @Autowired
+    private Task task;
+
+    @Test
+    @SneakyThrows
+    public void test() {
+
+        for (int i = 0; i < 10000; i++) {
+            task.doTaskOne();
+            task.doTaskTwo();
+            task.doTaskThree();
+
+            if (i == 9999) {
+                System.exit(0);
+            }
+        }
+    }
+
+}
diff --git a/1.x/Chapter4-1-5/pom.xml b/1.x/Chapter4-1-5/pom.xml
new file mode 100644
index 00000000..524627d6
--- /dev/null
+++ b/1.x/Chapter4-1-5/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>Chapter4-1-5</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Chapter4-1-5</name>
+    <description>Spring Boot project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.10.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.20</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/1.x/Chapter4-1-5/src/main/java/com/didispace/Application.java b/1.x/Chapter4-1-5/src/main/java/com/didispace/Application.java
new file mode 100644
index 00000000..84d84ef2
--- /dev/null
+++ b/1.x/Chapter4-1-5/src/main/java/com/didispace/Application.java
@@ -0,0 +1,38 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @EnableAsync
+    @Configuration
+    class TaskPoolConfig {
+
+        @Bean("taskExecutor")
+        public Executor taskExecutor() {
+            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+            executor.setCorePoolSize(10);
+            executor.setMaxPoolSize(20);
+            executor.setQueueCapacity(200);
+            executor.setKeepAliveSeconds(60);
+            executor.setThreadNamePrefix("taskExecutor-");
+            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+            return executor;
+        }
+    }
+
+}
diff --git a/1.x/Chapter4-1-5/src/main/java/com/didispace/async/Task.java b/1.x/Chapter4-1-5/src/main/java/com/didispace/async/Task.java
new file mode 100644
index 00000000..49f5f7e0
--- /dev/null
+++ b/1.x/Chapter4-1-5/src/main/java/com/didispace/async/Task.java
@@ -0,0 +1,32 @@
+package com.didispace.async;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.scheduling.annotation.AsyncResult;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.Future;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/16 下午12:58.
+ * @blog http://blog.didispace.com
+ */
+@Slf4j
+@Component
+public class Task {
+
+    public static Random random = new Random();
+
+    @Async("taskExecutor")
+    public Future<String> run() throws Exception {
+        long sleep = random.nextInt(10000);
+        log.info("开始任务，需耗时：" + sleep + "毫秒");
+        Thread.sleep(sleep);
+        log.info("完成任务");
+        return new AsyncResult<>("test");
+    }
+
+}
diff --git a/1.x/Chapter4-1-5/src/main/resources/application.properties b/1.x/Chapter4-1-5/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/1.x/Chapter4-1-5/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-1-5/src/test/java/com/didispace/ApplicationTests.java
new file mode 100644
index 00000000..c9cd12fd
--- /dev/null
+++ b/1.x/Chapter4-1-5/src/test/java/com/didispace/ApplicationTests.java
@@ -0,0 +1,29 @@
+package com.didispace;
+
+import com.didispace.async.Task;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+@Slf4j
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+    @Autowired
+    private Task task;
+
+    @Test
+    public void test() throws Exception {
+        Future<String> futureResult = task.run();
+        String result = futureResult.get(5, TimeUnit.SECONDS);
+        log.info(result);
+    }
+
+}
diff --git a/Chapter4-2-2/pom.xml b/1.x/Chapter4-2-2/pom.xml
similarity index 100%
rename from Chapter4-2-2/pom.xml
rename to 1.x/Chapter4-2-2/pom.xml
diff --git a/Chapter4-2-2/src/main/java/com/didispace/Application.java b/1.x/Chapter4-2-2/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-2-2/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-2-2/src/main/java/com/didispace/Application.java
diff --git a/1.x/Chapter4-2-2/src/main/resources/application.properties b/1.x/Chapter4-2-2/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/Chapter4-2-2/src/main/resources/log4j.properties b/1.x/Chapter4-2-2/src/main/resources/log4j.properties
similarity index 100%
rename from Chapter4-2-2/src/main/resources/log4j.properties
rename to 1.x/Chapter4-2-2/src/main/resources/log4j.properties
diff --git a/Chapter4-2-2/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-2-2/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-2-2/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-2-2/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-2-3/pom.xml b/1.x/Chapter4-2-3/pom.xml
similarity index 100%
rename from Chapter4-2-3/pom.xml
rename to 1.x/Chapter4-2-3/pom.xml
diff --git a/Chapter4-2-3/src/main/java/com/didispace/Application.java b/1.x/Chapter4-2-3/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-2-3/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-2-3/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-2-3/src/main/resources/application-dev.properties b/1.x/Chapter4-2-3/src/main/resources/application-dev.properties
similarity index 100%
rename from Chapter4-2-3/src/main/resources/application-dev.properties
rename to 1.x/Chapter4-2-3/src/main/resources/application-dev.properties
diff --git a/Chapter4-2-3/src/main/resources/application-prod.properties b/1.x/Chapter4-2-3/src/main/resources/application-prod.properties
similarity index 100%
rename from Chapter4-2-3/src/main/resources/application-prod.properties
rename to 1.x/Chapter4-2-3/src/main/resources/application-prod.properties
diff --git a/Chapter4-2-3/src/main/resources/application-test.properties b/1.x/Chapter4-2-3/src/main/resources/application-test.properties
similarity index 100%
rename from Chapter4-2-3/src/main/resources/application-test.properties
rename to 1.x/Chapter4-2-3/src/main/resources/application-test.properties
diff --git a/Chapter4-2-3/src/main/resources/application.properties b/1.x/Chapter4-2-3/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-2-3/src/main/resources/application.properties
rename to 1.x/Chapter4-2-3/src/main/resources/application.properties
diff --git a/Chapter4-2-3/src/main/resources/log4j.properties b/1.x/Chapter4-2-3/src/main/resources/log4j.properties
similarity index 100%
rename from Chapter4-2-3/src/main/resources/log4j.properties
rename to 1.x/Chapter4-2-3/src/main/resources/log4j.properties
diff --git a/Chapter4-2-3/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-2-3/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-2-3/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-2-3/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-2-4/pom.xml b/1.x/Chapter4-2-4/pom.xml
similarity index 100%
rename from Chapter4-2-4/pom.xml
rename to 1.x/Chapter4-2-4/pom.xml
diff --git a/Chapter4-2-5/src/main/java/com/didispace/Application.java b/1.x/Chapter4-2-4/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-2-5/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-2-4/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-2-4/src/main/java/com/didispace/aspect/WebLogAspect.java b/1.x/Chapter4-2-4/src/main/java/com/didispace/aspect/WebLogAspect.java
similarity index 100%
rename from Chapter4-2-4/src/main/java/com/didispace/aspect/WebLogAspect.java
rename to 1.x/Chapter4-2-4/src/main/java/com/didispace/aspect/WebLogAspect.java
diff --git a/Chapter4-2-4/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter4-2-4/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter4-2-4/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter4-2-4/src/main/java/com/didispace/web/HelloController.java
diff --git a/1.x/Chapter4-2-4/src/main/resources/application.properties b/1.x/Chapter4-2-4/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/Chapter4-2-4/src/main/resources/log4j.properties b/1.x/Chapter4-2-4/src/main/resources/log4j.properties
similarity index 100%
rename from Chapter4-2-4/src/main/resources/log4j.properties
rename to 1.x/Chapter4-2-4/src/main/resources/log4j.properties
diff --git a/Chapter4-2-4/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-2-4/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-2-4/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-2-4/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-2-5/pom.xml b/1.x/Chapter4-2-5/pom.xml
similarity index 100%
rename from Chapter4-2-5/pom.xml
rename to 1.x/Chapter4-2-5/pom.xml
diff --git a/Chapter4-5-1/src/main/java/com/didispace/Application.java b/1.x/Chapter4-2-5/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-5-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-2-5/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-2-5/src/main/java/com/didispace/aspect/WebLogAspect.java b/1.x/Chapter4-2-5/src/main/java/com/didispace/aspect/WebLogAspect.java
similarity index 100%
rename from Chapter4-2-5/src/main/java/com/didispace/aspect/WebLogAspect.java
rename to 1.x/Chapter4-2-5/src/main/java/com/didispace/aspect/WebLogAspect.java
diff --git a/Chapter4-2-5/src/main/java/com/didispace/log/MongoAppender.java b/1.x/Chapter4-2-5/src/main/java/com/didispace/log/MongoAppender.java
similarity index 100%
rename from Chapter4-2-5/src/main/java/com/didispace/log/MongoAppender.java
rename to 1.x/Chapter4-2-5/src/main/java/com/didispace/log/MongoAppender.java
diff --git a/Chapter4-2-5/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter4-2-5/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter4-2-5/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter4-2-5/src/main/java/com/didispace/web/HelloController.java
diff --git a/1.x/Chapter4-2-5/src/main/resources/application.properties b/1.x/Chapter4-2-5/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/Chapter4-2-5/src/main/resources/log4j.properties b/1.x/Chapter4-2-5/src/main/resources/log4j.properties
similarity index 100%
rename from Chapter4-2-5/src/main/resources/log4j.properties
rename to 1.x/Chapter4-2-5/src/main/resources/log4j.properties
diff --git a/Chapter4-2-5/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-2-5/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-2-5/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-2-5/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-2-6/pom.xml b/1.x/Chapter4-2-6/pom.xml
similarity index 100%
rename from Chapter4-2-6/pom.xml
rename to 1.x/Chapter4-2-6/pom.xml
diff --git a/Chapter4-2-6/src/main/java/com/didispace/DemoApplication.java b/1.x/Chapter4-2-6/src/main/java/com/didispace/DemoApplication.java
similarity index 100%
rename from Chapter4-2-6/src/main/java/com/didispace/DemoApplication.java
rename to 1.x/Chapter4-2-6/src/main/java/com/didispace/DemoApplication.java
diff --git a/Chapter4-2-6/src/main/resources/application.properties b/1.x/Chapter4-2-6/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-2-6/src/main/resources/application.properties
rename to 1.x/Chapter4-2-6/src/main/resources/application.properties
diff --git a/Chapter4-2-6/src/test/java/com/didispace/DemoApplicationTests.java b/1.x/Chapter4-2-6/src/test/java/com/didispace/DemoApplicationTests.java
similarity index 100%
rename from Chapter4-2-6/src/test/java/com/didispace/DemoApplicationTests.java
rename to 1.x/Chapter4-2-6/src/test/java/com/didispace/DemoApplicationTests.java
diff --git a/Chapter4-3-1/pom.xml b/1.x/Chapter4-3-1/pom.xml
similarity index 100%
rename from Chapter4-3-1/pom.xml
rename to 1.x/Chapter4-3-1/pom.xml
diff --git a/Chapter4-3-1/src/main/java/com/didispace/Application.java b/1.x/Chapter4-3-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-3-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-3-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-3-1/src/main/java/com/didispace/WebSecurityConfig.java b/1.x/Chapter4-3-1/src/main/java/com/didispace/WebSecurityConfig.java
similarity index 100%
rename from Chapter4-3-1/src/main/java/com/didispace/WebSecurityConfig.java
rename to 1.x/Chapter4-3-1/src/main/java/com/didispace/WebSecurityConfig.java
diff --git a/Chapter4-3-1/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter4-3-1/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter4-3-1/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter4-3-1/src/main/java/com/didispace/web/HelloController.java
diff --git a/1.x/Chapter4-3-1/src/main/resources/application.properties b/1.x/Chapter4-3-1/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/Chapter4-3-1/src/main/resources/templates/hello.html b/1.x/Chapter4-3-1/src/main/resources/templates/hello.html
similarity index 100%
rename from Chapter4-3-1/src/main/resources/templates/hello.html
rename to 1.x/Chapter4-3-1/src/main/resources/templates/hello.html
diff --git a/Chapter4-3-1/src/main/resources/templates/index.html b/1.x/Chapter4-3-1/src/main/resources/templates/index.html
similarity index 100%
rename from Chapter4-3-1/src/main/resources/templates/index.html
rename to 1.x/Chapter4-3-1/src/main/resources/templates/index.html
diff --git a/Chapter4-3-1/src/main/resources/templates/login.html b/1.x/Chapter4-3-1/src/main/resources/templates/login.html
similarity index 100%
rename from Chapter4-3-1/src/main/resources/templates/login.html
rename to 1.x/Chapter4-3-1/src/main/resources/templates/login.html
diff --git a/Chapter4-3-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-3-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-3-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-3-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-4-1/pom.xml b/1.x/Chapter4-4-1/pom.xml
similarity index 100%
rename from Chapter4-4-1/pom.xml
rename to 1.x/Chapter4-4-1/pom.xml
diff --git a/Chapter4-4-1/src/main/java/com/didispace/Application.java b/1.x/Chapter4-4-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-4-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-4-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-4-1/src/main/java/com/didispace/domain/User.java b/1.x/Chapter4-4-1/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter4-4-1/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter4-4-1/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter4-4-1/src/main/java/com/didispace/domain/UserRepository.java b/1.x/Chapter4-4-1/src/main/java/com/didispace/domain/UserRepository.java
similarity index 100%
rename from Chapter4-4-1/src/main/java/com/didispace/domain/UserRepository.java
rename to 1.x/Chapter4-4-1/src/main/java/com/didispace/domain/UserRepository.java
diff --git a/Chapter4-4-1/src/main/resources/application.properties b/1.x/Chapter4-4-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-4-1/src/main/resources/application.properties
rename to 1.x/Chapter4-4-1/src/main/resources/application.properties
diff --git a/Chapter4-4-1/src/main/resources/ehcache.xml b/1.x/Chapter4-4-1/src/main/resources/ehcache.xml
similarity index 100%
rename from Chapter4-4-1/src/main/resources/ehcache.xml
rename to 1.x/Chapter4-4-1/src/main/resources/ehcache.xml
diff --git a/Chapter4-4-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-4-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-4-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-4-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-4-2/pom.xml b/1.x/Chapter4-4-2/pom.xml
similarity index 100%
rename from Chapter4-4-2/pom.xml
rename to 1.x/Chapter4-4-2/pom.xml
diff --git a/Chapter4-4-2/src/main/java/com/didispace/Application.java b/1.x/Chapter4-4-2/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter4-4-2/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter4-4-2/src/main/java/com/didispace/Application.java
diff --git a/Chapter4-4-2/src/main/java/com/didispace/domain/User.java b/1.x/Chapter4-4-2/src/main/java/com/didispace/domain/User.java
similarity index 100%
rename from Chapter4-4-2/src/main/java/com/didispace/domain/User.java
rename to 1.x/Chapter4-4-2/src/main/java/com/didispace/domain/User.java
diff --git a/Chapter4-4-2/src/main/java/com/didispace/domain/UserRepository.java b/1.x/Chapter4-4-2/src/main/java/com/didispace/domain/UserRepository.java
similarity index 100%
rename from Chapter4-4-2/src/main/java/com/didispace/domain/UserRepository.java
rename to 1.x/Chapter4-4-2/src/main/java/com/didispace/domain/UserRepository.java
diff --git a/Chapter4-4-2/src/main/resources/application.properties b/1.x/Chapter4-4-2/src/main/resources/application.properties
similarity index 85%
rename from Chapter4-4-2/src/main/resources/application.properties
rename to 1.x/Chapter4-4-2/src/main/resources/application.properties
index 1a9d0255..248f22c4 100644
--- a/Chapter4-4-2/src/main/resources/application.properties
+++ b/1.x/Chapter4-4-2/src/main/resources/application.properties
@@ -3,6 +3,7 @@ spring.datasource.username=root
 spring.datasource.password=123456
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
 spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
 spring.jpa.properties.hibernate.show_sql=true
 
diff --git a/Chapter4-4-2/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-4-2/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-4-2/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-4-2/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-5-1/pom.xml b/1.x/Chapter4-5-1/pom.xml
similarity index 100%
rename from Chapter4-5-1/pom.xml
rename to 1.x/Chapter4-5-1/pom.xml
diff --git a/1.x/Chapter4-5-1/src/main/java/com/didispace/Application.java b/1.x/Chapter4-5-1/src/main/java/com/didispace/Application.java
new file mode 100644
index 00000000..2a14b751
--- /dev/null
+++ b/1.x/Chapter4-5-1/src/main/java/com/didispace/Application.java
@@ -0,0 +1,13 @@
+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}
diff --git a/Chapter4-5-1/src/main/resources/application.properties b/1.x/Chapter4-5-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter4-5-1/src/main/resources/application.properties
rename to 1.x/Chapter4-5-1/src/main/resources/application.properties
diff --git a/Chapter4-5-1/src/main/resources/templates/template.vm b/1.x/Chapter4-5-1/src/main/resources/templates/template.vm
similarity index 100%
rename from Chapter4-5-1/src/main/resources/templates/template.vm
rename to 1.x/Chapter4-5-1/src/main/resources/templates/template.vm
diff --git a/Chapter4-5-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter4-5-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter4-5-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter4-5-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter4-5-1/weixin.jpg b/1.x/Chapter4-5-1/weixin.jpg
similarity index 100%
rename from Chapter4-5-1/weixin.jpg
rename to 1.x/Chapter4-5-1/weixin.jpg
diff --git a/Chapter5-2-1/pom.xml b/1.x/Chapter5-2-1/pom.xml
similarity index 100%
rename from Chapter5-2-1/pom.xml
rename to 1.x/Chapter5-2-1/pom.xml
diff --git a/Chapter5-2-1/src/main/java/com/didispace/HelloApplication.java b/1.x/Chapter5-2-1/src/main/java/com/didispace/HelloApplication.java
similarity index 100%
rename from Chapter5-2-1/src/main/java/com/didispace/HelloApplication.java
rename to 1.x/Chapter5-2-1/src/main/java/com/didispace/HelloApplication.java
diff --git a/Chapter5-2-1/src/main/java/com/didispace/rabbit/RabbitConfig.java b/1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/RabbitConfig.java
similarity index 100%
rename from Chapter5-2-1/src/main/java/com/didispace/rabbit/RabbitConfig.java
rename to 1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/RabbitConfig.java
diff --git a/Chapter5-2-1/src/main/java/com/didispace/rabbit/Receiver.java b/1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/Receiver.java
similarity index 100%
rename from Chapter5-2-1/src/main/java/com/didispace/rabbit/Receiver.java
rename to 1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/Receiver.java
diff --git a/Chapter5-2-1/src/main/java/com/didispace/rabbit/Sender.java b/1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/Sender.java
similarity index 100%
rename from Chapter5-2-1/src/main/java/com/didispace/rabbit/Sender.java
rename to 1.x/Chapter5-2-1/src/main/java/com/didispace/rabbit/Sender.java
diff --git a/Chapter5-2-1/src/main/resources/application.properties b/1.x/Chapter5-2-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter5-2-1/src/main/resources/application.properties
rename to 1.x/Chapter5-2-1/src/main/resources/application.properties
diff --git a/Chapter5-2-1/src/test/java/com/didispace/HelloApplicationTests.java b/1.x/Chapter5-2-1/src/test/java/com/didispace/HelloApplicationTests.java
similarity index 100%
rename from Chapter5-2-1/src/test/java/com/didispace/HelloApplicationTests.java
rename to 1.x/Chapter5-2-1/src/test/java/com/didispace/HelloApplicationTests.java
diff --git a/Chapter6-1-1/pom.xml b/1.x/Chapter6-1-1/pom.xml
similarity index 100%
rename from Chapter6-1-1/pom.xml
rename to 1.x/Chapter6-1-1/pom.xml
diff --git a/Chapter6-1-1/src/main/java/com/didispace/Application.java b/1.x/Chapter6-1-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter6-1-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter6-1-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter6-1-1/src/main/java/com/didispace/EventConfig.java b/1.x/Chapter6-1-1/src/main/java/com/didispace/EventConfig.java
similarity index 100%
rename from Chapter6-1-1/src/main/java/com/didispace/EventConfig.java
rename to 1.x/Chapter6-1-1/src/main/java/com/didispace/EventConfig.java
diff --git a/Chapter6-1-1/src/main/java/com/didispace/Events.java b/1.x/Chapter6-1-1/src/main/java/com/didispace/Events.java
similarity index 100%
rename from Chapter6-1-1/src/main/java/com/didispace/Events.java
rename to 1.x/Chapter6-1-1/src/main/java/com/didispace/Events.java
diff --git a/Chapter6-1-1/src/main/java/com/didispace/StateMachineConfig.java b/1.x/Chapter6-1-1/src/main/java/com/didispace/StateMachineConfig.java
similarity index 100%
rename from Chapter6-1-1/src/main/java/com/didispace/StateMachineConfig.java
rename to 1.x/Chapter6-1-1/src/main/java/com/didispace/StateMachineConfig.java
diff --git a/Chapter6-1-1/src/main/java/com/didispace/States.java b/1.x/Chapter6-1-1/src/main/java/com/didispace/States.java
similarity index 100%
rename from Chapter6-1-1/src/main/java/com/didispace/States.java
rename to 1.x/Chapter6-1-1/src/main/java/com/didispace/States.java
diff --git a/Chapter6-1-1/src/main/resources/application.properties b/1.x/Chapter6-1-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter6-1-1/src/main/resources/application.properties
rename to 1.x/Chapter6-1-1/src/main/resources/application.properties
diff --git a/Chapter6-2-1/pom.xml b/1.x/Chapter6-2-1/pom.xml
similarity index 100%
rename from Chapter6-2-1/pom.xml
rename to 1.x/Chapter6-2-1/pom.xml
diff --git a/Chapter6-2-1/src/main/java/com/didispace/Application.java b/1.x/Chapter6-2-1/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter6-2-1/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter6-2-1/src/main/java/com/didispace/Application.java
diff --git a/Chapter6-2-1/src/main/java/com/didispace/web/HelloController.java b/1.x/Chapter6-2-1/src/main/java/com/didispace/web/HelloController.java
similarity index 100%
rename from Chapter6-2-1/src/main/java/com/didispace/web/HelloController.java
rename to 1.x/Chapter6-2-1/src/main/java/com/didispace/web/HelloController.java
diff --git a/Chapter6-2-1/src/main/resources/application.properties b/1.x/Chapter6-2-1/src/main/resources/application.properties
similarity index 100%
rename from Chapter6-2-1/src/main/resources/application.properties
rename to 1.x/Chapter6-2-1/src/main/resources/application.properties
diff --git a/Chapter6-2-1/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter6-2-1/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter6-2-1/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter6-2-1/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter9-1-1/compute-service/pom.xml b/1.x/Chapter9-1-1/compute-service/pom.xml
similarity index 100%
rename from Chapter9-1-1/compute-service/pom.xml
rename to 1.x/Chapter9-1-1/compute-service/pom.xml
diff --git a/Chapter9-1-1/compute-service/src/main/java/com/didispace/ComputeServiceApplication.java b/1.x/Chapter9-1-1/compute-service/src/main/java/com/didispace/ComputeServiceApplication.java
similarity index 100%
rename from Chapter9-1-1/compute-service/src/main/java/com/didispace/ComputeServiceApplication.java
rename to 1.x/Chapter9-1-1/compute-service/src/main/java/com/didispace/ComputeServiceApplication.java
diff --git a/Chapter9-1-1/compute-service/src/main/java/com/didispace/web/ComputeController.java b/1.x/Chapter9-1-1/compute-service/src/main/java/com/didispace/web/ComputeController.java
similarity index 100%
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rename to 1.x/Chapter9-1-1/compute-service/src/main/java/com/didispace/web/ComputeController.java
diff --git a/Chapter9-1-1/compute-service/src/main/resources/application.properties b/1.x/Chapter9-1-1/compute-service/src/main/resources/application.properties
similarity index 100%
rename from Chapter9-1-1/compute-service/src/main/resources/application.properties
rename to 1.x/Chapter9-1-1/compute-service/src/main/resources/application.properties
diff --git a/Chapter9-1-1/compute-service/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter9-1-1/compute-service/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
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rename to 1.x/Chapter9-1-1/compute-service/src/test/java/com/didispace/ApplicationTests.java
diff --git a/Chapter9-1-1/eureka-server/pom.xml b/1.x/Chapter9-1-1/eureka-server/pom.xml
similarity index 100%
rename from Chapter9-1-1/eureka-server/pom.xml
rename to 1.x/Chapter9-1-1/eureka-server/pom.xml
diff --git a/Chapter9-1-1/eureka-server/src/main/java/com/didispace/Application.java b/1.x/Chapter9-1-1/eureka-server/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter9-1-1/eureka-server/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter9-1-1/eureka-server/src/main/java/com/didispace/Application.java
diff --git a/Chapter9-1-1/eureka-server/src/main/resources/application.properties b/1.x/Chapter9-1-1/eureka-server/src/main/resources/application.properties
similarity index 100%
rename from Chapter9-1-1/eureka-server/src/main/resources/application.properties
rename to 1.x/Chapter9-1-1/eureka-server/src/main/resources/application.properties
diff --git a/Chapter9-1-2/eureka-feign/pom.xml b/1.x/Chapter9-1-2/eureka-feign/pom.xml
similarity index 100%
rename from Chapter9-1-2/eureka-feign/pom.xml
rename to 1.x/Chapter9-1-2/eureka-feign/pom.xml
diff --git a/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/FeignApplication.java b/1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/FeignApplication.java
similarity index 100%
rename from Chapter9-1-2/eureka-feign/src/main/java/com/didispace/FeignApplication.java
rename to 1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/FeignApplication.java
diff --git a/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/service/ComputeClient.java b/1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/service/ComputeClient.java
similarity index 100%
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rename to 1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/service/ComputeClient.java
diff --git a/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/web/ConsumerController.java b/1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/web/ConsumerController.java
similarity index 100%
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rename to 1.x/Chapter9-1-2/eureka-feign/src/main/java/com/didispace/web/ConsumerController.java
diff --git a/Chapter9-1-2/eureka-feign/src/main/resources/application.properties b/1.x/Chapter9-1-2/eureka-feign/src/main/resources/application.properties
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rename to 1.x/Chapter9-1-2/eureka-ribbon/pom.xml
diff --git a/Chapter9-1-2/eureka-ribbon/src/main/java/com/didispace/RibbonApplication.java b/1.x/Chapter9-1-2/eureka-ribbon/src/main/java/com/didispace/RibbonApplication.java
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diff --git a/Chapter9-1-2/eureka-ribbon/src/main/java/com/didispace/web/ConsumerController.java b/1.x/Chapter9-1-2/eureka-ribbon/src/main/java/com/didispace/web/ConsumerController.java
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diff --git a/Chapter9-1-2/eureka-ribbon/src/main/resources/application.properties b/1.x/Chapter9-1-2/eureka-ribbon/src/main/resources/application.properties
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diff --git a/Chapter9-1-3/compute-service/src/main/java/com/didispace/web/ComputeController.java b/1.x/Chapter9-1-3/compute-service/src/main/java/com/didispace/web/ComputeController.java
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similarity index 100%
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diff --git a/Chapter9-1-3/eureka-feign/src/main/java/com/didispace/FeignApplication.java b/1.x/Chapter9-1-3/eureka-feign/src/main/java/com/didispace/FeignApplication.java
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rename from Chapter9-2-2/compute-service/compute-api/pom.xml
rename to 1.x/Chapter9-2-2/compute-service/compute-api/pom.xml
diff --git a/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/ComputeService.java b/1.x/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/ComputeService.java
similarity index 100%
rename from Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/ComputeService.java
rename to 1.x/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/ComputeService.java
diff --git a/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/impl/ComputeServiceImpl.java b/1.x/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/impl/ComputeServiceImpl.java
similarity index 100%
rename from Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/impl/ComputeServiceImpl.java
rename to 1.x/Chapter9-2-2/compute-service/compute-api/src/main/java/com/didispace/service/impl/ComputeServiceImpl.java
diff --git a/Chapter9-2-2/compute-service/pom.xml b/1.x/Chapter9-2-2/compute-service/pom.xml
similarity index 100%
rename from Chapter9-2-2/compute-service/pom.xml
rename to 1.x/Chapter9-2-2/compute-service/pom.xml
diff --git a/Chapter9-2-2/consumer/pom.xml b/1.x/Chapter9-2-2/consumer/pom.xml
similarity index 100%
rename from Chapter9-2-2/consumer/pom.xml
rename to 1.x/Chapter9-2-2/consumer/pom.xml
diff --git a/Chapter9-2-2/consumer/src/main/java/com/didispace/Application.java b/1.x/Chapter9-2-2/consumer/src/main/java/com/didispace/Application.java
similarity index 100%
rename from Chapter9-2-2/consumer/src/main/java/com/didispace/Application.java
rename to 1.x/Chapter9-2-2/consumer/src/main/java/com/didispace/Application.java
diff --git a/Chapter9-2-2/consumer/src/main/resources/application.properties b/1.x/Chapter9-2-2/consumer/src/main/resources/application.properties
similarity index 100%
rename from Chapter9-2-2/consumer/src/main/resources/application.properties
rename to 1.x/Chapter9-2-2/consumer/src/main/resources/application.properties
diff --git a/Chapter9-2-2/consumer/src/main/resources/dubbo.xml b/1.x/Chapter9-2-2/consumer/src/main/resources/dubbo.xml
similarity index 100%
rename from Chapter9-2-2/consumer/src/main/resources/dubbo.xml
rename to 1.x/Chapter9-2-2/consumer/src/main/resources/dubbo.xml
diff --git a/Chapter9-2-2/consumer/src/test/java/com/didispace/ApplicationTests.java b/1.x/Chapter9-2-2/consumer/src/test/java/com/didispace/ApplicationTests.java
similarity index 100%
rename from Chapter9-2-2/consumer/src/test/java/com/didispace/ApplicationTests.java
rename to 1.x/Chapter9-2-2/consumer/src/test/java/com/didispace/ApplicationTests.java
diff --git a/1.x/README.md b/1.x/README.md
new file mode 100644
index 00000000..0fdaf52c
--- /dev/null
+++ b/1.x/README.md
@@ -0,0 +1,124 @@
+该目录下为Spring Boot 1.x版本的教程，因为版本落后，**后续不再继续更新**。
+
+推荐下面的2.x版本，还在持续更新哦！
+
+- 教程汇总（1.x版本）：[《Spring Boot基础教程》](https://blog.didispace.com/spring-boot-learning-1x/)
+- 教程汇总（2.x版本）：[《Spring Boot基础教程》](https://blog.didispace.com/spring-boot-learning-2x/)
+
+Spring Boot 2.x版本的教程可在`2.x`目录下查看。
+
+
+## 教程目录（1.x版本）
+
+本教程版本基于Spring Boot 1.3.x - 1.5.x，部分内容可能会有出入。如果您发现问题，首先看版本是否一致。如果还有问题，可以提Issue指出。
+
+如果您要学习Spring Boot 2.x版本，可以切换到2.x分支学习，本教程正在连载2.x版本的最新教程，如果您觉得内容不错，Star关注我吧！
+
+#### 快速入门
+
+- [Spring Cloud Alibaba与Spring Boot、Spring Cloud之间不得不说的版本关系](http://blog.didispace.com/spring-cloud-alibaba-version/)
+- chapter1：[基本项目构建（可作为工程脚手架），引入web模块，完成一个简单的RESTful API](http://blog.didispace.com/spring-boot-learning-1/)
+- [使用Intellij中的Spring Initializr来快速构建Spring Boot/Cloud工程](http://blog.didispace.com/spring-initializr-in-intellij/)
+
+> 提示：我们在学习Spring Boot、Spring Cloud的时候，一定要知道它们的版本关系，以避免不必要的困恼。
+
+#### 工程配置
+
+- chapter2-1-1：[配置文件详解：自定义属性、随机数、多环境配置等](http://blog.didispace.com/springbootproperties/)
+- chapter2-2-1：[2.0 新特性（一）：配置绑定全解析](http://blog.didispace.com/Spring-Boot-2-0-feature-1-relaxed-binding-2/)
+- chapter2-1-2：[2.0 新特性（二）：新增事件ApplicationStartedEvent](http://blog.didispace.com/Spring-Boot-2-0-feature-2-ApplicationStartedEvent/)
+
+#### Web开发
+
+- chapter3-1-1：[构建一个较为复杂的RESTful API以及单元测试](http://blog.didispace.com/springbootrestfulapi/)
+- chapter3-1-2：[使用Thymeleaf模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-3：[使用Freemarker模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-4：[使用Velocity模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-5：[使用Swagger2构建RESTful API](http://blog.didispace.com/springbootswagger2/)
+- chapter3-1-6：[统一异常处理](http://blog.didispace.com/springbootexception/)
+- chapter3-1-7：[使用Java 8中LocalDate等时间日期类的问题解决](http://blog.didispace.com/Spring-Boot-And-Feign-Use-localdate/)
+- chapter3-1-8：[扩展XML请求和响应的支持](http://blog.didispace.com/spring-boot-xml-httpmessageconverter)
+
+#### 数据访问
+
+- chapter3-2-1：[使用JdbcTemplate](http://blog.didispace.com/springbootdata1/)
+- chapter3-2-2：[使用Spring-data-jpa简化数据访问层（推荐）](http://blog.didispace.com/springbootdata2/)
+- chapter3-2-3：[多数据源配置（一）：JdbcTemplate](http://blog.didispace.com/springbootmultidatasource/)
+- chapter3-2-4：[多数据源配置（二）：Spring-data-jpa](http://blog.didispace.com/springbootmultidatasource/)
+- chapter3-2-5：[使用NoSQL数据库（一）：Redis](http://blog.didispace.com/springbootredis/)
+- chapter3-2-6：[使用NoSQL数据库（二）：MongoDB](http://blog.didispace.com/springbootmongodb/)
+- chapter3-2-7：[整合MyBatis](http://blog.didispace.com/springbootmybatis/)
+- chapter3-2-8：[MyBatis注解配置详解](http://blog.didispace.com/mybatisinfo/)
+- chapter3-2-9：[使用Flyway来管理数据库版本](http://blog.didispace.com/spring-boot-flyway-db-version/)
+- chapter3-2-10：[使用LDAP来统一管理用户信息](http://blog.didispace.com/spring-boot-ldap-user/)
+- chapter3-2-11：[Spring Boot中增强对MongoDB的配置（连接池等）](http://blog.didispace.com/springbootmongodb-plus/)
+
+#### 事务管理
+
+- chapter3-3-1：[使用事务管理](http://blog.didispace.com/springboottransactional/)
+- chapter3-3-2：[分布式事务（未完成）]
+
+#### 其他内容
+
+- chapter4-1-1：[使用@Scheduled创建定时任务](http://blog.didispace.com/springbootscheduled/)
+- chapter4-1-2：[使用@Async实现异步调用](http://blog.didispace.com/springbootasync/)
+- chapter4-1-3：[使用@Async实现异步调用：自定义线程池](http://blog.didispace.com/springbootasync-2/)
+- chapter4-1-4：[使用@Async实现异步调用：资源优雅关闭](http://blog.didispace.com/springbootasync-3/)
+- chapter4-1-5：[使用@Async实现异步调用：使用Future以及定义超时](http://blog.didispace.com/springbootasync-4/)
+
+#### 日志管理
+
+- chapter4-2-1：[默认日志的配置](http://blog.didispace.com/springbootlog/)
+- chapter4-2-2：[使用log4j记录日志](http://blog.didispace.com/springbootlog4j/)
+- chapter4-2-3：[对log4j进行多环境不同日志级别的控制](http://blog.didispace.com/springbootlog4jmuilt/)
+- chapter4-2-4：[使用AOP统一处理Web请求日志](http://blog.didispace.com/springbootaoplog/)
+- chapter4-2-5：[使用log4j记录日志到MongoDB](http://blog.didispace.com/springbootlog4jmongodb/)
+- chapter4-2-6：[Spring Boot 1.5.x新特性：动态修改日志级别](http://blog.didispace.com/spring-boot-1-5-x-feature-1/)]
+
+#### 安全管理
+
+- chapter4-3-1：[使用Spring Security](http://blog.didispace.com/springbootsecurity/)
+- chapter4-3-2：[使用Spring Session（未完成）]
+
+#### 缓存支持
+
+- chapter4-4-1：[注解配置与EhCache使用](http://blog.didispace.com/springbootcache1/)
+- chapter4-4-2：[使用Redis做集中式缓存](http://blog.didispace.com/springbootcache2/)
+
+#### 邮件发送
+
+- chapter4-5-1：[实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件](http://blog.didispace.com/springbootmailsender/)
+
+#### 消息服务
+
+- chapter5-1-1：[JMS（未完成）]
+- chapter5-2-1：[Spring Boot中使用RabbitMQ](http://blog.didispace.com/spring-boot-rabbitmq/)
+
+#### 其他功能
+
+- chapter6-1-1：[使用Spring StateMachine框架实现状态机](http://blog.didispace.com/spring-statemachine/)
+- [Spring Boot Actuator监控端点小结](http://blog.didispace.com/spring-boot-actuator-1/)
+- [在传统Spring应用中使用spring-boot-actuator模块提供监控端点](http://blog.didispace.com/spring-boot-actuator-without-boot/)
+- [Spring Boot应用的后台运行配置](http://blog.didispace.com/spring-boot-run-backend/)
+- [Spring Boot自定义Banner](http://blog.didispace.com/spring-boot-banner/)
+
+#### Dubbo进行服务治理
+
+- chapter9-2-1：[Spring Boot中使用Dubbo进行服务治理](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-1)
+- chapter9-2-2：[Spring Boot与Dubbo中管理服务依赖](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-2)
+
+## 推荐内容
+
+- [我的博客](http://blog.didispace.com)：分享平时学习和实践过的技术内容
+- [知识星球](https://t.xiaomiquan.com/zfEiY3v)：聊聊技术人的斜杠生活
+- [GitHub](https://github.com/dyc87112/SpringBoot-Learning)：Star支持一下呗
+- [Gitee](https://gitee.com/didispace/SpringBoot-Learning)：Star支持一下呗
+- [Spring问答社区](http://www.spring4all.com/)：如果您有什么问题，可以去这里发帖
+- [Spring Boot基础教程](http://blog.didispace.com/Spring-Boot%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网Star最多的免费Spring Boot基础教程
+- [Spring Cloud基础教程](http://blog.didispace.com/Spring-Cloud%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网最早最全的免费Spring Cloud基础教程
+
+## 我的公众号
+
+<img src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/weixin.jpg?raw=true" style="width:150px;height:150px;" />
+
+
diff --git a/1.x/README_zh.md b/1.x/README_zh.md
new file mode 100644
index 00000000..0fdaf52c
--- /dev/null
+++ b/1.x/README_zh.md
@@ -0,0 +1,124 @@
+该目录下为Spring Boot 1.x版本的教程，因为版本落后，**后续不再继续更新**。
+
+推荐下面的2.x版本，还在持续更新哦！
+
+- 教程汇总（1.x版本）：[《Spring Boot基础教程》](https://blog.didispace.com/spring-boot-learning-1x/)
+- 教程汇总（2.x版本）：[《Spring Boot基础教程》](https://blog.didispace.com/spring-boot-learning-2x/)
+
+Spring Boot 2.x版本的教程可在`2.x`目录下查看。
+
+
+## 教程目录（1.x版本）
+
+本教程版本基于Spring Boot 1.3.x - 1.5.x，部分内容可能会有出入。如果您发现问题，首先看版本是否一致。如果还有问题，可以提Issue指出。
+
+如果您要学习Spring Boot 2.x版本，可以切换到2.x分支学习，本教程正在连载2.x版本的最新教程，如果您觉得内容不错，Star关注我吧！
+
+#### 快速入门
+
+- [Spring Cloud Alibaba与Spring Boot、Spring Cloud之间不得不说的版本关系](http://blog.didispace.com/spring-cloud-alibaba-version/)
+- chapter1：[基本项目构建（可作为工程脚手架），引入web模块，完成一个简单的RESTful API](http://blog.didispace.com/spring-boot-learning-1/)
+- [使用Intellij中的Spring Initializr来快速构建Spring Boot/Cloud工程](http://blog.didispace.com/spring-initializr-in-intellij/)
+
+> 提示：我们在学习Spring Boot、Spring Cloud的时候，一定要知道它们的版本关系，以避免不必要的困恼。
+
+#### 工程配置
+
+- chapter2-1-1：[配置文件详解：自定义属性、随机数、多环境配置等](http://blog.didispace.com/springbootproperties/)
+- chapter2-2-1：[2.0 新特性（一）：配置绑定全解析](http://blog.didispace.com/Spring-Boot-2-0-feature-1-relaxed-binding-2/)
+- chapter2-1-2：[2.0 新特性（二）：新增事件ApplicationStartedEvent](http://blog.didispace.com/Spring-Boot-2-0-feature-2-ApplicationStartedEvent/)
+
+#### Web开发
+
+- chapter3-1-1：[构建一个较为复杂的RESTful API以及单元测试](http://blog.didispace.com/springbootrestfulapi/)
+- chapter3-1-2：[使用Thymeleaf模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-3：[使用Freemarker模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-4：[使用Velocity模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
+- chapter3-1-5：[使用Swagger2构建RESTful API](http://blog.didispace.com/springbootswagger2/)
+- chapter3-1-6：[统一异常处理](http://blog.didispace.com/springbootexception/)
+- chapter3-1-7：[使用Java 8中LocalDate等时间日期类的问题解决](http://blog.didispace.com/Spring-Boot-And-Feign-Use-localdate/)
+- chapter3-1-8：[扩展XML请求和响应的支持](http://blog.didispace.com/spring-boot-xml-httpmessageconverter)
+
+#### 数据访问
+
+- chapter3-2-1：[使用JdbcTemplate](http://blog.didispace.com/springbootdata1/)
+- chapter3-2-2：[使用Spring-data-jpa简化数据访问层（推荐）](http://blog.didispace.com/springbootdata2/)
+- chapter3-2-3：[多数据源配置（一）：JdbcTemplate](http://blog.didispace.com/springbootmultidatasource/)
+- chapter3-2-4：[多数据源配置（二）：Spring-data-jpa](http://blog.didispace.com/springbootmultidatasource/)
+- chapter3-2-5：[使用NoSQL数据库（一）：Redis](http://blog.didispace.com/springbootredis/)
+- chapter3-2-6：[使用NoSQL数据库（二）：MongoDB](http://blog.didispace.com/springbootmongodb/)
+- chapter3-2-7：[整合MyBatis](http://blog.didispace.com/springbootmybatis/)
+- chapter3-2-8：[MyBatis注解配置详解](http://blog.didispace.com/mybatisinfo/)
+- chapter3-2-9：[使用Flyway来管理数据库版本](http://blog.didispace.com/spring-boot-flyway-db-version/)
+- chapter3-2-10：[使用LDAP来统一管理用户信息](http://blog.didispace.com/spring-boot-ldap-user/)
+- chapter3-2-11：[Spring Boot中增强对MongoDB的配置（连接池等）](http://blog.didispace.com/springbootmongodb-plus/)
+
+#### 事务管理
+
+- chapter3-3-1：[使用事务管理](http://blog.didispace.com/springboottransactional/)
+- chapter3-3-2：[分布式事务（未完成）]
+
+#### 其他内容
+
+- chapter4-1-1：[使用@Scheduled创建定时任务](http://blog.didispace.com/springbootscheduled/)
+- chapter4-1-2：[使用@Async实现异步调用](http://blog.didispace.com/springbootasync/)
+- chapter4-1-3：[使用@Async实现异步调用：自定义线程池](http://blog.didispace.com/springbootasync-2/)
+- chapter4-1-4：[使用@Async实现异步调用：资源优雅关闭](http://blog.didispace.com/springbootasync-3/)
+- chapter4-1-5：[使用@Async实现异步调用：使用Future以及定义超时](http://blog.didispace.com/springbootasync-4/)
+
+#### 日志管理
+
+- chapter4-2-1：[默认日志的配置](http://blog.didispace.com/springbootlog/)
+- chapter4-2-2：[使用log4j记录日志](http://blog.didispace.com/springbootlog4j/)
+- chapter4-2-3：[对log4j进行多环境不同日志级别的控制](http://blog.didispace.com/springbootlog4jmuilt/)
+- chapter4-2-4：[使用AOP统一处理Web请求日志](http://blog.didispace.com/springbootaoplog/)
+- chapter4-2-5：[使用log4j记录日志到MongoDB](http://blog.didispace.com/springbootlog4jmongodb/)
+- chapter4-2-6：[Spring Boot 1.5.x新特性：动态修改日志级别](http://blog.didispace.com/spring-boot-1-5-x-feature-1/)]
+
+#### 安全管理
+
+- chapter4-3-1：[使用Spring Security](http://blog.didispace.com/springbootsecurity/)
+- chapter4-3-2：[使用Spring Session（未完成）]
+
+#### 缓存支持
+
+- chapter4-4-1：[注解配置与EhCache使用](http://blog.didispace.com/springbootcache1/)
+- chapter4-4-2：[使用Redis做集中式缓存](http://blog.didispace.com/springbootcache2/)
+
+#### 邮件发送
+
+- chapter4-5-1：[实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件](http://blog.didispace.com/springbootmailsender/)
+
+#### 消息服务
+
+- chapter5-1-1：[JMS（未完成）]
+- chapter5-2-1：[Spring Boot中使用RabbitMQ](http://blog.didispace.com/spring-boot-rabbitmq/)
+
+#### 其他功能
+
+- chapter6-1-1：[使用Spring StateMachine框架实现状态机](http://blog.didispace.com/spring-statemachine/)
+- [Spring Boot Actuator监控端点小结](http://blog.didispace.com/spring-boot-actuator-1/)
+- [在传统Spring应用中使用spring-boot-actuator模块提供监控端点](http://blog.didispace.com/spring-boot-actuator-without-boot/)
+- [Spring Boot应用的后台运行配置](http://blog.didispace.com/spring-boot-run-backend/)
+- [Spring Boot自定义Banner](http://blog.didispace.com/spring-boot-banner/)
+
+#### Dubbo进行服务治理
+
+- chapter9-2-1：[Spring Boot中使用Dubbo进行服务治理](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-1)
+- chapter9-2-2：[Spring Boot与Dubbo中管理服务依赖](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-2)
+
+## 推荐内容
+
+- [我的博客](http://blog.didispace.com)：分享平时学习和实践过的技术内容
+- [知识星球](https://t.xiaomiquan.com/zfEiY3v)：聊聊技术人的斜杠生活
+- [GitHub](https://github.com/dyc87112/SpringBoot-Learning)：Star支持一下呗
+- [Gitee](https://gitee.com/didispace/SpringBoot-Learning)：Star支持一下呗
+- [Spring问答社区](http://www.spring4all.com/)：如果您有什么问题，可以去这里发帖
+- [Spring Boot基础教程](http://blog.didispace.com/Spring-Boot%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网Star最多的免费Spring Boot基础教程
+- [Spring Cloud基础教程](http://blog.didispace.com/Spring-Cloud%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网最早最全的免费Spring Cloud基础教程
+
+## 我的公众号
+
+<img src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/weixin.jpg?raw=true" style="width:150px;height:150px;" />
+
+
diff --git a/2.x/README.md b/2.x/README.md
new file mode 100644
index 00000000..af580d69
--- /dev/null
+++ b/2.x/README.md
@@ -0,0 +1,184 @@
+# Spring Boot基础教程（2.x版本）
+
+本项目内容为[《Spring Boot基础教程》](http://blog.didispace.com/spring-boot-learning-2x/)的程序样例。
+
+**专题目标**：打造全网内容最全，比收费教程更好的Spring Boot免费教程！
+
+**加入社群**：如果你正在学习Spring Boot，不妨加入我们的[Spring技术交流群](https://blog.didispace.com/join-group-spring/index.html) ，一起成长
+
+**Spring社区**：如果您在学习过程中碰到问题，可以访问[SpringForAll社区](http://spring4all.com)，描述你的问题，我们会尽快给你答复。当然，如果你想分享你的学习经验，也可以在这里发表你的文章
+
+**如何支持**：
+
+1. 关注我的公众号”**程序猿DD**“
+2. 点个`Star`并`Follow`我
+3. 把该仓库分享给更多的朋友
+
+## 教程目录（2.x版本）
+
+本教程内容持续更新连载中！**Star关注**支持一下，随时获得更新信息！
+
+### 快速入门
+
+- [Spring Boot 2.x基础教程：版本关系](http://blog.didispace.com/spring-cloud-alibaba-version/)
+- [Spring Boot 2.x基础教程：快速入门](http://blog.didispace.com/spring-boot-learning-21-1-1/)
+- [Spring Boot 2.x基础教程：工程结构推荐](http://blog.didispace.com/spring-boot-learning-21-1-2/)
+
+### 配置详解
+
+- [Spring Boot 2.x基础教程：配置文件详解](http://blog.didispace.com/spring-boot-learning-21-1-3/)
+- [Spring Boot 2.x基础教程：2.4版本前后的多环境配置变化](http://blog.didispace.com/spring-boot-learning-24-1-4/)
+- [Spring Boot 2.x基础教程：2.4版本前后的分组配置变化](http://blog.didispace.com/spring-boot-learning-24-1-5/)
+- [Spring Boot 2.x基础教程：配置元数据的应用 ](http://blog.didispace.com/spring-boot-learning-24-1-6/)
+- [Spring Boot 2.x基础教程：加密配置中的敏感信息](http://blog.didispace.com/spring-boot-learning-2-1-5/)
+
+### API开发
+
+- [Spring Boot 2.x基础教程：构建RESTful API与单元测试](http://blog.didispace.com/spring-boot-learning-21-2-1/)
+- [Spring Boot 2.x基础教程：使用Swagger2构建强大的API文档](http://blog.didispace.com/spring-boot-learning-21-2-2/)
+- [Spring Boot 2.x基础教程：JSR-303实现请求参数校验](http://blog.didispace.com/spring-boot-learning-21-2-3/)
+- [Spring Boot 2.x基础教程：Swagger接口分类与各元素排序问题详解](http://blog.didispace.com/spring-boot-learning-21-2-4/)
+- [Spring Boot 2.x基础教程：Swagger静态文档的生成](http://blog.didispace.com/spring-boot-learning-21-2-5/)
+- [Spring Boot 2.x基础教程：找回启动日志中的请求路径列表](http://blog.didispace.com/spring-boot-learning-21-2-6/)
+- [Spring Boot 2.x基础教程：使用SpringFox 3生成Swagger文档](http://blog.didispace.com/spring-boot-learning-21-2-7/)
+- [Spring Boot 2.x基础教程：如何扩展XML格式的请求和响应](http://blog.didispace.com/spring-boot-learning-21-2-8/)
+
+### 数据访问
+
+**关系型数据库**
+
+- [Spring Boot 2.x基础教程：使用JdbcTemplate访问MySQL数据库](http://blog.didispace.com/spring-boot-learning-21-3-1/)
+- [Spring Boot 2.x基础教程：默认数据源Hikari的配置详解](http://blog.didispace.com/spring-boot-learning-21-3-2/)
+- [Spring Boot 2.x基础教程：使用国产数据库连接池Druid](http://blog.didispace.com/spring-boot-learning-21-3-3/)
+- [Spring Boot 2.x基础教程：使用Spring Data JPA访问MySQL](http://blog.didispace.com/spring-boot-learning-21-3-4/)
+- [Spring Boot 2.x基础教程：使用MyBatis访问MySQL](http://blog.didispace.com/spring-boot-learning-21-3-5/)
+- [Spring Boot 2.x基础教程：使用MyBatis的XML配置方式](http://blog.didispace.com/spring-boot-learning-21-3-6/)
+- [Spring Boot 2.x基础教程：JdbcTemplate的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-7/)
+- [Spring Boot 2.x基础教程：Spring Data JPA的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-8/)
+- [Spring Boot 2.x基础教程：MyBatis的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-9/)
+- [Spring Boot 2.x基础教程：事务管理入门](http://blog.didispace.com/spring-boot-learning-21-3-10/)
+- [Spring Boot 2.x基础教程：使用Flyway管理数据库版本](http://blog.didispace.com/spring-boot-learning-24-3-11/)
+- [Spring Boot 2.x基础教程：使用JTA实现多数据源的事务管理](http://blog.didispace.com/spring-boot-learning-24-3-12/)
+- [Spring Boot 2.x基础教程：2.5版本后数据脚本初始化的变动](http://blog.didispace.com/spring-boot-learning-25-3-13/)
+
+**加速利器：各种缓存的使用**
+
+- [Spring Boot 2.x基础教程：进程内缓存的使用与Cache注解详解](http://blog.didispace.com/spring-boot-learning-21-5-1/)
+- [Spring Boot 2.x基础教程：EhCache缓存的使用](http://blog.didispace.com/spring-boot-learning-21-5-2/)
+- [Spring Boot 2.x基础教程：使用EhCache缓存集群](http://blog.didispace.com/spring-boot-learning-21-5-3/)
+- [Spring Boot 2.x基础教程：使用集中式缓存Redis](http://blog.didispace.com/spring-boot-learning-21-5-4/)
+- [Spring Boot 2.x基础教程：使用Redis的发布订阅功能](http://blog.didispace.com/spring-boot-learning-25-5-5/)
+
+**其他常见存储的使用**
+
+- [Spring Boot 2.x基础教程：使用MongoDB](http://blog.didispace.com/spring-boot-learning-24-6-1/)
+- [Spring Boot 2.x基础教程：使用LDAP来管理用户与组织数据](http://blog.didispace.com/spring-boot-learning-24-6-2/)
+- [Spring Boot 2.x基础教程：使用时序数据库InfluxDB](http://blog.didispace.com/spring-boot-learning-2-6-3/)
+- [Spring Boot 2.x基础教程：使用PostgreSQL](http://blog.didispace.com/spring-boot-learning-2-6-4/)
+
+### Web开发
+
+- [Spring Boot 2.x基础教程：使用 Thymeleaf开发Web页面](http://blog.didispace.com/spring-boot-learning-21-4-1/)
+- [Spring Boot 2.x基础教程：使用 ECharts 绘制各种华丽的数据图表](http://blog.didispace.com/spring-boot-learning-21-4-2/)
+- [Spring Boot 2.x基础教程：实现文件上传](http://blog.didispace.com/spring-boot-learning-21-4-3/)
+- [Spring Boot 2.x基础教程：多个文件的上传](http://blog.didispace.com/spring-boot-learning-21-4-4/)
+- [Spring Boot 2.x基础教程：文件上传的单元测试怎么写](http://blog.didispace.com/spring-boot-learning-21-4-5/)
+
+### 任务管理
+
+**定时任务**
+
+- [Spring Boot 2.x基础教程：使用@Scheduled实现定时任务](https://blog.didispace.com/spring-boot-learning-2-7-1)
+- [Spring Boot 2.x基础教程：使用Elastic Job实现定时任务](https://blog.didispace.com/spring-boot-learning-2-7-2)
+- [Spring Boot 2.x基础教程：使用Elastic Job的分片配置提高执行效率](https://blog.didispace.com/spring-boot-learning-2-7-3)
+- [Spring Boot 2.x基础教程：使用Elastic Job的namespace防止任务名冲突](https://blog.didispace.com/spring-boot-learning-2-7-4)
+
+**异步任务**
+
+- [Spring Boot 2.x基础教程：使用@Async实现异步任务](https://blog.didispace.com/spring-boot-learning-2-7-5)
+- [Spring Boot 2.x基础教程：配置@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-6)
+- [Spring Boot 2.x基础教程：如何隔离@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-7)
+- [Spring Boot 2.x基础教程：配置线程池的拒绝策略](https://blog.didispace.com/spring-boot-learning-2-7-8)
+
+### 日志管理
+
+- [Spring Boot 2.x基础教程：默认日志管理与Logback配置详解](https://blog.didispace.com/spring-boot-learning-2-8-1)
+- [Spring Boot 2.x基础教程：使用log4j2记录日志](https://blog.didispace.com/spring-boot-learning-2-8-2)
+- [Spring Boot 2.x基础教程：使用tinylog记录日志](https://blog.didispace.com/spring-boot-learning-2-8-3)
+
+
+### 其他内容
+
+- [Spring Boot自定义启动Banner](http://blog.didispace.com/spring-boot-banner/)
+- [实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件](http://blog.didispace.com/springbootmailsender/)
+- [使用Spring StateMachine框架实现状态机](http://blog.didispace.com/spring-statemachine/)
+- [Spring Boot应用的后台运行配置](http://blog.didispace.com/spring-boot-run-backend/)
+
+## 进阶与深入
+
+- [什么时候不要使用@Autowire](http://blog.didispace.com/when-not-use-autowire-in-spring-boot/)
+- [为什么加了@Transactional注解，事务没有回滚？](http://blog.didispace.com/transactional-not-rollback/)
+- [为什么启动时候API路径都没了？](http://blog.didispace.com/spring-boot-learning-21-2-6/)
+- [使用Java 8中LocalDate等时间日期类的问题解决](http://blog.didispace.com/Spring-Boot-And-Feign-Use-localdate/)
+- [Request header is too large 如何解决？](https://blog.didispace.com/request-header-is-too-large/)
+- [Spring Boot自动化配置的利弊及解决之道](http://blog.didispace.com/spring-boot-disable-autoconfig/)
+
+## 版本资讯
+
+### 1.x到2.x
+
+- [Spring Boot 2.0 正式发布，升还是不升呢？](http://blog.didispace.com/spring-boot-2-release/)
+- [Spring Boot 2.0 新特性和发展方向](http://blog.didispace.com/Spring-Boot-2-0-%E6%96%B0%E7%89%B9%E6%80%A7%E5%92%8C%E5%8F%91%E5%B1%95%E6%96%B9%E5%90%91/)
+- [Spring Boot 2.0 与 Java 9](http://blog.didispace.com/Spring-Boot-2.0%E4%B8%8EJava-9/)
+- [Spring Boot 2.0 新特性（一）：配置绑定 2.0 全解析](http://blog.didispace.com/Spring-Boot-2-0-feature-1-relaxed-binding-2/)
+- [Spring Boot 2.0 新特性（二）：新增事件ApplicationStartedEvent](http://blog.didispace.com/Spring-Boot-2-0-feature-2-ApplicationStartedEvent/)
+
+更多关于2.x的版本信息可查看[点击查看](http://www.springcloud.com.cn/)
+
+## 我的公众号
+
+<img src="https://blog.didispace.com/css/images/weixin.jpg" style="width:150px;height:150px;" />
+
+## 推荐我的书
+
+![Spring Boot微服务实战](https://git.oschina.net/uploads/images/2017/0416/233656_dd3bce94_437188.png)
+
+## 特别赞助商
+
+<table>
+      <tbody>
+        <tr>
+          <td align="center" valign="middle">
+             <a href="https://start.aliyun.com/" target="_blank">
+               <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/001.jpg?raw=true">
+             </a>
+          </td>
+          <td align="center" valign="middle">
+            <a href="http://gk.link/a/103EK" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/002.jpg?raw=true">
+            </a>
+          </td>  
+          <td align="center" valign="middle">
+             <a href="https://openwrite.cn/?from=didi-springcloud" target="_blank">
+               <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/003.jpg?raw=true">
+             </a>
+          </td>          
+        </tr>
+        <tr>
+          <td align="center" valign="middle">
+            <a href="https://www.aliyun.com/minisite/goods?userCode=wxfqkr0o&share_source=copy_link" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/004.jpg?raw=true">
+            </a>
+          </td>  
+          <td align="center" valign="middle">
+            <a href="https://curl.qcloud.com/M5wV9Ylj" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/005.jpg?raw=true">
+            </a>
+          </td> 
+          <td align="center" valign="middle">
+          </td>
+        </tr>
+      </tbody>
+</table>
+
+> 如果您也想赞助支持并出现在上表中的话，可以通过邮件联系我：`didi@didispace.com`
\ No newline at end of file
diff --git a/2.x/README_zh.md b/2.x/README_zh.md
new file mode 100644
index 00000000..70612143
--- /dev/null
+++ b/2.x/README_zh.md
@@ -0,0 +1,202 @@
+# Spring Boot基础教程（2.x版本）
+
+本项目内容为[《Spring Boot基础教程》](http://blog.didispace.com/spring-boot-learning-2x/)的程序样例。
+
+**专题目标**：打造全网内容最全，比收费教程更好的Spring Boot免费教程！
+
+**加入社群**：如果你正在学习Spring Boot，不妨加入我们的[Spring技术交流群](https://blog.didispace.com/join-group-spring/index.html) ，一起成长
+
+**Spring社区**：如果您在学习过程中碰到问题，可以访问[SpringForAll社区](http://spring4all.com)，描述你的问题，我们会尽快给你答复。当然，如果你想分享你的学习经验，也可以在这里发表你的文章
+
+**如何支持**：
+
+1. 关注我的公众号”**程序猿DD**“
+2. 点个`Star`并`Follow`我
+3. 把该仓库分享给更多的朋友
+
+> **关注公众号：“程序猿DD”**，领取我整理的免费学习资料。<br>
+
+## 教程目录（2.x版本）
+
+本教程内容持续更新连载中！**Star关注**支持一下，随时获得更新信息！
+
+### 快速入门
+
+- [Spring Boot 2.x基础教程：版本关系](http://blog.didispace.com/spring-cloud-alibaba-version/)
+- [Spring Boot 2.x基础教程：快速入门](http://blog.didispace.com/spring-boot-learning-21-1-1/)
+- [Spring Boot 2.x基础教程：工程结构推荐](http://blog.didispace.com/spring-boot-learning-21-1-2/)
+
+### 配置详解
+
+- [Spring Boot 2.x基础教程：配置文件详解](http://blog.didispace.com/spring-boot-learning-21-1-3/)
+- [Spring Boot 2.x基础教程：2.4版本前后的多环境配置变化](http://blog.didispace.com/spring-boot-learning-24-1-4/)
+- [Spring Boot 2.x基础教程：2.4版本前后的分组配置变化](http://blog.didispace.com/spring-boot-learning-24-1-5/)
+- [Spring Boot 2.x基础教程：配置元数据的应用 ](http://blog.didispace.com/spring-boot-learning-24-1-6/)
+- [Spring Boot 2.x基础教程：加密配置中的敏感信息](http://blog.didispace.com/spring-boot-learning-2-1-5/)
+
+### API开发
+
+- [Spring Boot 2.x基础教程：构建RESTful API与单元测试](http://blog.didispace.com/spring-boot-learning-21-2-1/)
+- [Spring Boot 2.x基础教程：使用Swagger2构建强大的API文档](http://blog.didispace.com/spring-boot-learning-21-2-2/)
+- [Spring Boot 2.x基础教程：JSR-303实现请求参数校验](http://blog.didispace.com/spring-boot-learning-21-2-3/)
+- [Spring Boot 2.x基础教程：Swagger接口分类与各元素排序问题详解](http://blog.didispace.com/spring-boot-learning-21-2-4/)
+- [Spring Boot 2.x基础教程：Swagger静态文档的生成](http://blog.didispace.com/spring-boot-learning-21-2-5/)
+- [Spring Boot 2.x基础教程：找回启动日志中的请求路径列表](http://blog.didispace.com/spring-boot-learning-21-2-6/)
+- [Spring Boot 2.x基础教程：使用SpringFox 3生成Swagger文档](http://blog.didispace.com/spring-boot-learning-21-2-7/)
+- [Spring Boot 2.x基础教程：如何扩展XML格式的请求和响应](http://blog.didispace.com/spring-boot-learning-21-2-8/)
+
+### 数据访问
+
+**关系型数据库**
+
+- [Spring Boot 2.x基础教程：使用JdbcTemplate访问MySQL数据库](http://blog.didispace.com/spring-boot-learning-21-3-1/)
+- [Spring Boot 2.x基础教程：默认数据源Hikari的配置详解](http://blog.didispace.com/spring-boot-learning-21-3-2/)
+- [Spring Boot 2.x基础教程：使用国产数据库连接池Druid](http://blog.didispace.com/spring-boot-learning-21-3-3/)
+- [Spring Boot 2.x基础教程：使用Spring Data JPA访问MySQL](http://blog.didispace.com/spring-boot-learning-21-3-4/)
+- [Spring Boot 2.x基础教程：使用MyBatis访问MySQL](http://blog.didispace.com/spring-boot-learning-21-3-5/)
+- [Spring Boot 2.x基础教程：使用MyBatis的XML配置方式](http://blog.didispace.com/spring-boot-learning-21-3-6/)
+- [Spring Boot 2.x基础教程：JdbcTemplate的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-7/)
+- [Spring Boot 2.x基础教程：Spring Data JPA的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-8/)
+- [Spring Boot 2.x基础教程：MyBatis的多数据源配置](http://blog.didispace.com/spring-boot-learning-21-3-9/)
+- [Spring Boot 2.x基础教程：事务管理入门](http://blog.didispace.com/spring-boot-learning-21-3-10/)
+- [Spring Boot 2.x基础教程：使用Flyway管理数据库版本](http://blog.didispace.com/spring-boot-learning-24-3-11/)
+- [Spring Boot 2.x基础教程：使用JTA实现多数据源的事务管理](http://blog.didispace.com/spring-boot-learning-24-3-12/)
+- [Spring Boot 2.x基础教程：2.5版本后数据脚本初始化的变动](http://blog.didispace.com/spring-boot-learning-25-3-13/)
+
+**加速利器：各种缓存的使用**
+
+- [Spring Boot 2.x基础教程：进程内缓存的使用与Cache注解详解](http://blog.didispace.com/spring-boot-learning-21-5-1/)
+- [Spring Boot 2.x基础教程：EhCache缓存的使用](http://blog.didispace.com/spring-boot-learning-21-5-2/)
+- [Spring Boot 2.x基础教程：使用EhCache缓存集群](http://blog.didispace.com/spring-boot-learning-21-5-3/)
+- [Spring Boot 2.x基础教程：使用集中式缓存Redis](http://blog.didispace.com/spring-boot-learning-21-5-4/)
+- [Spring Boot 2.x基础教程：使用Redis的发布订阅功能](http://blog.didispace.com/spring-boot-learning-25-5-5/)
+
+**其他常见存储的使用**
+
+- [Spring Boot 2.x基础教程：使用MongoDB](http://blog.didispace.com/spring-boot-learning-24-6-1/)
+- [Spring Boot 2.x基础教程：使用LDAP来管理用户与组织数据](http://blog.didispace.com/spring-boot-learning-24-6-2/)
+- [Spring Boot 2.x基础教程：使用时序数据库InfluxDB](http://blog.didispace.com/spring-boot-learning-2-6-3/)
+- [Spring Boot 2.x基础教程：使用PostgreSQL](http://blog.didispace.com/spring-boot-learning-2-6-4/)
+
+### Web开发
+
+- [Spring Boot 2.x基础教程：使用 Thymeleaf开发Web页面](http://blog.didispace.com/spring-boot-learning-21-4-1/)
+- [Spring Boot 2.x基础教程：使用 ECharts 绘制各种华丽的数据图表](http://blog.didispace.com/spring-boot-learning-21-4-2/)
+- [Spring Boot 2.x基础教程：实现文件上传](http://blog.didispace.com/spring-boot-learning-21-4-3/)
+- [Spring Boot 2.x基础教程：多个文件的上传](http://blog.didispace.com/spring-boot-learning-21-4-4/)
+- [Spring Boot 2.x基础教程：文件上传的单元测试怎么写](http://blog.didispace.com/spring-boot-learning-21-4-5/)
+
+### 任务管理
+
+**定时任务**
+
+- [Spring Boot 2.x基础教程：使用@Scheduled实现定时任务](https://blog.didispace.com/spring-boot-learning-2-7-1)
+- [Spring Boot 2.x基础教程：使用Elastic Job实现定时任务](https://blog.didispace.com/spring-boot-learning-2-7-2)
+- [Spring Boot 2.x基础教程：使用Elastic Job的分片配置提高执行效率](https://blog.didispace.com/spring-boot-learning-2-7-3)
+- [Spring Boot 2.x基础教程：使用Elastic Job的namespace防止任务名冲突](https://blog.didispace.com/spring-boot-learning-2-7-4)
+
+**异步任务**
+
+- [Spring Boot 2.x基础教程：使用@Async实现异步任务](https://blog.didispace.com/spring-boot-learning-2-7-5)
+- [Spring Boot 2.x基础教程：配置@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-6)
+- [Spring Boot 2.x基础教程：如何隔离@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-7)
+- [Spring Boot 2.x基础教程：配置线程池的拒绝策略](https://blog.didispace.com/spring-boot-learning-2-7-8)
+
+### 日志管理
+
+- [Spring Boot 2.x基础教程：默认日志管理与Logback配置详解](https://blog.didispace.com/spring-boot-learning-2-8-1)
+- [Spring Boot 2.x基础教程：使用log4j2记录日志](https://blog.didispace.com/spring-boot-learning-2-8-2)
+- [Spring Boot 2.x基础教程：使用tinylog记录日志](https://blog.didispace.com/spring-boot-learning-2-8-3)
+
+### 其他内容
+
+- [Spring Boot自定义启动Banner](http://blog.didispace.com/spring-boot-banner/)
+- [实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件](http://blog.didispace.com/springbootmailsender/)
+- [使用Spring StateMachine框架实现状态机](http://blog.didispace.com/spring-statemachine/)
+- [Spring Boot应用的后台运行配置](http://blog.didispace.com/spring-boot-run-backend/)
+
+
+## 进阶与深入
+
+- [什么时候不要使用@Autowire](http://blog.didispace.com/when-not-use-autowire-in-spring-boot/)
+- [为什么加了@Transactional注解，事务没有回滚？](http://blog.didispace.com/transactional-not-rollback/)
+- [为什么启动时候API路径都没了？](http://blog.didispace.com/spring-boot-learning-21-2-6/)
+- [使用Java 8中LocalDate等时间日期类的问题解决](http://blog.didispace.com/Spring-Boot-And-Feign-Use-localdate/)
+- [Request header is too large 如何解决？](https://blog.didispace.com/request-header-is-too-large/)
+- [Spring Boot自动化配置的利弊及解决之道](http://blog.didispace.com/spring-boot-disable-autoconfig/)
+
+## 版本资讯
+
+### 1.x到2.x
+
+- [Spring Boot 2.0 正式发布，升还是不升呢？](http://blog.didispace.com/spring-boot-2-release/)
+- [Spring Boot 2.0 新特性和发展方向](http://blog.didispace.com/Spring-Boot-2-0-%E6%96%B0%E7%89%B9%E6%80%A7%E5%92%8C%E5%8F%91%E5%B1%95%E6%96%B9%E5%90%91/)
+- [Spring Boot 2.0 与 Java 9](http://blog.didispace.com/Spring-Boot-2.0%E4%B8%8EJava-9/)
+- [Spring Boot 2.0 新特性（一）：配置绑定 2.0 全解析](http://blog.didispace.com/Spring-Boot-2-0-feature-1-relaxed-binding-2/)
+- [Spring Boot 2.0 新特性（二）：新增事件ApplicationStartedEvent](http://blog.didispace.com/Spring-Boot-2-0-feature-2-ApplicationStartedEvent/)
+
+### 2.x版本信息
+
+- [Spring Boot 2.2 正式发布，大幅性能提升 + Java 13 支持](http://blog.didispace.com/spring-boot-2-2-release/)
+- [Spring Boot 2.3.0 发布](/spring-boot-2-3-0-release/) 
+- [Spring Boot 2.3.0 放弃 Maven 转投 Gradle](/spring-boot-gradle/)
+- [Spring Boot 2.3.2 发布，解决 Too many open files 导致的应用宕机问题](http://blog.didispace.com/spring-boot-2-3-2-release/)
+- [Spring Boot 2.4.0 正式发布！全新的配置处理机制，拥抱云原生！](http://blog.didispace.com/spring-boot-2-4-0-ga/)
+- [Spring Boot 2.4.1 发布，修正大量2.4全新配置机制的Bug](http://blog.didispace.com/spring-boot-2-4-1-release/)
+- [Spring Boot 2.5.0 发布：支持Java16、Gradle 7、Datasource初始化调整](https://blog.didispace.com/spring-boot-2-5-0-release/)
+- [Spring Boot 2.5.1 发布](https://blog.didispace.com/spring-boot-2-5-1-release/)
+
+## 推荐内容
+
+- [我的博客](http://blog.didispace.com)：分享平时学习和实践过的技术内容
+- [知识星球](https://t.xiaomiquan.com/zfEiY3v)：聊聊技术人的斜杠生活
+- [Spring Boot基础教程](http://blog.didispace.com/Spring-Boot%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网Star最多的免费Spring Boot基础教程
+- [Spring Cloud基础教程](http://blog.didispace.com/Spring-Cloud%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/)：全网最早最全的免费Spring Cloud基础教程
+
+## 我的公众号
+
+<img src="https://blog.didispace.com/css/images/weixin.jpg" style="width:150px;height:150px;" />
+
+## 推荐我的书
+
+![Spring Boot微服务实战](https://git.oschina.net/uploads/images/2017/0416/233656_dd3bce94_437188.png)
+
+## 特别赞助商
+
+<table>
+      <tbody>
+        <tr>
+          <td align="center" valign="middle">
+             <a href="https://start.aliyun.com/" target="_blank">
+               <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/001.jpg?raw=true">
+             </a>
+          </td>
+          <td align="center" valign="middle">
+            <a href="http://gk.link/a/103EK" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/002.jpg?raw=true">
+            </a>
+          </td>  
+          <td align="center" valign="middle">
+             <a href="https://openwrite.cn/?from=didi-springcloud" target="_blank">
+               <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/003.jpg?raw=true">
+             </a>
+          </td>          
+        </tr>
+        <tr>
+          <td align="center" valign="middle">
+            <a href="https://www.aliyun.com/minisite/goods?userCode=wxfqkr0o&share_source=copy_link" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/004.jpg?raw=true">
+            </a>
+          </td>  
+          <td align="center" valign="middle">
+            <a href="https://curl.qcloud.com/M5wV9Ylj" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/images/github/005.jpg?raw=true">
+            </a>
+          </td> 
+          <td align="center" valign="middle">
+          </td>
+        </tr>
+      </tbody>
+</table>
+
+> 如果您也想赞助支持并出现在上表中的话，可以通过邮件联系我：`didi@didispace.com`
\ No newline at end of file
diff --git a/2.x/chapter1-1/.gitignore b/2.x/chapter1-1/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter1-1/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter1-1/pom.xml b/2.x/chapter1-1/pom.xml
new file mode 100644
index 00000000..d4e872a6
--- /dev/null
+++ b/2.x/chapter1-1/pom.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter1-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter1-1</name>
+	<description>快速入门</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter1-1/src/main/java/com/didispace/chapter11/Chapter11Application.java b/2.x/chapter1-1/src/main/java/com/didispace/chapter11/Chapter11Application.java
new file mode 100644
index 00000000..17cd4a7c
--- /dev/null
+++ b/2.x/chapter1-1/src/main/java/com/didispace/chapter11/Chapter11Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter11;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter11Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter11Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter1-1/src/main/java/com/didispace/chapter11/HelloController.java b/2.x/chapter1-1/src/main/java/com/didispace/chapter11/HelloController.java
new file mode 100644
index 00000000..d19b5ef6
--- /dev/null
+++ b/2.x/chapter1-1/src/main/java/com/didispace/chapter11/HelloController.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter11;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+
+    @RequestMapping("/hello")
+    public String index() {
+        return "Hello World";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter1-1/src/main/resources/application.properties b/2.x/chapter1-1/src/main/resources/application.properties
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/2.x/chapter1-1/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/2.x/chapter1-1/src/test/java/com/didispace/chapter11/Chapter11ApplicationTests.java b/2.x/chapter1-1/src/test/java/com/didispace/chapter11/Chapter11ApplicationTests.java
new file mode 100644
index 00000000..e39db87a
--- /dev/null
+++ b/2.x/chapter1-1/src/test/java/com/didispace/chapter11/Chapter11ApplicationTests.java
@@ -0,0 +1,33 @@
+package com.didispace.chapter11;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+
+@SpringBootTest
+public class Chapter11ApplicationTests {
+
+    private MockMvc mvc;
+
+    @Before
+    public void setUp() {
+        mvc = MockMvcBuilders.standaloneSetup(new HelloController()).build();
+    }
+
+    @Test
+    public void getHello() throws Exception {
+        mvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(content().string(equalTo("Hello World")));
+    }
+
+}
diff --git a/2.x/chapter1-2/.gitignore b/2.x/chapter1-2/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter1-2/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter1-2/pom.xml b/2.x/chapter1-2/pom.xml
new file mode 100644
index 00000000..4bee1018
--- /dev/null
+++ b/2.x/chapter1-2/pom.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter1-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter1-2</name>
+	<description>2.4版本前后的多环境配置与配置激活</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter1-2/src/main/java/com/didispace/chapter12/Chapter12Application.java b/2.x/chapter1-2/src/main/java/com/didispace/chapter12/Chapter12Application.java
new file mode 100644
index 00000000..135b7e80
--- /dev/null
+++ b/2.x/chapter1-2/src/main/java/com/didispace/chapter12/Chapter12Application.java
@@ -0,0 +1,29 @@
+package com.didispace.chapter12;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class Chapter12Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter12Application.class, args);
+    }
+
+    @RestController
+    static class HelloController {
+
+        @Value("${name:}")
+        private String name;
+
+        @RequestMapping("/")
+        public String index() {
+            return name;
+        }
+
+    }
+
+}
diff --git a/2.x/chapter1-2/src/main/resources/application.yaml b/2.x/chapter1-2/src/main/resources/application.yaml
new file mode 100644
index 00000000..ad1b68d1
--- /dev/null
+++ b/2.x/chapter1-2/src/main/resources/application.yaml
@@ -0,0 +1,31 @@
+# 默认激活dev配置
+spring:
+  profiles:
+    active: "dev"
+
+---
+
+spring:
+  config:
+    activate:
+      on-profile: "dev"
+
+name: dev.didispace.com
+
+---
+
+spring:
+  config:
+    activate:
+      on-profile: "test"
+
+name: test.didispace.com
+
+---
+
+spring:
+  config:
+    activate:
+      on-profile: "prod"
+
+name: prod.didispace.com
\ No newline at end of file
diff --git a/2.x/chapter1-3/.gitignore b/2.x/chapter1-3/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter1-3/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter1-3/pom.xml b/2.x/chapter1-3/pom.xml
new file mode 100644
index 00000000..93b6ec3a
--- /dev/null
+++ b/2.x/chapter1-3/pom.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter1-3</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter1-3</name>
+	<description>2.4版本前后的配置分组配置</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter1-3/src/main/java/com/didispace/chapter13/Chapter13Application.java b/2.x/chapter1-3/src/main/java/com/didispace/chapter13/Chapter13Application.java
new file mode 100644
index 00000000..7db17464
--- /dev/null
+++ b/2.x/chapter1-3/src/main/java/com/didispace/chapter13/Chapter13Application.java
@@ -0,0 +1,37 @@
+package com.didispace.chapter13;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+
+@SpringBootApplication
+public class Chapter13Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter13Application.class, args);
+    }
+
+    @Slf4j
+    @RestController
+    static class HelloController {
+
+        @Value("${db:}")
+        private String db;
+
+        @Value("${mq:}")
+        private String mq;
+
+        @RequestMapping("/")
+        public String index() {
+            log.info("db：" + db);
+            log.info("mq：" + mq);
+            return "";
+        }
+
+    }
+
+}
diff --git a/2.x/chapter1-3/src/main/resources/application.yaml b/2.x/chapter1-3/src/main/resources/application.yaml
new file mode 100644
index 00000000..70e7a52e
--- /dev/null
+++ b/2.x/chapter1-3/src/main/resources/application.yaml
@@ -0,0 +1,61 @@
+# 2.4之前的配置
+#spring:
+#  profiles:
+#    active: "dev"
+#
+#---
+#spring.profiles: "dev"
+#spring.profiles.include: "dev-db,dev-mq"
+#
+#---
+#spring.profiles: "dev-db"
+#
+#db: dev-db.didispace.com
+#
+#---
+#spring.profiles: "dev-mq"
+#
+#mq: dev-mq.didispace.com
+#
+#---
+
+#2.4之后的配置
+# 默认激活dev配置
+spring:
+  profiles:
+    active: "dev"
+    group:
+      "dev": "dev-db,dev-mq"
+      "prod": "prod-db,prod-mq"
+
+---
+spring:
+  config:
+    activate:
+      on-profile: "dev-db"
+
+db: dev-db.didispace.com
+
+---
+spring:
+  config:
+    activate:
+      on-profile: "dev-mq"
+
+mq: dev-mq.didispace.com
+
+---
+spring:
+  config:
+    activate:
+      on-profile: "prod-db"
+
+db: prod-db.didispace.com
+
+---
+spring:
+  config:
+    activate:
+      on-profile: "prod-mq"
+
+mq: prod-mq.didispace.com
diff --git a/2.x/chapter1-4/.gitignore b/2.x/chapter1-4/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter1-4/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter1-4/pom.xml b/2.x/chapter1-4/pom.xml
new file mode 100644
index 00000000..5bbd4008
--- /dev/null
+++ b/2.x/chapter1-4/pom.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter1-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter1-4</name>
+	<description>配置元数据的应用</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-configuration-processor</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter1-4/src/main/java/com/didispace/chapter14/Chapter14Application.java b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/Chapter14Application.java
new file mode 100644
index 00000000..ff6b7d72
--- /dev/null
+++ b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/Chapter14Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter14;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter14Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter14Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter1-4/src/main/java/com/didispace/chapter14/DidiProperties.java b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/DidiProperties.java
new file mode 100644
index 00000000..d283aef1
--- /dev/null
+++ b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/DidiProperties.java
@@ -0,0 +1,17 @@
+package com.didispace.chapter14;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Data
+@Configuration
+@ConfigurationProperties(prefix = "com.didispace")
+public class DidiProperties {
+
+    /**
+     * 这是一个测试配置
+     */
+    private String from;
+
+}
diff --git a/2.x/chapter1-4/src/main/java/com/didispace/chapter14/HelloController.java b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/HelloController.java
new file mode 100644
index 00000000..084af5b8
--- /dev/null
+++ b/2.x/chapter1-4/src/main/java/com/didispace/chapter14/HelloController.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter14;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+
+    @RequestMapping("/hello")
+    public String index() {
+        return "Hello World";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter1-4/src/main/resources/application.properties b/2.x/chapter1-4/src/main/resources/application.properties
new file mode 100644
index 00000000..20da7c87
--- /dev/null
+++ b/2.x/chapter1-4/src/main/resources/application.properties
@@ -0,0 +1,3 @@
+
+com.didispace.from=didi
+
diff --git a/2.x/chapter1-5/.gitignore b/2.x/chapter1-5/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter1-5/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter1-5/pom.xml b/2.x/chapter1-5/pom.xml
new file mode 100644
index 00000000..a9c25152
--- /dev/null
+++ b/2.x/chapter1-5/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter1-5</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>加密配置中的敏感信息</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.github.ulisesbocchio</groupId>
+            <artifactId>jasypt-spring-boot-starter</artifactId>
+            <version>3.0.3</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>com.github.ulisesbocchio</groupId>
+                <artifactId>jasypt-maven-plugin</artifactId>
+                <version>3.0.3</version>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter1-5/src/main/java/com/didispace/chapter15/Chapter15Application.java b/2.x/chapter1-5/src/main/java/com/didispace/chapter15/Chapter15Application.java
new file mode 100644
index 00000000..6b0c79d6
--- /dev/null
+++ b/2.x/chapter1-5/src/main/java/com/didispace/chapter15/Chapter15Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter15;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter15Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter15Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter1-5/src/main/resources/application.properties b/2.x/chapter1-5/src/main/resources/application.properties
new file mode 100644
index 00000000..b5780fe0
--- /dev/null
+++ b/2.x/chapter1-5/src/main/resources/application.properties
@@ -0,0 +1,10 @@
+
+datasource.password=ENC(/AL9nJENCYCh9Pfzdf2xLPsqOZ6HwNgQ3AnMybFAMeOM5GphZlOK6PxzozwtCm+Q)
+
+jasypt.encryptor.password=didispace
+
+# mvn jasypt:encrypt -Djasypt.encryptor.password=didispace
+# mvn jasypt:decrypt -Djasypt.encryptor.password=didispace
+
+#jasypt.encryptor.property.prefix=ENC(
+#jasypt.encryptor.property.suffix=)
\ No newline at end of file
diff --git a/2.x/chapter1-5/src/test/java/com/didispace/chapter15/PropertiesTest.java b/2.x/chapter1-5/src/test/java/com/didispace/chapter15/PropertiesTest.java
new file mode 100644
index 00000000..db8ff86d
--- /dev/null
+++ b/2.x/chapter1-5/src/test/java/com/didispace/chapter15/PropertiesTest.java
@@ -0,0 +1,21 @@
+package com.didispace.chapter15;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@Slf4j
+@SpringBootTest
+public class PropertiesTest {
+
+    @Value("${datasource.password:}")
+    private String password;
+
+    @Test
+    public void test() {
+        log.info("datasource.password : {}", password);
+    }
+
+}
diff --git a/2.x/chapter2-1/.gitignore b/2.x/chapter2-1/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-1/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-1/pom.xml b/2.x/chapter2-1/pom.xml
new file mode 100644
index 00000000..3b306388
--- /dev/null
+++ b/2.x/chapter2-1/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter2-1</name>
+	<description>构建RESTful API与单元测试</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter2-1/src/main/java/com/didispace/chapter21/Chapter21Application.java b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/Chapter21Application.java
new file mode 100644
index 00000000..936e8024
--- /dev/null
+++ b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/Chapter21Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter21;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter21Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter21Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter2-1/src/main/java/com/didispace/chapter21/User.java b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/User.java
new file mode 100644
index 00000000..1f8749c1
--- /dev/null
+++ b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/User.java
@@ -0,0 +1,12 @@
+package com.didispace.chapter21;
+
+import lombok.Data;
+
+@Data
+public class User {
+
+    private Long id;
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-1/src/main/java/com/didispace/chapter21/UserController.java b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/UserController.java
new file mode 100644
index 00000000..c855f1a9
--- /dev/null
+++ b/2.x/chapter2-1/src/main/java/com/didispace/chapter21/UserController.java
@@ -0,0 +1,79 @@
+package com.didispace.chapter21;
+
+import org.springframework.web.bind.annotation.*;
+
+import java.util.*;
+
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<Long, User>());
+
+    /**
+     * 处理"/users/"的GET请求，用来获取用户列表
+     *
+     * @return
+     */
+    @GetMapping("/")
+    public List<User> getUserList() {
+        // 还可以通过@RequestParam从页面中传递参数来进行查询条件或者翻页信息的传递
+        List<User> r = new ArrayList<User>(users.values());
+        return r;
+    }
+
+    /**
+     * 处理"/users/"的POST请求，用来创建User
+     *
+     * @param user
+     * @return
+     */
+    @PostMapping("/")
+    public String postUser(@RequestBody User user) {
+        // @RequestBody注解用来绑定通过http请求中application/json类型上传的数据
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    /**
+     * 处理"/users/{id}"的GET请求，用来获取url中id值的User信息
+     *
+     * @param id
+     * @return
+     */
+    @GetMapping("/{id}")
+    public User getUser(@PathVariable Long id) {
+        // url中的id可通过@PathVariable绑定到函数的参数中
+        return users.get(id);
+    }
+
+    /**
+     * 处理"/users/{id}"的PUT请求，用来更新User信息
+     *
+     * @param id
+     * @param user
+     * @return
+     */
+    @PutMapping("/{id}")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    /**
+     * 处理"/users/{id}"的DELETE请求，用来删除User
+     *
+     * @param id
+     * @return
+     */
+    @DeleteMapping("/{id}")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-1/src/main/resources/application.properties b/2.x/chapter2-1/src/main/resources/application.properties
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/2.x/chapter2-1/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java b/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java
new file mode 100644
index 00000000..880d2823
--- /dev/null
+++ b/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java
@@ -0,0 +1,79 @@
+package com.didispace.chapter21;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter21ApplicationTests {
+
+    private MockMvc mvc;
+
+    @Before
+    public void setUp() {
+        mvc = MockMvcBuilders.standaloneSetup(new UserController()).build();
+    }
+
+    @Test
+    public void testUserController() throws Exception {
+        // 测试UserController
+        RequestBuilder request;
+
+        // 1、get查一下user列表，应该为空
+        request = get("/users/");
+        mvc.perform(request)
+                .andExpect(status().isOk())
+                .andExpect(content().string(equalTo("[]")));
+
+        // 2、post提交一个user
+        request = post("/users/")
+                .contentType(MediaType.APPLICATION_JSON)
+                .content("{\"id\":1,\"name\":\"测试大师\",\"age\":20}");
+        mvc.perform(request)
+                .andExpect(content().string(equalTo("success")));
+
+        // 3、get获取user列表，应该有刚才插入的数据
+        request = get("/users/");
+        mvc.perform(request)
+                .andExpect(status().isOk())
+                .andExpect(content().string(equalTo("[{\"id\":1,\"name\":\"测试大师\",\"age\":20}]")));
+
+        // 4、put修改id为1的user
+        request = put("/users/1")
+                .contentType(MediaType.APPLICATION_JSON)
+                .content("{\"name\":\"测试终极大师\",\"age\":30}");
+        mvc.perform(request)
+                .andExpect(content().string(equalTo("success")));
+
+        // 5、get一个id为1的user
+        request = get("/users/1");
+        mvc.perform(request)
+                .andExpect(content().string(equalTo("{\"id\":1,\"name\":\"测试终极大师\",\"age\":30}")));
+
+        // 6、del删除id为1的user
+        request = delete("/users/1");
+        mvc.perform(request)
+                .andExpect(content().string(equalTo("success")));
+
+        // 7、get查一下user列表，应该为空
+        request = get("/users/");
+        mvc.perform(request)
+                .andExpect(status().isOk())
+                .andExpect(content().string(equalTo("[]")));
+
+    }
+
+}
diff --git a/2.x/chapter2-2/.gitignore b/2.x/chapter2-2/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-2/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-2/pom.xml b/2.x/chapter2-2/pom.xml
new file mode 100644
index 00000000..7d31c5eb
--- /dev/null
+++ b/2.x/chapter2-2/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter2-2</name>
+	<description>使用Swagger2构建强大的API文档</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.spring4all</groupId>
+			<artifactId>swagger-spring-boot-starter</artifactId>
+			<version>1.9.0.RELEASE</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter2-2/src/main/java/com/didispace/chapter22/Chapter22Application.java b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/Chapter22Application.java
new file mode 100644
index 00000000..cd6963b8
--- /dev/null
+++ b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/Chapter22Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter22;
+
+import com.spring4all.swagger.EnableSwagger2Doc;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@EnableSwagger2Doc
+@SpringBootApplication
+public class Chapter22Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter22Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-2/src/main/java/com/didispace/chapter22/User.java b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/User.java
new file mode 100644
index 00000000..1a265300
--- /dev/null
+++ b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/User.java
@@ -0,0 +1,18 @@
+package com.didispace.chapter22;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+@Data
+@ApiModel(description="用户实体")
+public class User {
+
+    @ApiModelProperty("用户编号")
+    private Long id;
+    @ApiModelProperty("用户姓名")
+    private String name;
+    @ApiModelProperty("用户年龄")
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-2/src/main/java/com/didispace/chapter22/UserController.java b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/UserController.java
new file mode 100644
index 00000000..cc517afb
--- /dev/null
+++ b/2.x/chapter2-2/src/main/java/com/didispace/chapter22/UserController.java
@@ -0,0 +1,56 @@
+package com.didispace.chapter22;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.*;
+
+@Api(tags = "用户管理")
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+
+    @GetMapping("/")
+    @ApiOperation(value = "获取用户列表")
+    public List<User> getUserList() {
+        List<User> r = new ArrayList<>(users.values());
+        return r;
+    }
+
+    @PostMapping("/")
+    @ApiOperation(value = "创建用户", notes = "根据User对象创建用户")
+    public String postUser(@RequestBody User user) {
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    @GetMapping("/{id}")
+    @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息")
+    public User getUser(@PathVariable Long id) {
+        return users.get(id);
+    }
+
+    @PutMapping("/{id}")
+    @ApiImplicitParam(paramType = "path", dataType = "Long", name = "id", value = "用户编号", required = true, example = "1")
+    @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    @DeleteMapping("/{id}")
+    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-2/src/main/resources/application.properties b/2.x/chapter2-2/src/main/resources/application.properties
new file mode 100644
index 00000000..55ec2942
--- /dev/null
+++ b/2.x/chapter2-2/src/main/resources/application.properties
@@ -0,0 +1,13 @@
+
+
+swagger.title=spring-boot-starter-swagger
+swagger.description=Starter for swagger 2.x
+swagger.version=1.9.0.RELEASE
+swagger.license=Apache License, Version 2.0
+swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
+swagger.termsOfServiceUrl=https://github.com/dyc87112/spring-boot-starter-swagger
+swagger.contact.name=didi
+swagger.contact.url=http://blog.didispace.com
+swagger.contact.email=dyc87112@qq.com
+swagger.base-package=com.didispace
+swagger.base-path=/**
\ No newline at end of file
diff --git a/2.x/chapter2-3/.gitignore b/2.x/chapter2-3/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-3/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-3/pom.xml b/2.x/chapter2-3/pom.xml
new file mode 100644
index 00000000..da056f65
--- /dev/null
+++ b/2.x/chapter2-3/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-3</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter2-3</name>
+	<description>使用JSR-303实现请求参数校验</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.spring4all</groupId>
+			<artifactId>swagger-spring-boot-starter</artifactId>
+			<version>1.9.0.RELEASE</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter2-3/src/main/java/com/didispace/chapter23/Chapter23Application.java b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/Chapter23Application.java
new file mode 100644
index 00000000..7ecdd42d
--- /dev/null
+++ b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/Chapter23Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter23;
+
+import com.spring4all.swagger.EnableSwagger2Doc;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@EnableSwagger2Doc
+@SpringBootApplication
+public class Chapter23Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter23Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-3/src/main/java/com/didispace/chapter23/User.java b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/User.java
new file mode 100644
index 00000000..12f85c88
--- /dev/null
+++ b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/User.java
@@ -0,0 +1,32 @@
+package com.didispace.chapter23;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+import javax.validation.constraints.*;
+
+@Data
+@ApiModel(description = "用户实体")
+public class User {
+
+    @ApiModelProperty("用户编号")
+    private Long id;
+
+    @NotNull
+    @Size(min = 2, max = 5)
+    @ApiModelProperty("用户姓名")
+    private String name;
+
+    @NotNull
+    @Max(100)
+    @Min(10)
+    @ApiModelProperty("用户年龄")
+    private Integer age;
+
+    @NotNull
+    @Email
+    @ApiModelProperty("用户邮箱")
+    private String email;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-3/src/main/java/com/didispace/chapter23/UserController.java b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/UserController.java
new file mode 100644
index 00000000..963ac4c4
--- /dev/null
+++ b/2.x/chapter2-3/src/main/java/com/didispace/chapter23/UserController.java
@@ -0,0 +1,57 @@
+package com.didispace.chapter23;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import java.util.*;
+
+@Api(tags = "用户管理")
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+
+    @GetMapping("/")
+    @ApiOperation(value = "获取用户列表")
+    public List<User> getUserList() {
+        List<User> r = new ArrayList<>(users.values());
+        return r;
+    }
+
+    @PostMapping("/")
+    @ApiOperation(value = "创建用户", notes = "根据User对象创建用户")
+    public String postUser(@Valid @RequestBody User user) {
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    @GetMapping("/{id}")
+    @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息")
+    public User getUser(@PathVariable Long id) {
+        return users.get(id);
+    }
+
+    @PutMapping("/{id}")
+    @ApiImplicitParam(paramType = "path", dataType = "Long", name = "id", value = "用户编号", required = true, example = "1")
+    @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    @DeleteMapping("/{id}")
+    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-3/src/main/resources/application.properties b/2.x/chapter2-3/src/main/resources/application.properties
new file mode 100644
index 00000000..55ec2942
--- /dev/null
+++ b/2.x/chapter2-3/src/main/resources/application.properties
@@ -0,0 +1,13 @@
+
+
+swagger.title=spring-boot-starter-swagger
+swagger.description=Starter for swagger 2.x
+swagger.version=1.9.0.RELEASE
+swagger.license=Apache License, Version 2.0
+swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
+swagger.termsOfServiceUrl=https://github.com/dyc87112/spring-boot-starter-swagger
+swagger.contact.name=didi
+swagger.contact.url=http://blog.didispace.com
+swagger.contact.email=dyc87112@qq.com
+swagger.base-package=com.didispace
+swagger.base-path=/**
\ No newline at end of file
diff --git a/2.x/chapter2-4/.gitignore b/2.x/chapter2-4/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-4/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-4/pom.xml b/2.x/chapter2-4/pom.xml
new file mode 100644
index 00000000..844ae4d1
--- /dev/null
+++ b/2.x/chapter2-4/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter2-4</name>
+	<description>Swagger接口分类与各元素排序问题详解</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.spring4all</groupId>
+			<artifactId>swagger-spring-boot-starter</artifactId>
+			<version>1.9.0.RELEASE</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter2-4/src/main/java/com/didispace/chapter24/Chapter24Application.java b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/Chapter24Application.java
new file mode 100644
index 00000000..736bc4f3
--- /dev/null
+++ b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/Chapter24Application.java
@@ -0,0 +1,61 @@
+package com.didispace.chapter24;
+
+import com.spring4all.swagger.EnableSwagger2Doc;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.Tag;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import java.util.ArrayList;
+import java.util.List;
+
+@EnableSwagger2Doc
+@SpringBootApplication
+public class Chapter24Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter24Application.class, args);
+    }
+
+    @Api(tags = {"1-教师管理","3-教学管理"})
+    @RestController
+    @RequestMapping(value = "/teacher")
+    static class TeacherController {
+
+        @ApiOperation(value = "xxx")
+        @GetMapping("/xxx")
+        public String xxx() {
+            return "xxx";
+        }
+
+    }
+
+    @Api(tags = {"2-学生管理"})
+    @RestController
+    @RequestMapping(value = "/student")
+    static class StudentController {
+
+        @ApiOperation(value = "获取学生清单", tags = "3-教学管理")
+        @GetMapping("/list")
+        public String bbb() {
+            return "bbb";
+        }
+
+        @ApiOperation("获取教某个学生的老师清单")
+        @GetMapping("/his-teachers")
+        public String ccc() {
+            return "ccc";
+        }
+
+        @ApiOperation("创建一个学生")
+        @PostMapping("/aaa")
+        public String aaa() {
+            return "aaa";
+        }
+
+    }
+
+}
diff --git a/2.x/chapter2-4/src/main/java/com/didispace/chapter24/User.java b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/User.java
new file mode 100644
index 00000000..1d13b648
--- /dev/null
+++ b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/User.java
@@ -0,0 +1,32 @@
+package com.didispace.chapter24;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+import javax.validation.constraints.*;
+
+@Data
+@ApiModel(description = "用户实体")
+public class User {
+
+    @ApiModelProperty(value = "用户编号", position = 1)
+    private Long id;
+
+    @NotNull
+    @Size(min = 2, max = 5)
+    @ApiModelProperty(value = "用户姓名", position = 2)
+    private String name;
+
+    @NotNull
+    @Max(100)
+    @Min(10)
+    @ApiModelProperty(value = "用户年龄", position = 3)
+    private Integer age;
+
+    @NotNull
+    @Email
+    @ApiModelProperty(value = "用户邮箱", position = 4)
+    private String email;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-4/src/main/java/com/didispace/chapter24/UserController.java b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/UserController.java
new file mode 100644
index 00000000..871a2d9b
--- /dev/null
+++ b/2.x/chapter2-4/src/main/java/com/didispace/chapter24/UserController.java
@@ -0,0 +1,57 @@
+package com.didispace.chapter24;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import java.util.*;
+
+@Api(tags = "用户管理")
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+
+    @GetMapping("/")
+    @ApiOperation(value = "获取用户列表")
+    public List<User> getUserList() {
+        List<User> r = new ArrayList<>(users.values());
+        return r;
+    }
+
+    @PostMapping("/")
+    @ApiOperation(value = "创建用户", notes = "根据User对象创建用户")
+    public String postUser(@Valid @RequestBody User user) {
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    @GetMapping("/{id}")
+    @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息")
+    public User getUser(@PathVariable Long id) {
+        return users.get(id);
+    }
+
+    @PutMapping("/{id}")
+    @ApiImplicitParam(paramType = "path", dataType = "Long", name = "id", value = "用户编号", required = true, example = "1")
+    @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    @DeleteMapping("/{id}")
+    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-4/src/main/resources/application.properties b/2.x/chapter2-4/src/main/resources/application.properties
new file mode 100644
index 00000000..335a5f4b
--- /dev/null
+++ b/2.x/chapter2-4/src/main/resources/application.properties
@@ -0,0 +1,16 @@
+
+
+swagger.title=spring-boot-starter-swagger
+swagger.description=Starter for swagger 2.x
+swagger.version=1.9.0.RELEASE
+swagger.license=Apache License, Version 2.0
+swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
+swagger.termsOfServiceUrl=https://github.com/dyc87112/spring-boot-starter-swagger
+swagger.contact.name=didi
+swagger.contact.url=http://blog.didispace.com
+swagger.contact.email=dyc87112@qq.com
+swagger.base-package=com.didispace
+swagger.base-path=/**
+
+swagger.ui-config.tags-sorter=alpha
+swagger.ui-config.operations-sorter=alpha
\ No newline at end of file
diff --git a/2.x/chapter2-5/.gitignore b/2.x/chapter2-5/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-5/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-5/pom.xml b/2.x/chapter2-5/pom.xml
new file mode 100644
index 00000000..2b81ca3b
--- /dev/null
+++ b/2.x/chapter2-5/pom.xml
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-5</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>chapter2-5</name>
+	<description>Swagger静态文档的生成</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.spring4all</groupId>
+			<artifactId>swagger-spring-boot-starter</artifactId>
+			<version>1.9.0.RELEASE</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+        <dependency>
+            <groupId>io.github.swagger2markup</groupId>
+            <artifactId>swagger2markup</artifactId>
+            <version>1.3.3</version>
+			<scope>test</scope>
+        </dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+
+			<plugin>
+				<groupId>io.github.swagger2markup</groupId>
+				<artifactId>swagger2markup-maven-plugin</artifactId>
+				<version>1.3.3</version>
+				<configuration>
+					<swaggerInput>http://localhost:8080/v2/api-docs</swaggerInput>
+					<outputDir>src/docs/asciidoc/generated-by-plugin</outputDir>
+					<config>
+						<swagger2markup.markupLanguage>ASCIIDOC</swagger2markup.markupLanguage>
+					</config>
+				</configuration>
+			</plugin>
+
+			<plugin>
+				<groupId>org.asciidoctor</groupId>
+				<artifactId>asciidoctor-maven-plugin</artifactId>
+				<version>1.5.6</version>
+				<configuration>
+					<sourceDirectory>src/docs/asciidoc/generated</sourceDirectory>
+					<outputDirectory>src/docs/asciidoc/html</outputDirectory>
+					<backend>html</backend>
+					<sourceHighlighter>coderay</sourceHighlighter>
+					<attributes>
+						<toc>left</toc>
+					</attributes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+	<repositories>
+		<repository>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+			<id>jcenter-releases</id>
+			<name>jcenter</name>
+			<url>http://jcenter.bintray.com</url>
+		</repository>
+	</repositories>
+
+</project>
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/definitions.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/definitions.adoc
new file mode 100644
index 00000000..3a20e7fb
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/definitions.adoc
@@ -0,0 +1,22 @@
+
+[[_definitions]]
+== Definitions
+
+[[_user]]
+=== User
+用户实体
+
+
+[options="header", cols=".^3,.^11,.^4"]
+|===
+|Name|Description|Schema
+|**age** +
+__optional__|用户年龄|integer (int32)
+|**id** +
+__optional__|用户编号|integer (int64)
+|**name** +
+__optional__|用户姓名|string
+|===
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/overview.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/overview.adoc
new file mode 100644
index 00000000..4b9eefbf
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/overview.adoc
@@ -0,0 +1,38 @@
+= spring-boot-starter-swagger
+
+
+[[_overview]]
+== Overview
+Starter for swagger 2.x
+
+
+=== Version information
+[%hardbreaks]
+__Version__ : 1.9.0.RELEASE
+
+
+=== Contact information
+[%hardbreaks]
+__Contact__ : didi
+__Contact Email__ : dyc87112@qq.com
+
+
+=== License information
+[%hardbreaks]
+__License__ : Apache License, Version 2.0
+__License URL__ : https://www.apache.org/licenses/LICENSE-2.0.html
+__Terms of service__ : https://github.com/dyc87112/spring-boot-starter-swagger
+
+
+=== URI scheme
+[%hardbreaks]
+__Host__ : localhost:8080
+__BasePath__ : /
+
+
+=== Tags
+
+* 用户管理 : User Controller
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/paths.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/paths.adoc
new file mode 100644
index 00000000..5e9cf92f
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/paths.adoc
@@ -0,0 +1,265 @@
+
+[[_paths]]
+== Paths
+
+[[_postuserusingpost]]
+=== 创建用户
+....
+POST /users/
+....
+
+
+==== Description
+根据User对象创建用户
+
+
+==== Parameters
+
+[options="header", cols=".^2,.^3,.^9,.^4"]
+|===
+|Type|Name|Description|Schema
+|**Body**|**user** +
+__required__|user|<<_user,User>>
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2,.^14,.^4"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**201**|Created|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Consumes
+
+* `application/json`
+
+
+==== Produces
+
+* `*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3,.^4,.^13"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_getuserlistusingget]]
+=== 获取用户列表
+....
+GET /users/
+....
+
+
+==== Responses
+
+[options="header", cols=".^2,.^14,.^4"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|< <<_user,User>> > array
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Produces
+
+* `*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3,.^4,.^13"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_getuserusingget]]
+=== 获取用户详细信息
+....
+GET /users/{id}
+....
+
+
+==== Description
+根据url的id来获取用户详细信息
+
+
+==== Parameters
+
+[options="header", cols=".^2,.^3,.^9,.^4"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|id|integer (int64)
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2,.^14,.^4"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|<<_user,User>>
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Produces
+
+* `*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3,.^4,.^13"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_putuserusingput]]
+=== 更新用户详细信息
+....
+PUT /users/{id}
+....
+
+
+==== Description
+根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息
+
+
+==== Parameters
+
+[options="header", cols=".^2,.^3,.^9,.^4"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|用户编号|integer (int64)
+|**Body**|**user** +
+__required__|user|<<_user,User>>
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2,.^14,.^4"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**201**|Created|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Consumes
+
+* `application/json`
+
+
+==== Produces
+
+* `*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3,.^4,.^13"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_deleteuserusingdelete]]
+=== 删除用户
+....
+DELETE /users/{id}
+....
+
+
+==== Description
+根据url的id来指定删除对象
+
+
+==== Parameters
+
+[options="header", cols=".^2,.^3,.^9,.^4"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|id|integer (int64)
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2,.^14,.^4"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**204**|No Content|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|===
+
+
+==== Produces
+
+* `*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3,.^4,.^13"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/security.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/security.adoc
new file mode 100644
index 00000000..01db83a5
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated-by-plugin/security.adoc
@@ -0,0 +1,13 @@
+
+[[_securityscheme]]
+== Security
+
+[[_authorization]]
+=== Authorization
+[%hardbreaks]
+__Type__ : apiKey
+__Name__ : TOKEN
+__In__ : HEADER
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated/definitions.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated/definitions.adoc
new file mode 100644
index 00000000..a739bda5
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated/definitions.adoc
@@ -0,0 +1,22 @@
+
+[[_definitions]]
+== Definitions
+
+[[_user]]
+=== User
+用户实体
+
+
+[options="header", cols=".^3a,.^11a,.^4a"]
+|===
+|Name|Description|Schema
+|**age** +
+__optional__|用户年龄|integer (int32)
+|**id** +
+__optional__|用户编号|integer (int64)
+|**name** +
+__optional__|用户姓名|string
+|===
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated/overview.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated/overview.adoc
new file mode 100644
index 00000000..4b9eefbf
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated/overview.adoc
@@ -0,0 +1,38 @@
+= spring-boot-starter-swagger
+
+
+[[_overview]]
+== Overview
+Starter for swagger 2.x
+
+
+=== Version information
+[%hardbreaks]
+__Version__ : 1.9.0.RELEASE
+
+
+=== Contact information
+[%hardbreaks]
+__Contact__ : didi
+__Contact Email__ : dyc87112@qq.com
+
+
+=== License information
+[%hardbreaks]
+__License__ : Apache License, Version 2.0
+__License URL__ : https://www.apache.org/licenses/LICENSE-2.0.html
+__Terms of service__ : https://github.com/dyc87112/spring-boot-starter-swagger
+
+
+=== URI scheme
+[%hardbreaks]
+__Host__ : localhost:8080
+__BasePath__ : /
+
+
+=== Tags
+
+* 用户管理 : User Controller
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated/paths.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated/paths.adoc
new file mode 100644
index 00000000..6fa4471d
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated/paths.adoc
@@ -0,0 +1,265 @@
+
+[[_paths]]
+== Paths
+
+[[_postuserusingpost]]
+=== 创建用户
+....
+POST /users/
+....
+
+
+==== Description
+根据User对象创建用户
+
+
+==== Parameters
+
+[options="header", cols=".^2a,.^3a,.^9a,.^4a"]
+|===
+|Type|Name|Description|Schema
+|**Body**|**user** +
+__required__|user|<<_user,User>>
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2a,.^14a,.^4a"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**201**|Created|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Consumes
+
+* `application/json`
+
+
+==== Produces
+
+* `\*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3a,.^4a,.^13a"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_getuserlistusingget]]
+=== 获取用户列表
+....
+GET /users/
+....
+
+
+==== Responses
+
+[options="header", cols=".^2a,.^14a,.^4a"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|< <<_user,User>> > array
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Produces
+
+* `\*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3a,.^4a,.^13a"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_getuserusingget]]
+=== 获取用户详细信息
+....
+GET /users/{id}
+....
+
+
+==== Description
+根据url的id来获取用户详细信息
+
+
+==== Parameters
+
+[options="header", cols=".^2a,.^3a,.^9a,.^4a"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|id|integer (int64)
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2a,.^14a,.^4a"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|<<_user,User>>
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Produces
+
+* `\*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3a,.^4a,.^13a"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_putuserusingput]]
+=== 更新用户详细信息
+....
+PUT /users/{id}
+....
+
+
+==== Description
+根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息
+
+
+==== Parameters
+
+[options="header", cols=".^2a,.^3a,.^9a,.^4a"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|用户编号|integer (int64)
+|**Body**|**user** +
+__required__|user|<<_user,User>>
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2a,.^14a,.^4a"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**201**|Created|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|**404**|Not Found|No Content
+|===
+
+
+==== Consumes
+
+* `application/json`
+
+
+==== Produces
+
+* `\*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3a,.^4a,.^13a"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+[[_deleteuserusingdelete]]
+=== 删除用户
+....
+DELETE /users/{id}
+....
+
+
+==== Description
+根据url的id来指定删除对象
+
+
+==== Parameters
+
+[options="header", cols=".^2a,.^3a,.^9a,.^4a"]
+|===
+|Type|Name|Description|Schema
+|**Path**|**id** +
+__required__|id|integer (int64)
+|===
+
+
+==== Responses
+
+[options="header", cols=".^2a,.^14a,.^4a"]
+|===
+|HTTP Code|Description|Schema
+|**200**|OK|string
+|**204**|No Content|No Content
+|**401**|Unauthorized|No Content
+|**403**|Forbidden|No Content
+|===
+
+
+==== Produces
+
+* `\*/*`
+
+
+==== Tags
+
+* 用户管理
+
+
+==== Security
+
+[options="header", cols=".^3a,.^4a,.^13a"]
+|===
+|Type|Name|Scopes
+|**apiKey**|**<<_authorization,Authorization>>**|global
+|===
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/generated/security.adoc b/2.x/chapter2-5/src/docs/asciidoc/generated/security.adoc
new file mode 100644
index 00000000..01db83a5
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/generated/security.adoc
@@ -0,0 +1,13 @@
+
+[[_securityscheme]]
+== Security
+
+[[_authorization]]
+=== Authorization
+[%hardbreaks]
+__Type__ : apiKey
+__Name__ : TOKEN
+__In__ : HEADER
+
+
+
diff --git a/2.x/chapter2-5/src/docs/asciidoc/html/definitions.html b/2.x/chapter2-5/src/docs/asciidoc/html/definitions.html
new file mode 100644
index 00000000..1a9a17f8
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/html/definitions.html
@@ -0,0 +1,603 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta name="generator" content="Asciidoctor 1.5.6.1">
+<title>Definitions</title>
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+<ul class="sectlevel1">
+<li><a href="#_definitions">Definitions</a>
+<ul class="sectlevel2">
+<li><a href="#_user">User</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_definitions">Definitions</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_user">User</h3>
+<div class="paragraph">
+<p>用户实体</p>
+</div>
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+<col style="width: 61.1111%;">
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+<th class="tableblock halign-left valign-middle">Name</th>
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+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>age</strong><br>
+<em>optional</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>用户年龄</p>
+</div></div></td>
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+</div></div></td>
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+<p><strong>id</strong><br>
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+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>用户编号</p>
+</div></div></td>
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+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>用户姓名</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>string</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2019-10-15 10:39:03 CST
+</div>
+</div>
+</body>
+</html>
\ No newline at end of file
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+<body class="article toc2 toc-left">
+<div id="header">
+<h1>spring-boot-starter-swagger</h1>
+<div id="toc" class="toc2">
+<div id="toctitle">Table of Contents</div>
+<ul class="sectlevel1">
+<li><a href="#_overview">Overview</a>
+<ul class="sectlevel2">
+<li><a href="#_version_information">Version information</a></li>
+<li><a href="#_contact_information">Contact information</a></li>
+<li><a href="#_license_information">License information</a></li>
+<li><a href="#_uri_scheme">URI scheme</a></li>
+<li><a href="#_tags">Tags</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_overview">Overview</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Starter for swagger 2.x</p>
+</div>
+<div class="sect2">
+<h3 id="_version_information">Version information</h3>
+<div class="paragraph">
+<p><em>Version</em> : 1.9.0.RELEASE</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_contact_information">Contact information</h3>
+<div class="paragraph">
+<p><em>Contact</em> : didi<br>
+<em>Contact Email</em> : <a href="mailto:dyc87112@qq.com">dyc87112@qq.com</a></p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_license_information">License information</h3>
+<div class="paragraph">
+<p><em>License</em> : Apache License, Version 2.0<br>
+<em>License URL</em> : <a href="https://www.apache.org/licenses/LICENSE-2.0.html" class="bare">https://www.apache.org/licenses/LICENSE-2.0.html</a><br>
+<em>Terms of service</em> : <a href="https://github.com/dyc87112/spring-boot-starter-swagger" class="bare">https://github.com/dyc87112/spring-boot-starter-swagger</a></p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_uri_scheme">URI scheme</h3>
+<div class="paragraph">
+<p><em>Host</em> : localhost:8080<br>
+<em>BasePath</em> : /</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_tags">Tags</h3>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理 : User Controller</p>
+</li>
+</ul>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2019-10-15 10:39:03 CST
+</div>
+</div>
+</body>
+</html>
\ No newline at end of file
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+</head>
+<body class="article toc2 toc-left">
+<div id="header">
+<div id="toc" class="toc2">
+<div id="toctitle">Table of Contents</div>
+<ul class="sectlevel1">
+<li><a href="#_paths">Paths</a>
+<ul class="sectlevel2">
+<li><a href="#_postuserusingpost">创建用户</a></li>
+<li><a href="#_getuserlistusingget">获取用户列表</a></li>
+<li><a href="#_getuserusingget">获取用户详细信息</a></li>
+<li><a href="#_putuserusingput">更新用户详细信息</a></li>
+<li><a href="#_deleteuserusingdelete">删除用户</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_paths">Paths</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_postuserusingpost">创建用户</h3>
+<div class="literalblock">
+<div class="content">
+<pre>POST /users/</pre>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_description">Description</h4>
+<div class="paragraph">
+<p>根据User对象创建用户</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_parameters">Parameters</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 11.1111%;">
+<col style="width: 16.6666%;">
+<col style="width: 50%;">
+<col style="width: 22.2223%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>Body</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>user</strong><br>
+<em>required</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>user</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><a href="#_user">User</a></p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_responses">Responses</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 10%;">
+<col style="width: 70%;">
+<col style="width: 20%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">HTTP Code</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>200</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>OK</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>string</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>201</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Created</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>401</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Unauthorized</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>403</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Forbidden</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>404</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Not Found</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_consumes">Consumes</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>application/json</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_produces">Produces</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>*/*</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tags">Tags</h4>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理</p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_security">Security</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 15%;">
+<col style="width: 20%;">
+<col style="width: 65%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Scopes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>apiKey</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong><a href="#_authorization">Authorization</a></strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>global</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_getuserlistusingget">获取用户列表</h3>
+<div class="literalblock">
+<div class="content">
+<pre>GET /users/</pre>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_responses_2">Responses</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 10%;">
+<col style="width: 70%;">
+<col style="width: 20%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">HTTP Code</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>200</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>OK</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>&lt; <a href="#_user">User</a> &gt; array</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>401</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Unauthorized</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>403</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Forbidden</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>404</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Not Found</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_produces_2">Produces</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>*/*</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tags_2">Tags</h4>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理</p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_security_2">Security</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 15%;">
+<col style="width: 20%;">
+<col style="width: 65%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Scopes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>apiKey</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong><a href="#_authorization">Authorization</a></strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>global</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_getuserusingget">获取用户详细信息</h3>
+<div class="literalblock">
+<div class="content">
+<pre>GET /users/{id}</pre>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_description_2">Description</h4>
+<div class="paragraph">
+<p>根据url的id来获取用户详细信息</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_parameters_2">Parameters</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 11.1111%;">
+<col style="width: 16.6666%;">
+<col style="width: 50%;">
+<col style="width: 22.2223%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>Path</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>id</strong><br>
+<em>required</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>id</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>integer (int64)</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_responses_3">Responses</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 10%;">
+<col style="width: 70%;">
+<col style="width: 20%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">HTTP Code</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>200</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>OK</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><a href="#_user">User</a></p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>401</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Unauthorized</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>403</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Forbidden</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>404</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Not Found</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_produces_3">Produces</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>*/*</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tags_3">Tags</h4>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理</p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_security_3">Security</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 15%;">
+<col style="width: 20%;">
+<col style="width: 65%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Scopes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>apiKey</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong><a href="#_authorization">Authorization</a></strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>global</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_putuserusingput">更新用户详细信息</h3>
+<div class="literalblock">
+<div class="content">
+<pre>PUT /users/{id}</pre>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_description_3">Description</h4>
+<div class="paragraph">
+<p>根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_parameters_3">Parameters</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 11.1111%;">
+<col style="width: 16.6666%;">
+<col style="width: 50%;">
+<col style="width: 22.2223%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>Path</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>id</strong><br>
+<em>required</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>用户编号</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>integer (int64)</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>Body</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>user</strong><br>
+<em>required</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>user</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><a href="#_user">User</a></p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_responses_4">Responses</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 10%;">
+<col style="width: 70%;">
+<col style="width: 20%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">HTTP Code</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>200</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>OK</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>string</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>201</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Created</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>401</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Unauthorized</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>403</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Forbidden</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>404</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Not Found</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_consumes_2">Consumes</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>application/json</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_produces_4">Produces</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>*/*</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tags_4">Tags</h4>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理</p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_security_4">Security</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 15%;">
+<col style="width: 20%;">
+<col style="width: 65%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Scopes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>apiKey</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong><a href="#_authorization">Authorization</a></strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>global</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_deleteuserusingdelete">删除用户</h3>
+<div class="literalblock">
+<div class="content">
+<pre>DELETE /users/{id}</pre>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_description_4">Description</h4>
+<div class="paragraph">
+<p>根据url的id来指定删除对象</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_parameters_4">Parameters</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 11.1111%;">
+<col style="width: 16.6666%;">
+<col style="width: 50%;">
+<col style="width: 22.2223%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>Path</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>id</strong><br>
+<em>required</em></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>id</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>integer (int64)</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_responses_5">Responses</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 10%;">
+<col style="width: 70%;">
+<col style="width: 20%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">HTTP Code</th>
+<th class="tableblock halign-left valign-middle">Description</th>
+<th class="tableblock halign-left valign-middle">Schema</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>200</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>OK</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>string</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>204</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>401</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Unauthorized</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>403</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>Forbidden</p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>No Content</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_produces_5">Produces</h4>
+<div class="ulist">
+<ul>
+<li>
+<p><code>*/*</code></p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tags_5">Tags</h4>
+<div class="ulist">
+<ul>
+<li>
+<p>用户管理</p>
+</li>
+</ul>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_security_5">Security</h4>
+<table class="tableblock frame-all grid-all spread">
+<colgroup>
+<col style="width: 15%;">
+<col style="width: 20%;">
+<col style="width: 65%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-middle">Type</th>
+<th class="tableblock halign-left valign-middle">Name</th>
+<th class="tableblock halign-left valign-middle">Scopes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong>apiKey</strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p><strong><a href="#_authorization">Authorization</a></strong></p>
+</div></div></td>
+<td class="tableblock halign-left valign-middle"><div><div class="paragraph">
+<p>global</p>
+</div></div></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2019-10-15 10:39:03 CST
+</div>
+</div>
+</body>
+</html>
\ No newline at end of file
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new file mode 100644
index 00000000..34676fab
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/asciidoc/html/security.html
@@ -0,0 +1,553 @@
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+.CodeRay .head .head{color:#f4f}
+</style>
+</head>
+<body class="article toc2 toc-left">
+<div id="header">
+<div id="toc" class="toc2">
+<div id="toctitle">Table of Contents</div>
+<ul class="sectlevel1">
+<li><a href="#_securityscheme">Security</a>
+<ul class="sectlevel2">
+<li><a href="#_authorization">Authorization</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_securityscheme">Security</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_authorization">Authorization</h3>
+<div class="paragraph">
+<p><em>Type</em> : apiKey<br>
+<em>Name</em> : TOKEN<br>
+<em>In</em> : HEADER</p>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2019-10-15 10:39:03 CST
+</div>
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter2-5/src/docs/confluence/generated/definitions.txt b/2.x/chapter2-5/src/docs/confluence/generated/definitions.txt
new file mode 100644
index 00000000..6792429a
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/confluence/generated/definitions.txt
@@ -0,0 +1,14 @@
+
+h2. Definitions {anchor:definitions}
+
+h3. User {anchor:user}
+用户实体
+
+
+||Name||Description||Schema||
+|*age*\\ \\ _optional_||用户年龄||integer (int32)|
+|*id*\\ \\ _optional_||用户编号||integer (int64)|
+|*name*\\ \\ _optional_||用户姓名||string|
+
+
+
diff --git a/2.x/chapter2-5/src/docs/confluence/generated/overview.txt b/2.x/chapter2-5/src/docs/confluence/generated/overview.txt
new file mode 100644
index 00000000..af12d61b
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/confluence/generated/overview.txt
@@ -0,0 +1,33 @@
+h1. spring-boot-starter-swagger
+
+
+h2. Overview {anchor:overview}
+Starter for swagger 2.x
+
+
+h3. Version information
+_Version_ : 1.9.0.RELEASE
+
+
+h3. Contact information
+_Contact_ : didi\\ 
+_Contact Email_ : dyc87112@qq.com
+
+
+h3. License information
+_License_ : Apache License, Version 2.0\\ 
+_License URL_ : https://www.apache.org/licenses/LICENSE-2.0.html\\ 
+_Terms of service_ : https://github.com/dyc87112/spring-boot-starter-swagger
+
+
+h3. URI scheme
+_Host_ : localhost:8080\\ 
+_BasePath_ : /
+
+
+h3. Tags
+
+* 用户管理 : User Controller
+
+
+
diff --git a/2.x/chapter2-5/src/docs/confluence/generated/paths.txt b/2.x/chapter2-5/src/docs/confluence/generated/paths.txt
new file mode 100644
index 00000000..5b169e5d
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/confluence/generated/paths.txt
@@ -0,0 +1,212 @@
+
+h2. Paths {anchor:paths}
+
+h3. 创建用户 {anchor:postuserusingpost}
+{noformat}
+POST /users/
+{noformat}
+
+
+h4. Description
+根据User对象创建用户
+
+
+h4. Parameters
+
+||Type||Name||Description||Schema||
+|*Body*|*user*\\ \\ _required_||user||[User|#user]|
+
+
+h4. Responses
+
+||HTTP Code||Description||Schema||
+|*200*||OK||string|
+|*201*||Created||No Content|
+|*401*||Unauthorized||No Content|
+|*403*||Forbidden||No Content|
+|*404*||Not Found||No Content|
+
+
+h4. Consumes
+
+* {noformat}application/json{noformat}
+
+
+h4. Produces
+
+* {noformat}\*/*{noformat}
+
+
+h4. Tags
+
+* 用户管理
+
+
+h4. Security
+
+||Type||Name||Scopes||
+|*apiKey*|*[Authorization|#authorization]*||global|
+
+
+h3. 获取用户列表 {anchor:getuserlistusingget}
+{noformat}
+GET /users/
+{noformat}
+
+
+h4. Responses
+
+||HTTP Code||Description||Schema||
+|*200*||OK||< [User|#user] > array|
+|*401*||Unauthorized||No Content|
+|*403*||Forbidden||No Content|
+|*404*||Not Found||No Content|
+
+
+h4. Produces
+
+* {noformat}\*/*{noformat}
+
+
+h4. Tags
+
+* 用户管理
+
+
+h4. Security
+
+||Type||Name||Scopes||
+|*apiKey*|*[Authorization|#authorization]*||global|
+
+
+h3. 获取用户详细信息 {anchor:getuserusingget}
+{noformat}
+GET /users/{id}
+{noformat}
+
+
+h4. Description
+根据url的id来获取用户详细信息
+
+
+h4. Parameters
+
+||Type||Name||Description||Schema||
+|*Path*|*id*\\ \\ _required_||id||integer (int64)|
+
+
+h4. Responses
+
+||HTTP Code||Description||Schema||
+|*200*||OK||[User|#user]|
+|*401*||Unauthorized||No Content|
+|*403*||Forbidden||No Content|
+|*404*||Not Found||No Content|
+
+
+h4. Produces
+
+* {noformat}\*/*{noformat}
+
+
+h4. Tags
+
+* 用户管理
+
+
+h4. Security
+
+||Type||Name||Scopes||
+|*apiKey*|*[Authorization|#authorization]*||global|
+
+
+h3. 更新用户详细信息 {anchor:putuserusingput}
+{noformat}
+PUT /users/{id}
+{noformat}
+
+
+h4. Description
+根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息
+
+
+h4. Parameters
+
+||Type||Name||Description||Schema||
+|*Path*|*id*\\ \\ _required_||用户编号||integer (int64)|
+|*Body*|*user*\\ \\ _required_||user||[User|#user]|
+
+
+h4. Responses
+
+||HTTP Code||Description||Schema||
+|*200*||OK||string|
+|*201*||Created||No Content|
+|*401*||Unauthorized||No Content|
+|*403*||Forbidden||No Content|
+|*404*||Not Found||No Content|
+
+
+h4. Consumes
+
+* {noformat}application/json{noformat}
+
+
+h4. Produces
+
+* {noformat}\*/*{noformat}
+
+
+h4. Tags
+
+* 用户管理
+
+
+h4. Security
+
+||Type||Name||Scopes||
+|*apiKey*|*[Authorization|#authorization]*||global|
+
+
+h3. 删除用户 {anchor:deleteuserusingdelete}
+{noformat}
+DELETE /users/{id}
+{noformat}
+
+
+h4. Description
+根据url的id来指定删除对象
+
+
+h4. Parameters
+
+||Type||Name||Description||Schema||
+|*Path*|*id*\\ \\ _required_||id||integer (int64)|
+
+
+h4. Responses
+
+||HTTP Code||Description||Schema||
+|*200*||OK||string|
+|*204*||No Content||No Content|
+|*401*||Unauthorized||No Content|
+|*403*||Forbidden||No Content|
+
+
+h4. Produces
+
+* {noformat}\*/*{noformat}
+
+
+h4. Tags
+
+* 用户管理
+
+
+h4. Security
+
+||Type||Name||Scopes||
+|*apiKey*|*[Authorization|#authorization]*||global|
+
+
+
diff --git a/2.x/chapter2-5/src/docs/confluence/generated/security.txt b/2.x/chapter2-5/src/docs/confluence/generated/security.txt
new file mode 100644
index 00000000..7594f1b5
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/confluence/generated/security.txt
@@ -0,0 +1,10 @@
+
+h2. Security {anchor:securityscheme}
+
+h3. Authorization {anchor:authorization}
+_Type_ : apiKey\\ 
+_Name_ : TOKEN\\ 
+_In_ : HEADER
+
+
+
diff --git a/2.x/chapter2-5/src/docs/markdown/generated/definitions.md b/2.x/chapter2-5/src/docs/markdown/generated/definitions.md
new file mode 100644
index 00000000..4eaff931
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/markdown/generated/definitions.md
@@ -0,0 +1,17 @@
+
+<a name="definitions"></a>
+## Definitions
+
+<a name="user"></a>
+### User
+用户实体
+
+
+|Name|Description|Schema|
+|---|---|---|
+|**age**  <br>*optional*|用户年龄|integer (int32)|
+|**id**  <br>*optional*|用户编号|integer (int64)|
+|**name**  <br>*optional*|用户姓名|string|
+
+
+
diff --git a/2.x/chapter2-5/src/docs/markdown/generated/overview.md b/2.x/chapter2-5/src/docs/markdown/generated/overview.md
new file mode 100644
index 00000000..d360d5a8
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/markdown/generated/overview.md
@@ -0,0 +1,34 @@
+# spring-boot-starter-swagger
+
+
+<a name="overview"></a>
+## Overview
+Starter for swagger 2.x
+
+
+### Version information
+*Version* : 1.9.0.RELEASE
+
+
+### Contact information
+*Contact* : didi  
+*Contact Email* : dyc87112@qq.com
+
+
+### License information
+*License* : Apache License, Version 2.0  
+*License URL* : https://www.apache.org/licenses/LICENSE-2.0.html  
+*Terms of service* : https://github.com/dyc87112/spring-boot-starter-swagger
+
+
+### URI scheme
+*Host* : localhost:8080  
+*BasePath* : /
+
+
+### Tags
+
+* 用户管理 : User Controller
+
+
+
diff --git a/2.x/chapter2-5/src/docs/markdown/generated/paths.md b/2.x/chapter2-5/src/docs/markdown/generated/paths.md
new file mode 100644
index 00000000..d056676a
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/markdown/generated/paths.md
@@ -0,0 +1,232 @@
+
+<a name="paths"></a>
+## Paths
+
+<a name="postuserusingpost"></a>
+### 创建用户
+```
+POST /users/
+```
+
+
+#### Description
+根据User对象创建用户
+
+
+#### Parameters
+
+|Type|Name|Description|Schema|
+|---|---|---|---|
+|**Body**|**user**  <br>*required*|user|[User](#user)|
+
+
+#### Responses
+
+|HTTP Code|Description|Schema|
+|---|---|---|
+|**200**|OK|string|
+|**201**|Created|No Content|
+|**401**|Unauthorized|No Content|
+|**403**|Forbidden|No Content|
+|**404**|Not Found|No Content|
+
+
+#### Consumes
+
+* `application/json`
+
+
+#### Produces
+
+* `\*/*`
+
+
+#### Tags
+
+* 用户管理
+
+
+#### Security
+
+|Type|Name|Scopes|
+|---|---|---|
+|**apiKey**|**[Authorization](#authorization)**|global|
+
+
+<a name="getuserlistusingget"></a>
+### 获取用户列表
+```
+GET /users/
+```
+
+
+#### Responses
+
+|HTTP Code|Description|Schema|
+|---|---|---|
+|**200**|OK|< [User](#user) > array|
+|**401**|Unauthorized|No Content|
+|**403**|Forbidden|No Content|
+|**404**|Not Found|No Content|
+
+
+#### Produces
+
+* `\*/*`
+
+
+#### Tags
+
+* 用户管理
+
+
+#### Security
+
+|Type|Name|Scopes|
+|---|---|---|
+|**apiKey**|**[Authorization](#authorization)**|global|
+
+
+<a name="getuserusingget"></a>
+### 获取用户详细信息
+```
+GET /users/{id}
+```
+
+
+#### Description
+根据url的id来获取用户详细信息
+
+
+#### Parameters
+
+|Type|Name|Description|Schema|
+|---|---|---|---|
+|**Path**|**id**  <br>*required*|id|integer (int64)|
+
+
+#### Responses
+
+|HTTP Code|Description|Schema|
+|---|---|---|
+|**200**|OK|[User](#user)|
+|**401**|Unauthorized|No Content|
+|**403**|Forbidden|No Content|
+|**404**|Not Found|No Content|
+
+
+#### Produces
+
+* `\*/*`
+
+
+#### Tags
+
+* 用户管理
+
+
+#### Security
+
+|Type|Name|Scopes|
+|---|---|---|
+|**apiKey**|**[Authorization](#authorization)**|global|
+
+
+<a name="putuserusingput"></a>
+### 更新用户详细信息
+```
+PUT /users/{id}
+```
+
+
+#### Description
+根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息
+
+
+#### Parameters
+
+|Type|Name|Description|Schema|
+|---|---|---|---|
+|**Path**|**id**  <br>*required*|用户编号|integer (int64)|
+|**Body**|**user**  <br>*required*|user|[User](#user)|
+
+
+#### Responses
+
+|HTTP Code|Description|Schema|
+|---|---|---|
+|**200**|OK|string|
+|**201**|Created|No Content|
+|**401**|Unauthorized|No Content|
+|**403**|Forbidden|No Content|
+|**404**|Not Found|No Content|
+
+
+#### Consumes
+
+* `application/json`
+
+
+#### Produces
+
+* `\*/*`
+
+
+#### Tags
+
+* 用户管理
+
+
+#### Security
+
+|Type|Name|Scopes|
+|---|---|---|
+|**apiKey**|**[Authorization](#authorization)**|global|
+
+
+<a name="deleteuserusingdelete"></a>
+### 删除用户
+```
+DELETE /users/{id}
+```
+
+
+#### Description
+根据url的id来指定删除对象
+
+
+#### Parameters
+
+|Type|Name|Description|Schema|
+|---|---|---|---|
+|**Path**|**id**  <br>*required*|id|integer (int64)|
+
+
+#### Responses
+
+|HTTP Code|Description|Schema|
+|---|---|---|
+|**200**|OK|string|
+|**204**|No Content|No Content|
+|**401**|Unauthorized|No Content|
+|**403**|Forbidden|No Content|
+
+
+#### Produces
+
+* `\*/*`
+
+
+#### Tags
+
+* 用户管理
+
+
+#### Security
+
+|Type|Name|Scopes|
+|---|---|---|
+|**apiKey**|**[Authorization](#authorization)**|global|
+
+
+
diff --git a/2.x/chapter2-5/src/docs/markdown/generated/security.md b/2.x/chapter2-5/src/docs/markdown/generated/security.md
new file mode 100644
index 00000000..09ee31c4
--- /dev/null
+++ b/2.x/chapter2-5/src/docs/markdown/generated/security.md
@@ -0,0 +1,12 @@
+
+<a name="securityscheme"></a>
+## Security
+
+<a name="authorization"></a>
+### Authorization
+*Type* : apiKey  
+*Name* : TOKEN  
+*In* : HEADER
+
+
+
diff --git a/2.x/chapter2-5/src/main/java/com/didispace/chapter25/Chapter25Application.java b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/Chapter25Application.java
new file mode 100644
index 00000000..b8c92652
--- /dev/null
+++ b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/Chapter25Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter25;
+
+import com.spring4all.swagger.EnableSwagger2Doc;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@EnableSwagger2Doc
+@SpringBootApplication
+public class Chapter25Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter25Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-5/src/main/java/com/didispace/chapter25/User.java b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/User.java
new file mode 100644
index 00000000..d929259d
--- /dev/null
+++ b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/User.java
@@ -0,0 +1,18 @@
+package com.didispace.chapter25;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+@Data
+@ApiModel(description="用户实体")
+public class User {
+
+    @ApiModelProperty("用户编号")
+    private Long id;
+    @ApiModelProperty("用户姓名")
+    private String name;
+    @ApiModelProperty("用户年龄")
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-5/src/main/java/com/didispace/chapter25/UserController.java b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/UserController.java
new file mode 100644
index 00000000..ac333420
--- /dev/null
+++ b/2.x/chapter2-5/src/main/java/com/didispace/chapter25/UserController.java
@@ -0,0 +1,56 @@
+package com.didispace.chapter25;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.*;
+
+@Api(tags = "用户管理")
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+
+    @GetMapping("/")
+    @ApiOperation(value = "获取用户列表")
+    public List<User> getUserList() {
+        List<User> r = new ArrayList<>(users.values());
+        return r;
+    }
+
+    @PostMapping("/")
+    @ApiOperation(value = "创建用户", notes = "根据User对象创建用户")
+    public String postUser(@RequestBody User user) {
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    @GetMapping("/{id}")
+    @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息")
+    public User getUser(@PathVariable Long id) {
+        return users.get(id);
+    }
+
+    @PutMapping("/{id}")
+    @ApiImplicitParam(paramType = "path", dataType = "Long", name = "id", value = "用户编号", required = true, example = "1")
+    @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    @DeleteMapping("/{id}")
+    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-5/src/main/resources/application.properties b/2.x/chapter2-5/src/main/resources/application.properties
new file mode 100644
index 00000000..55ec2942
--- /dev/null
+++ b/2.x/chapter2-5/src/main/resources/application.properties
@@ -0,0 +1,13 @@
+
+
+swagger.title=spring-boot-starter-swagger
+swagger.description=Starter for swagger 2.x
+swagger.version=1.9.0.RELEASE
+swagger.license=Apache License, Version 2.0
+swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
+swagger.termsOfServiceUrl=https://github.com/dyc87112/spring-boot-starter-swagger
+swagger.contact.name=didi
+swagger.contact.url=http://blog.didispace.com
+swagger.contact.email=dyc87112@qq.com
+swagger.base-package=com.didispace
+swagger.base-path=/**
\ No newline at end of file
diff --git a/2.x/chapter2-5/src/test/java/com/didispace/chapter25/DemoApplicationTests.java b/2.x/chapter2-5/src/test/java/com/didispace/chapter25/DemoApplicationTests.java
new file mode 100644
index 00000000..d36e438e
--- /dev/null
+++ b/2.x/chapter2-5/src/test/java/com/didispace/chapter25/DemoApplicationTests.java
@@ -0,0 +1,71 @@
+package com.didispace.chapter25;
+
+import io.github.swagger2markup.Swagger2MarkupConfig;
+import io.github.swagger2markup.Swagger2MarkupConverter;
+import io.github.swagger2markup.builder.Swagger2MarkupConfigBuilder;
+import io.github.swagger2markup.markup.builder.MarkupLanguage;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.net.URL;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
+public class DemoApplicationTests {
+
+    @Test
+    public void generateAsciiDocs() throws Exception {
+
+        URL remoteSwaggerFile = new URL("http://localhost:8080/v2/api-docs");
+        Path outputDirectory = Paths.get("src/docs/asciidoc/generated");
+
+        //    输出Ascii格式
+        Swagger2MarkupConfig config = new Swagger2MarkupConfigBuilder()
+                .withMarkupLanguage(MarkupLanguage.ASCIIDOC)
+                .build();
+
+        Swagger2MarkupConverter.from(remoteSwaggerFile)
+                .withConfig(config)
+                .build()
+                .toFolder(outputDirectory);
+    }
+
+    @Test
+    public void generateMarkdownDocs() throws Exception {
+
+        URL remoteSwaggerFile = new URL("http://localhost:8080/v2/api-docs");
+        Path outputDirectory = Paths.get("src/docs/markdown/generated");
+
+        //    输出Ascii格式
+        Swagger2MarkupConfig config = new Swagger2MarkupConfigBuilder()
+                .withMarkupLanguage(MarkupLanguage.MARKDOWN)
+                .build();
+
+        Swagger2MarkupConverter.from(remoteSwaggerFile)
+                .withConfig(config)
+                .build()
+                .toFolder(outputDirectory);
+    }
+
+    @Test
+    public void generateConfluenceDocs() throws Exception {
+
+        URL remoteSwaggerFile = new URL("http://localhost:8080/v2/api-docs");
+        Path outputDirectory = Paths.get("src/docs/confluence/generated");
+
+        //    输出Ascii格式
+        Swagger2MarkupConfig config = new Swagger2MarkupConfigBuilder()
+                .withMarkupLanguage(MarkupLanguage.CONFLUENCE_MARKUP)
+                .build();
+
+        Swagger2MarkupConverter.from(remoteSwaggerFile)
+                .withConfig(config)
+                .build()
+                .toFolder(outputDirectory);
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-6/.gitignore b/2.x/chapter2-6/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter2-6/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter2-6/pom.xml b/2.x/chapter2-6/pom.xml
new file mode 100644
index 00000000..f4252540
--- /dev/null
+++ b/2.x/chapter2-6/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter2-6</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>找回启动日志中的请求路径列表</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter2-6/src/main/java/com/didispace/chapter26/Chapter26Application.java b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/Chapter26Application.java
new file mode 100644
index 00000000..ab89e203
--- /dev/null
+++ b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/Chapter26Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter26;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter26Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter26Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-6/src/main/java/com/didispace/chapter26/User.java b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/User.java
new file mode 100644
index 00000000..60e131cd
--- /dev/null
+++ b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/User.java
@@ -0,0 +1,12 @@
+package com.didispace.chapter26;
+
+import lombok.Data;
+
+@Data
+public class User {
+
+    private Long id;
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-6/src/main/java/com/didispace/chapter26/UserController.java b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/UserController.java
new file mode 100644
index 00000000..a84cf8d4
--- /dev/null
+++ b/2.x/chapter2-6/src/main/java/com/didispace/chapter26/UserController.java
@@ -0,0 +1,46 @@
+package com.didispace.chapter26;
+
+import org.springframework.web.bind.annotation.*;
+
+import java.util.*;
+
+@RestController
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在/users下
+public class UserController {
+
+    // 创建线程安全的Map，模拟users信息的存储
+    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+
+    @GetMapping("/")
+    public List<User> getUserList() {
+        List<User> r = new ArrayList<>(users.values());
+        return r;
+    }
+
+    @PostMapping("/")
+    public String postUser(@RequestBody User user) {
+        users.put(user.getId(), user);
+        return "success";
+    }
+
+    @GetMapping("/{id}")
+    public User getUser(@PathVariable Long id) {
+        return users.get(id);
+    }
+
+    @PutMapping("/{id}")
+    public String putUser(@PathVariable Long id, @RequestBody User user) {
+        User u = users.get(id);
+        u.setName(user.getName());
+        u.setAge(user.getAge());
+        users.put(id, u);
+        return "success";
+    }
+
+    @DeleteMapping("/{id}")
+    public String deleteUser(@PathVariable Long id) {
+        users.remove(id);
+        return "success";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-6/src/main/resources/application.properties b/2.x/chapter2-6/src/main/resources/application.properties
new file mode 100644
index 00000000..eae6a38f
--- /dev/null
+++ b/2.x/chapter2-6/src/main/resources/application.properties
@@ -0,0 +1,3 @@
+# 打印RequestMapping中的所有接口信息
+logging.level.org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping=trace
+
diff --git a/2.x/chapter2-7/.gitignore b/2.x/chapter2-7/.gitignore
new file mode 100644
index 00000000..2af7cefb
--- /dev/null
+++ b/2.x/chapter2-7/.gitignore
@@ -0,0 +1,24 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
\ No newline at end of file
diff --git a/2.x/chapter2-7/pom.xml b/2.x/chapter2-7/pom.xml
new file mode 100644
index 00000000..285eeeea
--- /dev/null
+++ b/2.x/chapter2-7/pom.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.2.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-7</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用SpringFox3生成Swagger文档</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>io.springfox</groupId>
+			<artifactId>springfox-boot-starter</artifactId>
+			<version>3.0.0</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+	<repositories>
+		<repository>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+			<id>jcenter-releases</id>
+			<name>jcenter</name>
+			<url>http://jcenter.bintray.com</url>
+		</repository>
+	</repositories>
+
+</project>
diff --git a/2.x/chapter2-7/src/main/java/com/didispace/chapter27/Chapter27Application.java b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/Chapter27Application.java
new file mode 100644
index 00000000..7a6a667b
--- /dev/null
+++ b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/Chapter27Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter27;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import springfox.documentation.oas.annotations.EnableOpenApi;
+
+@EnableOpenApi
+@SpringBootApplication
+public class Chapter27Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter27Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-7/src/main/java/com/didispace/chapter27/User.java b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/User.java
new file mode 100644
index 00000000..25c99ae8
--- /dev/null
+++ b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/User.java
@@ -0,0 +1,29 @@
+package com.didispace.demo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.validation.constraints.*;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@ApiModel("用户基本信息")
+public class User {
+
+    @ApiModelProperty("姓名")
+    @Size(max = 20)
+    private String name;
+    @ApiModelProperty("年龄")
+    @Max(150)
+    @Min(1)
+    private Integer age;
+    @NotNull
+    private String address;
+    @Pattern(regexp = "^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+$")
+    private String email;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-7/src/main/java/com/didispace/chapter27/UserController.java b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/UserController.java
new file mode 100644
index 00000000..fcfb546d
--- /dev/null
+++ b/2.x/chapter2-7/src/main/java/com/didispace/chapter27/UserController.java
@@ -0,0 +1,45 @@
+package com.didispace.demo;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import org.springframework.web.bind.annotation.*;
+import springfox.documentation.annotations.ApiIgnore;
+
+import javax.validation.Valid;
+import java.util.ArrayList;
+import java.util.List;
+
+@Api(tags="用户管理")
+@RestController
+public class UserController {
+
+    @ApiOperation("创建用户")
+    @PostMapping("/users")
+    public User create(@RequestBody @Valid User user) {
+        return user;
+    }
+
+    @ApiOperation("用户详情")
+    @GetMapping("/users/{id}")
+    public User findById(@PathVariable Long id) {
+        return new User("bbb", 21, "上海", "aaa@bbb.com");
+    }
+
+    @ApiOperation("用户列表")
+    @GetMapping("/users")
+    public List<User> list(@ApiParam("查看第几页") @RequestParam int pageIndex,
+                           @ApiParam("每页多少条") @RequestParam int pageSize) {
+        List<User> result = new ArrayList<>();
+        result.add(new User("aaa", 50, "北京", "aaa@ccc.com"));
+        result.add(new User("bbb", 21, "广州", "aaa@ddd.com"));
+        return result;
+    }
+
+    @ApiIgnore
+    @DeleteMapping("/users/{id}")
+    public String deleteById(@PathVariable Long id) {
+        return "delete user : " + id;
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-7/src/main/resources/application.properties b/2.x/chapter2-7/src/main/resources/application.properties
new file mode 100644
index 00000000..d910c856
--- /dev/null
+++ b/2.x/chapter2-7/src/main/resources/application.properties
@@ -0,0 +1,2 @@
+logging.level.org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping=trace
+
diff --git a/2.x/chapter2-8/pom.xml b/2.x/chapter2-8/pom.xml
new file mode 100644
index 00000000..86a98950
--- /dev/null
+++ b/2.x/chapter2-8/pom.xml
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-8</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+	<description>如何扩展XML格式的请求和响应</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.dataformat</groupId>
+			<artifactId>jackson-dataformat-xml</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter2-8/src/main/java/com/didispace/chapter28/Chapter28Application.java b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/Chapter28Application.java
new file mode 100755
index 00000000..6577db14
--- /dev/null
+++ b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/Chapter28Application.java
@@ -0,0 +1,18 @@
+package com.didispace.chapter28;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@SpringBootApplication
+public class Chapter28Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter28Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-8/src/main/java/com/didispace/chapter28/User.java b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/User.java
new file mode 100755
index 00000000..5c035bd4
--- /dev/null
+++ b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/User.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter28;
+
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@JacksonXmlRootElement(localName = "User")
+public class User {
+
+    @JacksonXmlProperty(localName = "name")
+    private String name;
+    @JacksonXmlProperty(localName = "age")
+    private Integer age;
+
+}
diff --git a/2.x/chapter2-8/src/main/java/com/didispace/chapter28/UserController.java b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/UserController.java
new file mode 100755
index 00000000..055b4042
--- /dev/null
+++ b/2.x/chapter2-8/src/main/java/com/didispace/chapter28/UserController.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter28;
+
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@Controller
+public class UserController {
+
+    @PostMapping(value = "/user",
+            consumes = MediaType.APPLICATION_XML_VALUE,
+            produces = MediaType.APPLICATION_XML_VALUE)
+    @ResponseBody
+    public User create(@RequestBody User user) {
+        user.setName("didispace.com : " + user.getName());
+        user.setAge(user.getAge() + 100);
+        return user;
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-8/src/main/resources/application.properties b/2.x/chapter2-8/src/main/resources/application.properties
new file mode 100755
index 00000000..e69de29b
diff --git a/2.x/chapter2-9/pom.xml b/2.x/chapter2-9/pom.xml
new file mode 100644
index 00000000..9f670750
--- /dev/null
+++ b/2.x/chapter2-9/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter2-9</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.experimental</groupId>
+			<artifactId>graphql-spring-boot-starter</artifactId>
+			<version>1.0.0-SNAPSHOT</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.dataformat</groupId>
+			<artifactId>jackson-dataformat-xml</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+	<repositories>
+		<repository>
+			<id>spring-snapshots</id>
+			<url>https://repo.spring.io/snapshot</url>
+			<snapshots><enabled>true</enabled></snapshots>
+		</repository>
+		<repository>
+			<id>spring-milestones</id>
+			<url>https://repo.spring.io/milestone</url>
+		</repository>
+	</repositories>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter2-9/src/main/java/com/didispace/chapter29/Chapter29Application.java b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/Chapter29Application.java
new file mode 100755
index 00000000..c72319b2
--- /dev/null
+++ b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/Chapter29Application.java
@@ -0,0 +1,18 @@
+package com.didispace.chapter29;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@SpringBootApplication
+public class Chapter29Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter29Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter2-9/src/main/java/com/didispace/chapter29/User.java b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/User.java
new file mode 100755
index 00000000..40b2725f
--- /dev/null
+++ b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/User.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter29;
+
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@JacksonXmlRootElement(localName = "User")
+public class User {
+
+    @JacksonXmlProperty(localName = "name")
+    private String name;
+    @JacksonXmlProperty(localName = "age")
+    private Integer age;
+
+}
diff --git a/2.x/chapter2-9/src/main/java/com/didispace/chapter29/UserController.java b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/UserController.java
new file mode 100755
index 00000000..d7711fa5
--- /dev/null
+++ b/2.x/chapter2-9/src/main/java/com/didispace/chapter29/UserController.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter29;
+
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@Controller
+public class UserController {
+
+    @PostMapping(value = "/user",
+            consumes = MediaType.APPLICATION_XML_VALUE,
+            produces = MediaType.APPLICATION_XML_VALUE)
+    @ResponseBody
+    public User create(@RequestBody User user) {
+        user.setName("didispace.com : " + user.getName());
+        user.setAge(user.getAge() + 100);
+        return user;
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter2-9/src/main/resources/application.properties b/2.x/chapter2-9/src/main/resources/application.properties
new file mode 100755
index 00000000..e69de29b
diff --git a/2.x/chapter3-1/.gitignore b/2.x/chapter3-1/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-1/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-1/pom.xml b/2.x/chapter3-1/pom.xml
new file mode 100644
index 00000000..e70062b4
--- /dev/null
+++ b/2.x/chapter3-1/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用JdbcTemplate访问MySQL数据库</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-1/src/main/java/com/didispace/chapter31/Chapter31Application.java b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/Chapter31Application.java
new file mode 100644
index 00000000..c83da9dd
--- /dev/null
+++ b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/Chapter31Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter31;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter31Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter31Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-1/src/main/java/com/didispace/chapter31/User.java b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/User.java
new file mode 100644
index 00000000..5c54cf36
--- /dev/null
+++ b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/User.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter31;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserService.java b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserService.java
new file mode 100644
index 00000000..2ce0b727
--- /dev/null
+++ b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserService.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter31;
+
+import java.util.List;
+
+public interface UserService {
+
+    /**
+     * 新增一个用户
+     *
+     * @param name
+     * @param age
+     */
+    int create(String name, Integer age);
+
+    /**
+     * 根据name查询用户
+     *
+     * @param name
+     * @return
+     */
+    List<User> getByName(String name);
+
+    /**
+     * 根据name删除用户
+     *
+     * @param name
+     */
+    int deleteByName(String name);
+
+    /**
+     * 获取用户总量
+     */
+    int getAllUsers();
+
+    /**
+     * 删除所有用户
+     */
+    int deleteAllUsers();
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserServiceImpl.java b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserServiceImpl.java
new file mode 100644
index 00000000..3cb55fb2
--- /dev/null
+++ b/2.x/chapter3-1/src/main/java/com/didispace/chapter31/UserServiceImpl.java
@@ -0,0 +1,52 @@
+package com.didispace.chapter31;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Service;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    private JdbcTemplate jdbcTemplate;
+
+    UserServiceImpl(JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @Override
+    public int create(String name, Integer age) {
+        return jdbcTemplate.update("insert into USER(NAME, AGE) values(?, ?)", name, age);
+    }
+
+    @Override
+    public List<User> getByName(String name) {
+        List<User> users = jdbcTemplate.query("select NAME, AGE from USER where NAME = ?", (resultSet, i) -> {
+            User user = new User();
+            user.setName(resultSet.getString("NAME"));
+            user.setAge(resultSet.getInt("AGE"));
+            return user;
+        }, name);
+        return users;
+    }
+
+    @Override
+    public int deleteByName(String name) {
+        return jdbcTemplate.update("delete from USER where NAME = ?", name);
+    }
+
+    @Override
+    public int getAllUsers() {
+        return jdbcTemplate.queryForObject("select count(1) from USER", Integer.class);
+    }
+
+    @Override
+    public int deleteAllUsers() {
+        return jdbcTemplate.update("delete from USER");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-1/src/main/resources/application.properties b/2.x/chapter3-1/src/main/resources/application.properties
new file mode 100644
index 00000000..66ff8fe4
--- /dev/null
+++ b/2.x/chapter3-1/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
\ No newline at end of file
diff --git a/2.x/chapter3-1/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java b/2.x/chapter3-1/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java
new file mode 100644
index 00000000..2905f545
--- /dev/null
+++ b/2.x/chapter3-1/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java
@@ -0,0 +1,63 @@
+package com.didispace.chapter31;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter31ApplicationTests {
+
+    @Autowired
+    private UserService userSerivce;
+
+    @Before
+    public void setUp() {
+        // 准备，清空user表
+        userSerivce.deleteAllUsers();
+    }
+
+    @Test
+    public void test() throws Exception {
+        // 插入5个用户
+        userSerivce.create("Tom", 10);
+        userSerivce.create("Mike", 11);
+        userSerivce.create("Didispace", 30);
+        userSerivce.create("Oscar", 21);
+        userSerivce.create("Linda", 17);
+
+        // 查询名为Oscar的用户，判断年龄是否匹配
+        List<User> userList = userSerivce.getByName("Oscar");
+        Assert.assertEquals(21, userList.get(0).getAge().intValue());
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(5, userSerivce.getAllUsers());
+
+        // 删除两个用户
+        userSerivce.deleteByName("Tom");
+        userSerivce.deleteByName("Mike");
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(3, userSerivce.getAllUsers());
+
+    }
+
+}
diff --git a/2.x/chapter3-10/.gitignore b/2.x/chapter3-10/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-10/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-10/pom.xml b/2.x/chapter3-10/pom.xml
new file mode 100644
index 00000000..72162203
--- /dev/null
+++ b/2.x/chapter3-10/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-10</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>事务管理入门</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-10/src/main/java/com/didispace/chapter310/Chapter310Application.java b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/Chapter310Application.java
new file mode 100644
index 00000000..72a7dd3e
--- /dev/null
+++ b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/Chapter310Application.java
@@ -0,0 +1,25 @@
+package com.didispace.chapter310;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class Chapter310Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter310Application.class, args);
+	}
+
+	@RestController
+	static class TextController {
+
+		@GetMapping("/hello")
+		public String hello() {
+			return "hello world";
+		}
+
+	}
+
+}
diff --git a/2.x/chapter3-10/src/main/java/com/didispace/chapter310/User.java b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/User.java
new file mode 100644
index 00000000..a2347ea8
--- /dev/null
+++ b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/User.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter310;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+import javax.validation.constraints.Max;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    @Max(50)
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-10/src/main/java/com/didispace/chapter310/UserRepository.java b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/UserRepository.java
new file mode 100644
index 00000000..366e1d21
--- /dev/null
+++ b/2.x/chapter3-10/src/main/java/com/didispace/chapter310/UserRepository.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter310;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/7/9.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    User findByName(String name);
+
+    User findByNameAndAge(String name, Integer age);
+
+    @Query("from User u where u.name=:name")
+    User findUser(@Param("name") String name);
+
+}
diff --git a/2.x/chapter3-10/src/main/resources/application.properties b/2.x/chapter3-10/src/main/resources/application.properties
new file mode 100644
index 00000000..7238387a
--- /dev/null
+++ b/2.x/chapter3-10/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
+spring.jpa.hibernate.ddl-auto=create
diff --git a/2.x/chapter3-10/src/test/java/com/didispace/chapter310/Chapter310ApplicationTests.java b/2.x/chapter3-10/src/test/java/com/didispace/chapter310/Chapter310ApplicationTests.java
new file mode 100644
index 00000000..02fee65b
--- /dev/null
+++ b/2.x/chapter3-10/src/test/java/com/didispace/chapter310/Chapter310ApplicationTests.java
@@ -0,0 +1,56 @@
+package com.didispace.chapter310;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
+
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter310ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    @Transactional
+    public void test() throws Exception {
+        // 创建10条记录
+        userRepository.save(new User("AAA", 10));
+        userRepository.save(new User("BBB", 20));
+        userRepository.save(new User("CCC", 30));
+        userRepository.save(new User("DDD", 40));
+        userRepository.save(new User("EEE", 50));
+        userRepository.save(new User("FFF", 60));
+        userRepository.save(new User("GGG", 70));
+        userRepository.save(new User("HHH", 80));
+        userRepository.save(new User("III", 90));
+        userRepository.save(new User("JJJ", 100));
+
+        // 测试findAll, 查询所有记录
+        Assert.assertEquals(10, userRepository.findAll().size());
+
+        // 测试findByName, 查询姓名为FFF的User
+        Assert.assertEquals(60, userRepository.findByName("FFF").getAge().longValue());
+
+        // 测试findUser, 查询姓名为FFF的User
+        Assert.assertEquals(60, userRepository.findUser("FFF").getAge().longValue());
+
+        // 测试findByNameAndAge, 查询姓名为FFF并且年龄为60的User
+        Assert.assertEquals("FFF", userRepository.findByNameAndAge("FFF", 60).getName());
+
+        // 测试删除姓名为AAA的User
+        userRepository.delete(userRepository.findByName("AAA"));
+
+        // 测试findAll, 查询所有记录, 验证上面的删除是否成功
+        Assert.assertEquals(9, userRepository.findAll().size());
+
+    }
+
+}
diff --git a/2.x/chapter3-11/.gitignore b/2.x/chapter3-11/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-11/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-11/pom.xml b/2.x/chapter3-11/pom.xml
new file mode 100644
index 00000000..c9692e8d
--- /dev/null
+++ b/2.x/chapter3-11/pom.xml
@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-11</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用Flyway管理数据库版本</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.flywaydb</groupId>
+			<artifactId>flyway-core</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-11/src/main/java/com/didispace/chapter311/Chapter311Application.java b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/Chapter311Application.java
new file mode 100644
index 00000000..9273268c
--- /dev/null
+++ b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/Chapter311Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter311;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter311Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter311Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-11/src/main/java/com/didispace/chapter311/User.java b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/User.java
new file mode 100644
index 00000000..1ca17f9c
--- /dev/null
+++ b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/User.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter311;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private Long id;
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserService.java b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserService.java
new file mode 100644
index 00000000..d5591de0
--- /dev/null
+++ b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserService.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter311;
+
+import java.util.List;
+
+public interface UserService {
+
+    /**
+     * 新增一个用户
+     *
+     * @param name
+     * @param age
+     */
+    int create(String name, Integer age);
+
+    /**
+     * 根据name查询用户
+     *
+     * @param name
+     * @return
+     */
+    List<User> getByName(String name);
+
+    /**
+     * 根据name删除用户
+     *
+     * @param name
+     */
+    int deleteByName(String name);
+
+    /**
+     * 获取用户总量
+     */
+    int getAllUsers();
+
+    /**
+     * 删除所有用户
+     */
+    int deleteAllUsers();
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserServiceImpl.java b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserServiceImpl.java
new file mode 100644
index 00000000..54aa40fe
--- /dev/null
+++ b/2.x/chapter3-11/src/main/java/com/didispace/chapter311/UserServiceImpl.java
@@ -0,0 +1,49 @@
+package com.didispace.chapter311;
+
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    private JdbcTemplate jdbcTemplate;
+
+    UserServiceImpl(JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @Override
+    public int create(String name, Integer age) {
+        return jdbcTemplate.update("insert into USER(NAME, AGE) values(?, ?)", name, age);
+    }
+
+    @Override
+    public List<User> getByName(String name) {
+        List<User> users = jdbcTemplate.query("select * from USER where NAME = ?", (resultSet, i) -> {
+            User user = new User();
+            user.setId(resultSet.getLong("ID"));
+            user.setName(resultSet.getString("NAME"));
+            user.setAge(resultSet.getInt("AGE"));
+            return user;
+        }, name);
+        return users;
+    }
+
+    @Override
+    public int deleteByName(String name) {
+        return jdbcTemplate.update("delete from USER where NAME = ?", name);
+    }
+
+    @Override
+    public int getAllUsers() {
+        return jdbcTemplate.queryForObject("select count(1) from USER", Integer.class);
+    }
+
+    @Override
+    public int deleteAllUsers() {
+        return jdbcTemplate.update("delete from USER");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-11/src/main/resources/application.properties b/2.x/chapter3-11/src/main/resources/application.properties
new file mode 100644
index 00000000..b36e87bd
--- /dev/null
+++ b/2.x/chapter3-11/src/main/resources/application.properties
@@ -0,0 +1,6 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.flyway.locations=classpath:db/migration
\ No newline at end of file
diff --git a/2.x/chapter3-11/src/main/resources/db/migration/V1_1__alter_table_user.sql b/2.x/chapter3-11/src/main/resources/db/migration/V1_1__alter_table_user.sql
new file mode 100644
index 00000000..667486c5
--- /dev/null
+++ b/2.x/chapter3-11/src/main/resources/db/migration/V1_1__alter_table_user.sql
@@ -0,0 +1 @@
+ALTER TABLE `user` ADD COLUMN `address` VARCHAR(20) DEFAULT NULL;
diff --git a/2.x/chapter3-11/src/main/resources/db/migration/V1__Base_version.sql b/2.x/chapter3-11/src/main/resources/db/migration/V1__Base_version.sql
new file mode 100644
index 00000000..428f2187
--- /dev/null
+++ b/2.x/chapter3-11/src/main/resources/db/migration/V1__Base_version.sql
@@ -0,0 +1,7 @@
+DROP TABLE IF EXISTS user ;
+CREATE TABLE `user` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
+  `name` varchar(20) NOT NULL COMMENT '姓名',
+  `age` int(5) DEFAULT NULL COMMENT '年龄',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/2.x/chapter3-11/src/test/java/com/didispace/chapter311/Chapter311ApplicationTests.java b/2.x/chapter3-11/src/test/java/com/didispace/chapter311/Chapter311ApplicationTests.java
new file mode 100644
index 00000000..4b902ab9
--- /dev/null
+++ b/2.x/chapter3-11/src/test/java/com/didispace/chapter311/Chapter311ApplicationTests.java
@@ -0,0 +1,45 @@
+package com.didispace.chapter311;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.List;
+
+@Slf4j
+@SpringBootTest
+public class Chapter311ApplicationTests {
+
+    @Autowired
+    private UserService userSerivce;
+
+    @Test
+    public void test() throws Exception {
+        userSerivce.deleteAllUsers();
+
+        // 插入5个用户
+        userSerivce.create("Tom", 10);
+        userSerivce.create("Mike", 11);
+        userSerivce.create("Didispace", 30);
+        userSerivce.create("Oscar", 21);
+        userSerivce.create("Linda", 17);
+
+        // 查询名为Oscar的用户，判断年龄是否匹配
+        List<User> userList = userSerivce.getByName("Oscar");
+        Assertions.assertEquals(21, userList.get(0).getAge().intValue());
+
+        // 查数据库，应该有5个用户
+        Assertions.assertEquals(5, userSerivce.getAllUsers());
+
+        // 删除两个用户
+        userSerivce.deleteByName("Tom");
+        userSerivce.deleteByName("Mike");
+
+        // 查数据库，应该有5个用户
+        Assertions.assertEquals(3, userSerivce.getAllUsers());
+
+    }
+
+}
diff --git a/2.x/chapter3-12/.gitignore b/2.x/chapter3-12/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-12/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-12/pom.xml b/2.x/chapter3-12/pom.xml
new file mode 100644
index 00000000..a61772d3
--- /dev/null
+++ b/2.x/chapter3-12/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.2</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-12</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用JTA实现多数据源的事务</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jta-atomikos</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-12/src/main/java/com/didispace/chapter312/Chapter312Application.java b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/Chapter312Application.java
new file mode 100644
index 00000000..325ef162
--- /dev/null
+++ b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/Chapter312Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter312;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter312Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter312Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter3-12/src/main/java/com/didispace/chapter312/DataSourceConfiguration.java b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/DataSourceConfiguration.java
new file mode 100644
index 00000000..8b71d643
--- /dev/null
+++ b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/DataSourceConfiguration.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter312;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.boot.jta.atomikos.AtomikosDataSourceBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceConfiguration {
+
+    @Primary
+    @Bean
+    @ConfigurationProperties(prefix = "spring.jta.atomikos.datasource.primary")
+    public DataSource primaryDataSource() {
+        return new AtomikosDataSourceBean();
+    }
+
+    @Bean
+    @ConfigurationProperties(prefix = "spring.jta.atomikos.datasource.secondary")
+    public DataSource secondaryDataSource() {
+        return new AtomikosDataSourceBean();
+    }
+
+    @Bean
+    public JdbcTemplate primaryJdbcTemplate(@Qualifier("primaryDataSource") DataSource primaryDataSource) {
+        return new JdbcTemplate(primaryDataSource);
+    }
+
+    @Bean
+    public JdbcTemplate secondaryJdbcTemplate(@Qualifier("secondaryDataSource") DataSource secondaryDataSource) {
+        return new JdbcTemplate(secondaryDataSource);
+    }
+
+}
diff --git a/2.x/chapter3-12/src/main/java/com/didispace/chapter312/TestService.java b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/TestService.java
new file mode 100644
index 00000000..119241dc
--- /dev/null
+++ b/2.x/chapter3-12/src/main/java/com/didispace/chapter312/TestService.java
@@ -0,0 +1,34 @@
+package com.didispace.chapter312;
+
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+public class TestService {
+
+    private JdbcTemplate primaryJdbcTemplate;
+    private JdbcTemplate secondaryJdbcTemplate;
+
+    public TestService(JdbcTemplate primaryJdbcTemplate, JdbcTemplate secondaryJdbcTemplate) {
+        this.primaryJdbcTemplate = primaryJdbcTemplate;
+        this.secondaryJdbcTemplate = secondaryJdbcTemplate;
+    }
+
+    @Transactional
+    public void tx() {
+        // 修改test1库中的数据
+        primaryJdbcTemplate.update("update user set age = ? where name = ?", 30, "aaa");
+        // 修改test2库中的数据
+        secondaryJdbcTemplate.update("update user set age = ? where name = ?", 30, "aaa");
+    }
+
+    @Transactional
+    public void tx2() {
+        // 修改test1库中的数据
+        primaryJdbcTemplate.update("update user set age = ? where name = ?", 40, "aaa");
+        // 模拟：修改test2库之前抛出异常
+        throw new RuntimeException();
+    }
+
+}
diff --git a/2.x/chapter3-12/src/main/resources/application.properties b/2.x/chapter3-12/src/main/resources/application.properties
new file mode 100644
index 00000000..312835d1
--- /dev/null
+++ b/2.x/chapter3-12/src/main/resources/application.properties
@@ -0,0 +1,31 @@
+spring.jta.enabled=true
+
+spring.jta.atomikos.datasource.primary.xa-properties.url=jdbc:mysql://localhost:3306/test1
+spring.jta.atomikos.datasource.primary.xa-properties.user=root
+spring.jta.atomikos.datasource.primary.xa-properties.password=12345678
+spring.jta.atomikos.datasource.primary.xa-data-source-class-name=com.mysql.cj.jdbc.MysqlXADataSource
+spring.jta.atomikos.datasource.primary.unique-resource-name=test1
+spring.jta.atomikos.datasource.primary.max-pool-size=25
+spring.jta.atomikos.datasource.primary.min-pool-size=3
+spring.jta.atomikos.datasource.primary.max-lifetime=20000
+spring.jta.atomikos.datasource.primary.borrow-connection-timeout=10000
+
+spring.jta.atomikos.datasource.secondary.xa-properties.url=jdbc:mysql://localhost:3306/test2
+spring.jta.atomikos.datasource.secondary.xa-properties.user=root
+spring.jta.atomikos.datasource.secondary.xa-properties.password=12345678
+spring.jta.atomikos.datasource.secondary.xa-data-source-class-name=com.mysql.cj.jdbc.MysqlXADataSource
+spring.jta.atomikos.datasource.secondary.unique-resource-name=test2
+spring.jta.atomikos.datasource.secondary.max-pool-size=25
+spring.jta.atomikos.datasource.secondary.min-pool-size=3
+spring.jta.atomikos.datasource.secondary.max-lifetime=20000
+spring.jta.atomikos.datasource.secondary.borrow-connection-timeout=10000
+
+#spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/test1
+#spring.datasource.primary.username=root
+#spring.datasource.primary.password=12345678
+#spring.datasource.primary.driver-class-name=com.mysql.cj.jdbc.Driver
+#
+#spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/test2
+#spring.datasource.secondary.username=root
+#spring.datasource.secondary.password=12345678
+#spring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver
\ No newline at end of file
diff --git a/2.x/chapter3-12/src/test/java/com/didispace/chapter312/Chapter312ApplicationTests.java b/2.x/chapter3-12/src/test/java/com/didispace/chapter312/Chapter312ApplicationTests.java
new file mode 100644
index 00000000..649b8b17
--- /dev/null
+++ b/2.x/chapter3-12/src/test/java/com/didispace/chapter312/Chapter312ApplicationTests.java
@@ -0,0 +1,45 @@
+package com.didispace.chapter312;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.transaction.annotation.Transactional;
+
+
+@SpringBootTest(classes = Chapter312Application.class)
+public class Chapter312ApplicationTests {
+
+    @Autowired
+    protected JdbcTemplate primaryJdbcTemplate;
+    @Autowired
+    protected JdbcTemplate secondaryJdbcTemplate;
+
+    @Autowired
+    private TestService testService;
+
+    @Test
+    public void test1() throws Exception {
+        // 正确更新的情况
+        testService.tx();
+        Assertions.assertEquals(30, primaryJdbcTemplate.queryForObject("select age from user where name=?", Integer.class, "aaa"));
+        Assertions.assertEquals(30, secondaryJdbcTemplate.queryForObject("select age from user where name=?", Integer.class, "aaa"));
+    }
+
+    @Test
+    public void test2() throws Exception {
+        // 更新失败的情况
+        try {
+            testService.tx2();
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            // 部分更新失败，test1中的更新应该回滚
+            Assertions.assertEquals(30, primaryJdbcTemplate.queryForObject("select age from user where name=?", Integer.class, "aaa"));
+            Assertions.assertEquals(30, secondaryJdbcTemplate.queryForObject("select age from user where name=?", Integer.class, "aaa"));
+        }
+    }
+
+}
diff --git a/2.x/chapter3-13/.gitignore b/2.x/chapter3-13/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-13/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-13/pom.xml b/2.x/chapter3-13/pom.xml
new file mode 100644
index 00000000..de7746d3
--- /dev/null
+++ b/2.x/chapter3-13/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.0</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-13</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>2.5版本之后的数据脚本初始化</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-13/src/main/java/com/didispace/chapter313/Chapter313Application.java b/2.x/chapter3-13/src/main/java/com/didispace/chapter313/Chapter313Application.java
new file mode 100644
index 00000000..88768410
--- /dev/null
+++ b/2.x/chapter3-13/src/main/java/com/didispace/chapter313/Chapter313Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter313;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter313Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter313Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-13/src/main/resources/application.properties b/2.x/chapter3-13/src/main/resources/application.properties
new file mode 100644
index 00000000..225ddd22
--- /dev/null
+++ b/2.x/chapter3-13/src/main/resources/application.properties
@@ -0,0 +1,15 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# Spring Boot 2.5.0 init schema & data
+spring.sql.init.username=root
+spring.sql.init.password=
+spring.sql.init.schema-locations=classpath*:schema-all.sql
+#spring.sql.init.enabled=true
+#spring.sql.init.data-locations=classpath*:
+#spring.sql.init.encoding=UTF-8
+#spring.sql.init.separator=;
+#spring.sql.init.continue-on-error=true
+
diff --git a/2.x/chapter3-13/src/main/resources/schema-all.sql b/2.x/chapter3-13/src/main/resources/schema-all.sql
new file mode 100644
index 00000000..cdbe26c1
--- /dev/null
+++ b/2.x/chapter3-13/src/main/resources/schema-all.sql
@@ -0,0 +1,18 @@
+create table test.user_info
+(
+    id          int unsigned auto_increment comment '用户id'
+        primary key,
+    open_id     varchar(255)     default '' null comment '微信小程序openid',
+    nick_name   varchar(255)     default '' null comment '微信名',
+    head_img    varchar(255)     default '' null comment '微信头像',
+    sex         varchar(255)     default '' null comment '性别',
+    phone       varchar(255)     default '' null comment '手机',
+    province    varchar(255)     default '' null comment '注册地址：省',
+    city        varchar(255)     default '' null comment '注册地址：城市',
+    country     varchar(255)     default '' null comment '注册地址：县/区',
+    status      tinyint unsigned default 0  not null comment '是否标记删除 0：否 1：是',
+    create_time datetime                    not null comment '创建时间',
+    update_time datetime                    not null comment '更新时间'
+)
+    comment '用户表';
+
diff --git a/2.x/chapter3-13/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java b/2.x/chapter3-13/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java
new file mode 100644
index 00000000..e65f6029
--- /dev/null
+++ b/2.x/chapter3-13/src/test/java/com/didispace/chapter31/Chapter31ApplicationTests.java
@@ -0,0 +1,17 @@
+package com.didispace.chapter31;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+
+@SpringBootTest
+public class Chapter31ApplicationTests {
+
+
+    @Test
+    public void test() throws Exception {
+
+
+    }
+
+}
diff --git a/2.x/chapter3-2/.gitignore b/2.x/chapter3-2/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-2/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-2/pom.xml b/2.x/chapter3-2/pom.xml
new file mode 100644
index 00000000..d3a5f35d
--- /dev/null
+++ b/2.x/chapter3-2/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>默认数据源Hikari的配置详解</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-2/src/main/java/com/didispace/chapter32/Chapter32Application.java b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/Chapter32Application.java
new file mode 100644
index 00000000..d782cff1
--- /dev/null
+++ b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/Chapter32Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter32;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter32Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter32Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-2/src/main/java/com/didispace/chapter32/User.java b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/User.java
new file mode 100644
index 00000000..7553c2e2
--- /dev/null
+++ b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/User.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter32;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserService.java b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserService.java
new file mode 100644
index 00000000..c4e3cd02
--- /dev/null
+++ b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserService.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter32;
+
+import java.util.List;
+
+public interface UserService {
+
+    /**
+     * 新增一个用户
+     *
+     * @param name
+     * @param age
+     */
+    int create(String name, Integer age);
+
+    /**
+     * 根据name查询用户
+     *
+     * @param name
+     * @return
+     */
+    List<User> getByName(String name);
+
+    /**
+     * 根据name删除用户
+     *
+     * @param name
+     */
+    int deleteByName(String name);
+
+    /**
+     * 获取用户总量
+     */
+    int getAllUsers();
+
+    /**
+     * 删除所有用户
+     */
+    int deleteAllUsers();
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserServiceImpl.java b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserServiceImpl.java
new file mode 100644
index 00000000..9fb1bd08
--- /dev/null
+++ b/2.x/chapter3-2/src/main/java/com/didispace/chapter32/UserServiceImpl.java
@@ -0,0 +1,52 @@
+package com.didispace.chapter32;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Service;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    private JdbcTemplate jdbcTemplate;
+
+    UserServiceImpl(JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @Override
+    public int create(String name, Integer age) {
+        return jdbcTemplate.update("insert into USER(NAME, AGE) values(?, ?)", name, age);
+    }
+
+    @Override
+    public List<User> getByName(String name) {
+        List<User> users = jdbcTemplate.query("select NAME, AGE from USER where NAME = ?", (resultSet, i) -> {
+            User user = new User();
+            user.setName(resultSet.getString("NAME"));
+            user.setAge(resultSet.getInt("AGE"));
+            return user;
+        }, name);
+        return users;
+    }
+
+    @Override
+    public int deleteByName(String name) {
+        return jdbcTemplate.update("delete from USER where NAME = ?", name);
+    }
+
+    @Override
+    public int getAllUsers() {
+        return jdbcTemplate.queryForObject("select count(1) from USER", Integer.class);
+    }
+
+    @Override
+    public int deleteAllUsers() {
+        return jdbcTemplate.update("delete from USER");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-2/src/main/resources/application.properties b/2.x/chapter3-2/src/main/resources/application.properties
new file mode 100644
index 00000000..b0d32069
--- /dev/null
+++ b/2.x/chapter3-2/src/main/resources/application.properties
@@ -0,0 +1,17 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# 最小空闲连接，默认值10，小于0或大于maximum-pool-size，都会重置为maximum-pool-size
+spring.datasource.hikari.minimum-idle=10
+# 最大连接数，小于等于0会被重置为默认值10；大于零小于1会被重置为minimum-idle的值
+spring.datasource.hikari.maximum-pool-size=20
+# 空闲连接超时时间，默认值600000（10分钟），大于等于max-lifetime且max-lifetime>0，会被重置为0；不等于0且小于10秒，会被重置为10秒。
+spring.datasource.hikari.idle-timeout=500000
+# 连接最大存活时间.不等于0且小于30秒，会被重置为默认值30分钟.设置应该比mysql设置的超时时间短
+spring.datasource.hikari.max-lifetime=540000
+# 连接超时时间：毫秒，小于250毫秒，否则被重置为默认值30秒
+spring.datasource.hikari.connection-timeout=60000
+# 用于测试连接是否可用的查询语句
+spring.datasource.hikari.connection-test-query=SELECT 1
diff --git a/2.x/chapter3-2/src/test/java/com/didispace/chapter32/Chapter32ApplicationTests.java b/2.x/chapter3-2/src/test/java/com/didispace/chapter32/Chapter32ApplicationTests.java
new file mode 100644
index 00000000..e23dd01c
--- /dev/null
+++ b/2.x/chapter3-2/src/test/java/com/didispace/chapter32/Chapter32ApplicationTests.java
@@ -0,0 +1,69 @@
+package com.didispace.chapter32;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.sql.DataSource;
+import java.util.List;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter32ApplicationTests {
+
+    @Autowired
+    private UserService userSerivce;
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Before
+    public void setUp() {
+        // 准备，清空user表
+        userSerivce.deleteAllUsers();
+
+    }
+
+    @Test
+    public void test() throws Exception {
+        // 插入5个用户
+        userSerivce.create("Tom", 10);
+        userSerivce.create("Mike", 11);
+        userSerivce.create("Didispace", 30);
+        userSerivce.create("Oscar", 21);
+        userSerivce.create("Linda", 17);
+
+        // 查询名为Oscar的用户，判断年龄是否匹配
+        List<User> userList = userSerivce.getByName("Oscar");
+        Assert.assertEquals(21, userList.get(0).getAge().intValue());
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(5, userSerivce.getAllUsers());
+
+        // 删除两个用户
+        userSerivce.deleteByName("Tom");
+        userSerivce.deleteByName("Mike");
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(3, userSerivce.getAllUsers());
+
+    }
+
+}
diff --git a/2.x/chapter3-3/.gitignore b/2.x/chapter3-3/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-3/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-3/pom.xml b/2.x/chapter3-3/pom.xml
new file mode 100644
index 00000000..63a0dbe3
--- /dev/null
+++ b/2.x/chapter3-3/pom.xml
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-3</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用国产数据库连接池Druid</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.alibaba</groupId>
+			<artifactId>druid-spring-boot-starter</artifactId>
+			<version>1.1.21</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-3/src/main/java/com/didispace/chapter33/Chapter33Application.java b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/Chapter33Application.java
new file mode 100644
index 00000000..4653f680
--- /dev/null
+++ b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/Chapter33Application.java
@@ -0,0 +1,25 @@
+package com.didispace.chapter33;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class Chapter33Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter33Application.class, args);
+	}
+
+	@RestController
+	static class TextController {
+
+		@GetMapping("/hello")
+		public String hello() {
+			return "hello world";
+		}
+
+	}
+
+}
diff --git a/2.x/chapter3-3/src/main/java/com/didispace/chapter33/User.java b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/User.java
new file mode 100644
index 00000000..ac0b9460
--- /dev/null
+++ b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/User.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter33;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private String name;
+    private Integer age;
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserController.java b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserController.java
new file mode 100644
index 00000000..f88d0dc0
--- /dev/null
+++ b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserController.java
@@ -0,0 +1,47 @@
+package com.didispace.chapter33;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/8.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@Data
+@AllArgsConstructor
+@RestController
+public class UserController {
+
+    private UserService userService;
+
+    @PostMapping("/user")
+    public int create(@RequestBody User user) {
+        return userService.create(user.getName(), user.getAge());
+    }
+
+    @GetMapping("/user/{name}")
+    public List<User> getByName(@PathVariable String name) {
+        return userService.getByName(name);
+    }
+
+    @DeleteMapping("/user/{name}")
+    public int deleteByName(@PathVariable String name) {
+        return userService.deleteByName(name);
+    }
+
+    @GetMapping("/user/count")
+    public int getAllUsers() {
+        return userService.getAllUsers();
+    }
+
+    @DeleteMapping("/user/all")
+    public int deleteAllUsers() {
+        return userService.deleteAllUsers();
+    }
+
+}
diff --git a/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserService.java b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserService.java
new file mode 100644
index 00000000..7eddffb5
--- /dev/null
+++ b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserService.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter33;
+
+import java.util.List;
+
+public interface UserService {
+
+    /**
+     * 新增一个用户
+     *
+     * @param name
+     * @param age
+     */
+    int create(String name, Integer age);
+
+    /**
+     * 根据name查询用户
+     *
+     * @param name
+     * @return
+     */
+    List<User> getByName(String name);
+
+    /**
+     * 根据name删除用户
+     *
+     * @param name
+     */
+    int deleteByName(String name);
+
+    /**
+     * 获取用户总量
+     */
+    int getAllUsers();
+
+    /**
+     * 删除所有用户
+     */
+    int deleteAllUsers();
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserServiceImpl.java b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserServiceImpl.java
new file mode 100644
index 00000000..43f0f79a
--- /dev/null
+++ b/2.x/chapter3-3/src/main/java/com/didispace/chapter33/UserServiceImpl.java
@@ -0,0 +1,52 @@
+package com.didispace.chapter33;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Service;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    private JdbcTemplate jdbcTemplate;
+
+    UserServiceImpl(JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @Override
+    public int create(String name, Integer age) {
+        return jdbcTemplate.update("insert into USER(NAME, AGE) values(?, ?)", name, age);
+    }
+
+    @Override
+    public List<User> getByName(String name) {
+        List<User> users = jdbcTemplate.query("select NAME, AGE from USER where NAME = ?", (resultSet, i) -> {
+            User user = new User();
+            user.setName(resultSet.getString("NAME"));
+            user.setAge(resultSet.getInt("AGE"));
+            return user;
+        }, name);
+        return users;
+    }
+
+    @Override
+    public int deleteByName(String name) {
+        return jdbcTemplate.update("delete from USER where NAME = ?", name);
+    }
+
+    @Override
+    public int getAllUsers() {
+        return jdbcTemplate.queryForObject("select count(1) from USER", Integer.class);
+    }
+
+    @Override
+    public int deleteAllUsers() {
+        return jdbcTemplate.update("delete from USER");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-3/src/main/resources/application.properties b/2.x/chapter3-3/src/main/resources/application.properties
new file mode 100644
index 00000000..26f3a97b
--- /dev/null
+++ b/2.x/chapter3-3/src/main/resources/application.properties
@@ -0,0 +1,29 @@
+
+# 基础配置
+spring.datasource.druid.url=jdbc:mysql://localhost:3306/test
+spring.datasource.druid.username=root
+spring.datasource.druid.password=
+spring.datasource.druid.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# 连接池配置
+spring.datasource.druid.initialSize=10
+spring.datasource.druid.maxActive=20
+spring.datasource.druid.maxWait=60000
+spring.datasource.druid.minIdle=1
+spring.datasource.druid.timeBetweenEvictionRunsMillis=60000
+spring.datasource.druid.minEvictableIdleTimeMillis=300000
+spring.datasource.druid.testWhileIdle=true
+spring.datasource.druid.testOnBorrow=true
+spring.datasource.druid.testOnReturn=false
+spring.datasource.druid.poolPreparedStatements=true
+spring.datasource.druid.maxOpenPreparedStatements=20
+spring.datasource.druid.validationQuery=SELECT 1
+spring.datasource.druid.validation-query-timeout=500
+spring.datasource.druid.filters=stat,wall
+
+# 监控配置
+spring.datasource.druid.stat-view-servlet.enabled=true
+spring.datasource.druid.stat-view-servlet.url-pattern=/druid/*
+spring.datasource.druid.stat-view-servlet.reset-enable=true
+spring.datasource.druid.stat-view-servlet.login-username=admin
+spring.datasource.druid.stat-view-servlet.login-password=admin
diff --git a/2.x/chapter3-3/src/test/java/com/didispace/chapter33/Chapter33ApplicationTests.java b/2.x/chapter3-3/src/test/java/com/didispace/chapter33/Chapter33ApplicationTests.java
new file mode 100644
index 00000000..f86be74a
--- /dev/null
+++ b/2.x/chapter3-3/src/test/java/com/didispace/chapter33/Chapter33ApplicationTests.java
@@ -0,0 +1,69 @@
+package com.didispace.chapter33;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.sql.DataSource;
+import java.util.List;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter33ApplicationTests {
+
+    @Autowired
+    private UserService userSerivce;
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Before
+    public void setUp() {
+        // 准备，清空user表
+        userSerivce.deleteAllUsers();
+
+    }
+
+    @Test
+    public void test() throws Exception {
+        // 插入5个用户
+        userSerivce.create("Tom", 10);
+        userSerivce.create("Mike", 11);
+        userSerivce.create("Didispace", 30);
+        userSerivce.create("Oscar", 21);
+        userSerivce.create("Linda", 17);
+
+        // 查询名为Oscar的用户，判断年龄是否匹配
+        List<User> userList = userSerivce.getByName("Oscar");
+        Assert.assertEquals(21, userList.get(0).getAge().intValue());
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(5, userSerivce.getAllUsers());
+
+        // 删除两个用户
+        userSerivce.deleteByName("Tom");
+        userSerivce.deleteByName("Mike");
+
+        // 查数据库，应该有5个用户
+        Assert.assertEquals(3, userSerivce.getAllUsers());
+
+    }
+
+}
diff --git a/2.x/chapter3-4/.gitignore b/2.x/chapter3-4/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-4/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-4/pom.xml b/2.x/chapter3-4/pom.xml
new file mode 100644
index 00000000..d529c02b
--- /dev/null
+++ b/2.x/chapter3-4/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用Spring Data JPA访问MySQL</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-4/src/main/java/com/didispace/chapter34/Chapter34Application.java b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/Chapter34Application.java
new file mode 100644
index 00000000..4b9e8193
--- /dev/null
+++ b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/Chapter34Application.java
@@ -0,0 +1,25 @@
+package com.didispace.chapter34;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class Chapter34Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter34Application.class, args);
+	}
+
+	@RestController
+	static class TextController {
+
+		@GetMapping("/hello")
+		public String hello() {
+			return "hello world";
+		}
+
+	}
+
+}
diff --git a/2.x/chapter3-4/src/main/java/com/didispace/chapter34/User.java b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/User.java
new file mode 100644
index 00000000..701ed4d4
--- /dev/null
+++ b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/User.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter34;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-4/src/main/java/com/didispace/chapter34/UserRepository.java b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/UserRepository.java
new file mode 100644
index 00000000..17533dd3
--- /dev/null
+++ b/2.x/chapter3-4/src/main/java/com/didispace/chapter34/UserRepository.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter34;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/15.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    User findByName(String name);
+
+    User findByNameAndAge(String name, Integer age);
+
+    @Query("from User u where u.name=:name")
+    User findUser(@Param("name") String name);
+
+}
diff --git a/2.x/chapter3-4/src/main/resources/application.properties b/2.x/chapter3-4/src/main/resources/application.properties
new file mode 100644
index 00000000..44c64de2
--- /dev/null
+++ b/2.x/chapter3-4/src/main/resources/application.properties
@@ -0,0 +1,6 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
\ No newline at end of file
diff --git a/2.x/chapter3-4/src/test/java/com/didispace/chapter34/Chapter34ApplicationTests.java b/2.x/chapter3-4/src/test/java/com/didispace/chapter34/Chapter34ApplicationTests.java
new file mode 100644
index 00000000..e104e22c
--- /dev/null
+++ b/2.x/chapter3-4/src/test/java/com/didispace/chapter34/Chapter34ApplicationTests.java
@@ -0,0 +1,57 @@
+package com.didispace.chapter34;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.sql.DataSource;
+import java.util.List;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter34ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    public void test() throws Exception {
+        // 创建10条记录
+        userRepository.save(new User("AAA", 10));
+        userRepository.save(new User("BBB", 20));
+        userRepository.save(new User("CCC", 30));
+        userRepository.save(new User("DDD", 40));
+        userRepository.save(new User("EEE", 50));
+        userRepository.save(new User("FFF", 60));
+        userRepository.save(new User("GGG", 70));
+        userRepository.save(new User("HHH", 80));
+        userRepository.save(new User("III", 90));
+        userRepository.save(new User("JJJ", 100));
+
+        // 测试findAll, 查询所有记录
+        Assert.assertEquals(10, userRepository.findAll().size());
+
+        // 测试findByName, 查询姓名为FFF的User
+        Assert.assertEquals(60, userRepository.findByName("FFF").getAge().longValue());
+
+        // 测试findUser, 查询姓名为FFF的User
+        Assert.assertEquals(60, userRepository.findUser("FFF").getAge().longValue());
+
+        // 测试findByNameAndAge, 查询姓名为FFF并且年龄为60的User
+        Assert.assertEquals("FFF", userRepository.findByNameAndAge("FFF", 60).getName());
+
+        // 测试删除姓名为AAA的User
+        userRepository.delete(userRepository.findByName("AAA"));
+
+        // 测试findAll, 查询所有记录, 验证上面的删除是否成功
+        Assert.assertEquals(9, userRepository.findAll().size());
+
+    }
+
+}
diff --git a/2.x/chapter3-5/.gitignore b/2.x/chapter3-5/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-5/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-5/pom.xml b/2.x/chapter3-5/pom.xml
new file mode 100644
index 00000000..43bfeb2a
--- /dev/null
+++ b/2.x/chapter3-5/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-5</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用MyBatis访问MySQL</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.mybatis.spring.boot</groupId>
+			<artifactId>mybatis-spring-boot-starter</artifactId>
+			<version>2.1.1</version>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-5/src/main/java/com/didispace/chapter35/Chapter35Application.java b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/Chapter35Application.java
new file mode 100644
index 00000000..48e71f85
--- /dev/null
+++ b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/Chapter35Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter35;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter35Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter35Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-5/src/main/java/com/didispace/chapter35/User.java b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/User.java
new file mode 100644
index 00000000..d815f4c1
--- /dev/null
+++ b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/User.java
@@ -0,0 +1,20 @@
+package com.didispace.chapter35;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-5/src/main/java/com/didispace/chapter35/UserMapper.java b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/UserMapper.java
new file mode 100644
index 00000000..17f6aa18
--- /dev/null
+++ b/2.x/chapter3-5/src/main/java/com/didispace/chapter35/UserMapper.java
@@ -0,0 +1,23 @@
+package com.didispace.chapter35;
+
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/15.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@Mapper
+public interface UserMapper {
+
+    @Select("SELECT * FROM USER WHERE NAME = #{name}")
+    User findByName(@Param("name") String name);
+
+    @Insert("INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})")
+    int insert(@Param("name") String name, @Param("age") Integer age);
+
+}
diff --git a/2.x/chapter3-5/src/main/resources/application.properties b/2.x/chapter3-5/src/main/resources/application.properties
new file mode 100644
index 00000000..779d89b9
--- /dev/null
+++ b/2.x/chapter3-5/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
diff --git a/2.x/chapter3-5/src/test/java/com/didispace/chapter35/Chapter35ApplicationTests.java b/2.x/chapter3-5/src/test/java/com/didispace/chapter35/Chapter35ApplicationTests.java
new file mode 100644
index 00000000..b6de7a08
--- /dev/null
+++ b/2.x/chapter3-5/src/test/java/com/didispace/chapter35/Chapter35ApplicationTests.java
@@ -0,0 +1,33 @@
+package com.didispace.chapter35;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.sql.DataSource;
+import java.util.List;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@Transactional
+public class Chapter35ApplicationTests {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @Test
+    @Rollback
+    public void test() throws Exception {
+        userMapper.insert("AAA", 20);
+        User u = userMapper.findByName("AAA");
+        Assert.assertEquals(20, u.getAge().intValue());
+    }
+
+}
diff --git a/2.x/chapter3-6/.gitignore b/2.x/chapter3-6/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-6/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-6/pom.xml b/2.x/chapter3-6/pom.xml
new file mode 100644
index 00000000..97869305
--- /dev/null
+++ b/2.x/chapter3-6/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-6</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用MyBatis（xml配置方式）</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.mybatis.spring.boot</groupId>
+			<artifactId>mybatis-spring-boot-starter</artifactId>
+			<version>2.1.1</version>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-6/src/main/java/com/didispace/chapter36/Chapter36Application.java b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/Chapter36Application.java
new file mode 100644
index 00000000..2ce02b15
--- /dev/null
+++ b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/Chapter36Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter36;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@MapperScan("com.didispace.chapter36.mapper")
+@SpringBootApplication
+public class Chapter36Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter36Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-6/src/main/java/com/didispace/chapter36/entity/User.java b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/entity/User.java
new file mode 100644
index 00000000..6196ed6d
--- /dev/null
+++ b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/entity/User.java
@@ -0,0 +1,20 @@
+package com.didispace.chapter36.entity;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+@Data
+@NoArgsConstructor
+public class User {
+
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-6/src/main/java/com/didispace/chapter36/mapper/UserMapper.java b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/mapper/UserMapper.java
new file mode 100644
index 00000000..cd361f46
--- /dev/null
+++ b/2.x/chapter3-6/src/main/java/com/didispace/chapter36/mapper/UserMapper.java
@@ -0,0 +1,18 @@
+package com.didispace.chapter36.mapper;
+
+import com.didispace.chapter36.entity.User;
+import org.apache.ibatis.annotations.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/28.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserMapper {
+
+    User findByName(@Param("name") String name);
+
+    int insert(@Param("name") String name, @Param("age") Integer age);
+
+}
diff --git a/2.x/chapter3-6/src/main/resources/application.properties b/2.x/chapter3-6/src/main/resources/application.properties
new file mode 100644
index 00000000..ec5cde49
--- /dev/null
+++ b/2.x/chapter3-6/src/main/resources/application.properties
@@ -0,0 +1,6 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+mybatis.mapper-locations=classpath:mapper/*.xml
diff --git a/2.x/chapter3-6/src/main/resources/mapper/UserMapper.xml b/2.x/chapter3-6/src/main/resources/mapper/UserMapper.xml
new file mode 100644
index 00000000..520d290e
--- /dev/null
+++ b/2.x/chapter3-6/src/main/resources/mapper/UserMapper.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.didispace.chapter36.mapper.UserMapper">
+    <select id="findByName" resultType="com.didispace.chapter36.entity.User">
+        SELECT * FROM USER WHERE NAME = #{name}
+    </select>
+
+    <insert id="insert">
+        INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})
+    </insert>
+</mapper>
\ No newline at end of file
diff --git a/2.x/chapter3-6/src/test/java/com/didispace/chapter36/Chapter36ApplicationTests.java b/2.x/chapter3-6/src/test/java/com/didispace/chapter36/Chapter36ApplicationTests.java
new file mode 100644
index 00000000..aab8acb1
--- /dev/null
+++ b/2.x/chapter3-6/src/test/java/com/didispace/chapter36/Chapter36ApplicationTests.java
@@ -0,0 +1,32 @@
+package com.didispace.chapter36;
+
+import com.didispace.chapter36.entity.User;
+import com.didispace.chapter36.mapper.UserMapper;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@Transactional
+public class Chapter36ApplicationTests {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @Test
+    @Rollback
+    public void test() throws Exception {
+        userMapper.insert("AAA", 20);
+        User u = userMapper.findByName("AAA");
+        Assert.assertEquals(20, u.getAge().intValue());
+    }
+
+}
diff --git a/2.x/chapter3-7/.gitignore b/2.x/chapter3-7/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-7/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-7/pom.xml b/2.x/chapter3-7/pom.xml
new file mode 100644
index 00000000..589d40ec
--- /dev/null
+++ b/2.x/chapter3-7/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-7</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>JdbcTemplate的多数据源配置</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-7/src/main/java/com/didispace/chapter37/Chapter37Application.java b/2.x/chapter3-7/src/main/java/com/didispace/chapter37/Chapter37Application.java
new file mode 100644
index 00000000..92be7068
--- /dev/null
+++ b/2.x/chapter3-7/src/main/java/com/didispace/chapter37/Chapter37Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter37;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter37Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter37Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter3-7/src/main/java/com/didispace/chapter37/DataSourceConfiguration.java b/2.x/chapter3-7/src/main/java/com/didispace/chapter37/DataSourceConfiguration.java
new file mode 100644
index 00000000..f821153b
--- /dev/null
+++ b/2.x/chapter3-7/src/main/java/com/didispace/chapter37/DataSourceConfiguration.java
@@ -0,0 +1,39 @@
+package com.didispace.chapter37;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceConfiguration {
+
+    @Primary
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.primary")
+    public DataSource primaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.secondary")
+    public DataSource secondaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Bean
+    public JdbcTemplate primaryJdbcTemplate(@Qualifier("primaryDataSource") DataSource primaryDataSource) {
+        return new JdbcTemplate(primaryDataSource);
+    }
+
+    @Bean
+    public JdbcTemplate secondaryJdbcTemplate(@Qualifier("secondaryDataSource") DataSource secondaryDataSource) {
+        return new JdbcTemplate(secondaryDataSource);
+    }
+
+}
diff --git a/2.x/chapter3-7/src/main/resources/application.properties b/2.x/chapter3-7/src/main/resources/application.properties
new file mode 100644
index 00000000..25937c84
--- /dev/null
+++ b/2.x/chapter3-7/src/main/resources/application.properties
@@ -0,0 +1,11 @@
+# pring boot 1.x的配置：spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.username=root
+spring.datasource.primary.password=123456
+spring.datasource.primary.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# spring boot 1.x的配置：spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.username=root
+spring.datasource.secondary.password=123456
+spring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver
\ No newline at end of file
diff --git a/2.x/chapter3-7/src/test/java/com/didispace/chapter37/Chapter37ApplicationTests.java b/2.x/chapter3-7/src/test/java/com/didispace/chapter37/Chapter37ApplicationTests.java
new file mode 100644
index 00000000..5aa8a72f
--- /dev/null
+++ b/2.x/chapter3-7/src/test/java/com/didispace/chapter37/Chapter37ApplicationTests.java
@@ -0,0 +1,46 @@
+package com.didispace.chapter37;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.test.context.junit4.SpringRunner;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter37ApplicationTests {
+
+    @Autowired
+    protected JdbcTemplate primaryJdbcTemplate;
+
+    @Autowired
+    protected JdbcTemplate secondaryJdbcTemplate;
+
+    @Before
+    public void setUp() {
+        primaryJdbcTemplate.update("DELETE  FROM  USER ");
+        secondaryJdbcTemplate.update("DELETE  FROM  USER ");
+    }
+
+    @Test
+    public void test() throws Exception {
+        // 往第一个数据源中插入 2 条数据
+        primaryJdbcTemplate.update("insert into user(name,age) values(?, ?)", "aaa", 20);
+        primaryJdbcTemplate.update("insert into user(name,age) values(?, ?)", "bbb", 30);
+
+        // 往第二个数据源中插入 1 条数据，若插入的是第一个数据源，则会主键冲突报错
+        secondaryJdbcTemplate.update("insert into user(name,age) values(?, ?)", "ccc", 20);
+
+        // 查一下第一个数据源中是否有 2 条数据，验证插入是否成功
+        Assert.assertEquals("2", primaryJdbcTemplate.queryForObject("select count(1) from user", String.class));
+
+        // 查一下第一个数据源中是否有 1 条数据，验证插入是否成功
+        Assert.assertEquals("1", secondaryJdbcTemplate.queryForObject("select count(1) from user", String.class));
+    }
+
+}
diff --git a/2.x/chapter3-8/.gitignore b/2.x/chapter3-8/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-8/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-8/pom.xml b/2.x/chapter3-8/pom.xml
new file mode 100644
index 00000000..fcb9d03a
--- /dev/null
+++ b/2.x/chapter3-8/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-8</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>Spring Data JPA的多数据源配置</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/Chapter38Application.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/Chapter38Application.java
new file mode 100644
index 00000000..d2e5f499
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/Chapter38Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter38;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class Chapter38Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter38Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/DataSourceConfiguration.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/DataSourceConfiguration.java
new file mode 100644
index 00000000..6470beb6
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/DataSourceConfiguration.java
@@ -0,0 +1,29 @@
+package com.didispace.chapter38;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceConfiguration {
+
+    @Primary
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.primary")
+    public DataSource primaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.secondary")
+    public DataSource secondaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+}
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/PrimaryConfig.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/PrimaryConfig.java
new file mode 100644
index 00000000..3bcfadc0
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/PrimaryConfig.java
@@ -0,0 +1,70 @@
+package com.didispace.chapter38;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings;
+import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
+import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+import javax.persistence.EntityManager;
+import javax.sql.DataSource;
+import java.util.Map;
+
+@Configuration
+@EnableTransactionManagement
+@EnableJpaRepositories(
+        entityManagerFactoryRef="entityManagerFactoryPrimary",
+        transactionManagerRef="transactionManagerPrimary",
+        basePackages= { "com.didispace.chapter38.p" }) //设置Repository所在位置
+public class PrimaryConfig {
+
+    @Autowired
+    @Qualifier("primaryDataSource")
+    private DataSource primaryDataSource;
+
+    @Autowired
+    private JpaProperties jpaProperties;
+    @Autowired
+    private HibernateProperties hibernateProperties;
+
+    private Map<String, Object> getVendorProperties() {
+        return hibernateProperties.determineHibernateProperties(jpaProperties.getProperties(), new HibernateSettings());
+    }
+
+    @Primary
+    @Bean(name = "entityManagerPrimary")
+    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
+        return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
+    }
+
+    @Primary
+    @Bean(name = "entityManagerFactoryPrimary")
+    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary (EntityManagerFactoryBuilder builder) {
+//        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
+//        jpaVendorAdapter.setGenerateDdl(true);
+        return builder
+                .dataSource(primaryDataSource)
+                .packages("com.didispace.chapter38.p") //设置实体类所在位置
+                .persistenceUnit("primaryPersistenceUnit")
+                .properties(getVendorProperties())
+                .build();
+    }
+
+    @Primary
+    @Bean(name = "transactionManagerPrimary")
+    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
+        return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
+    }
+
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/SecondaryConfig.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/SecondaryConfig.java
new file mode 100644
index 00000000..7b8df6a3
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/SecondaryConfig.java
@@ -0,0 +1,62 @@
+package com.didispace.chapter38;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings;
+import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
+import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+import javax.persistence.EntityManager;
+import javax.sql.DataSource;
+import java.util.Map;
+
+@Configuration
+@EnableTransactionManagement
+@EnableJpaRepositories(
+        entityManagerFactoryRef="entityManagerFactorySecondary",
+        transactionManagerRef="transactionManagerSecondary",
+        basePackages= { "com.didispace.chapter38.s" }) //设置Repository所在位置
+public class SecondaryConfig {
+
+    @Autowired
+    @Qualifier("secondaryDataSource")
+    private DataSource secondaryDataSource;
+
+    @Autowired
+    private JpaProperties jpaProperties;
+    @Autowired
+    private HibernateProperties hibernateProperties;
+
+    private Map<String, Object> getVendorProperties() {
+        return hibernateProperties.determineHibernateProperties(jpaProperties.getProperties(), new HibernateSettings());
+    }
+
+    @Bean(name = "entityManagerSecondary")
+    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
+        return entityManagerFactorySecondary(builder).getObject().createEntityManager();
+    }
+
+    @Bean(name = "entityManagerFactorySecondary")
+    public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary (EntityManagerFactoryBuilder builder) {
+        return builder
+                .dataSource(secondaryDataSource)
+                .packages("com.didispace.chapter38.s") //设置实体类所在位置
+                .persistenceUnit("secondaryPersistenceUnit")
+                .properties(getVendorProperties())
+                .build();
+    }
+
+    @Bean(name = "transactionManagerSecondary")
+    PlatformTransactionManager transactionManagerSecondary(EntityManagerFactoryBuilder builder) {
+        return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject());
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/User.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/User.java
new file mode 100644
index 00000000..83aaf3c9
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/User.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter38.p;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/UserRepository.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/UserRepository.java
new file mode 100644
index 00000000..e91080e1
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/p/UserRepository.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter38.p;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on  2020/6/22.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserRepository extends JpaRepository<User, Long> {
+
+}
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/Message.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/Message.java
new file mode 100644
index 00000000..956178b8
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/Message.java
@@ -0,0 +1,29 @@
+package com.didispace.chapter38.s;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class Message {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String title;
+    private String message;
+
+    public Message(String title, String message) {
+        this.title = title;
+        this.message = message;
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/MessageRepository.java b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/MessageRepository.java
new file mode 100644
index 00000000..13360488
--- /dev/null
+++ b/2.x/chapter3-8/src/main/java/com/didispace/chapter38/s/MessageRepository.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter38.s;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/6/22.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface MessageRepository extends JpaRepository<Message, Long> {
+
+
+}
diff --git a/2.x/chapter3-8/src/main/resources/application.properties b/2.x/chapter3-8/src/main/resources/application.properties
new file mode 100644
index 00000000..0d82f6cd
--- /dev/null
+++ b/2.x/chapter3-8/src/main/resources/application.properties
@@ -0,0 +1,16 @@
+# pring boot 1.x的配置：spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.username=root
+spring.datasource.primary.password=12345678
+spring.datasource.primary.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# spring boot 1.x的配置：spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.username=root
+spring.datasource.secondary.password=12345678
+spring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# 日志打印执行的SQL
+spring.jpa.show-sql=true
+# Hibernate的DDL策略
+spring.jpa.hibernate.ddl-auto=create-drop
diff --git a/2.x/chapter3-8/src/test/java/com/didispace/chapter38/Chapter38ApplicationTests.java b/2.x/chapter3-8/src/test/java/com/didispace/chapter38/Chapter38ApplicationTests.java
new file mode 100644
index 00000000..9c9ef3e7
--- /dev/null
+++ b/2.x/chapter3-8/src/test/java/com/didispace/chapter38/Chapter38ApplicationTests.java
@@ -0,0 +1,42 @@
+package com.didispace.chapter38;
+
+import com.didispace.chapter38.p.User;
+import com.didispace.chapter38.p.UserRepository;
+import com.didispace.chapter38.s.Message;
+import com.didispace.chapter38.s.MessageRepository;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter38ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+    @Autowired
+    private MessageRepository messageRepository;
+
+    @Test
+    public void test() throws Exception {
+        userRepository.save(new User("aaa", 10));
+        userRepository.save(new User("bbb", 20));
+        userRepository.save(new User("ccc", 30));
+        userRepository.save(new User("ddd", 40));
+        userRepository.save(new User("eee", 50));
+
+        Assert.assertEquals(5, userRepository.findAll().size());
+
+        messageRepository.save(new Message("o1", "aaaaaaaaaa"));
+        messageRepository.save(new Message("o2", "bbbbbbbbbb"));
+        messageRepository.save(new Message("o3", "cccccccccc"));
+
+        Assert.assertEquals(3, messageRepository.findAll().size());
+    }
+
+}
diff --git a/2.x/chapter3-9/.gitignore b/2.x/chapter3-9/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter3-9/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter3-9/pom.xml b/2.x/chapter3-9/pom.xml
new file mode 100644
index 00000000..c8f731ef
--- /dev/null
+++ b/2.x/chapter3-9/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter3-9</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>MyBatis的多数据源配置</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.mybatis.spring.boot</groupId>
+			<artifactId>mybatis-spring-boot-starter</artifactId>
+			<version>2.1.1</version>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/Chapter39Application.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/Chapter39Application.java
new file mode 100644
index 00000000..eb46b057
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/Chapter39Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter39;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter39Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter39Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/DataSourceConfiguration.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/DataSourceConfiguration.java
new file mode 100644
index 00000000..6eaae095
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/DataSourceConfiguration.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter39;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceConfiguration {
+
+    @Primary
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.primary")
+    public DataSource primaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+    @Bean
+    @ConfigurationProperties(prefix = "spring.datasource.secondary")
+    public DataSource secondaryDataSource() {
+        return DataSourceBuilder.create().build();
+    }
+
+}
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/PrimaryConfig.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/PrimaryConfig.java
new file mode 100644
index 00000000..f6d1bbe5
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/PrimaryConfig.java
@@ -0,0 +1,38 @@
+package com.didispace.chapter39;
+
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.mybatis.spring.SqlSessionFactoryBean;
+import org.mybatis.spring.SqlSessionTemplate;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.sql.DataSource;
+
+@Configuration
+@MapperScan(
+        basePackages = "com.didispace.chapter39.p",
+        sqlSessionFactoryRef = "sqlSessionFactoryPrimary",
+        sqlSessionTemplateRef = "sqlSessionTemplatePrimary")
+public class PrimaryConfig {
+
+    private DataSource primaryDataSource;
+
+    public PrimaryConfig(@Qualifier("primaryDataSource") DataSource primaryDataSource) {
+        this.primaryDataSource = primaryDataSource;
+    }
+
+    @Bean
+    public SqlSessionFactory sqlSessionFactoryPrimary() throws Exception {
+        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
+        bean.setDataSource(primaryDataSource);
+        return bean.getObject();
+    }
+
+    @Bean
+    public SqlSessionTemplate sqlSessionTemplatePrimary() throws Exception {
+        return new SqlSessionTemplate(sqlSessionFactoryPrimary());
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/SecondaryConfig.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/SecondaryConfig.java
new file mode 100644
index 00000000..bdb17fba
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/SecondaryConfig.java
@@ -0,0 +1,38 @@
+package com.didispace.chapter39;
+
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.mybatis.spring.SqlSessionFactoryBean;
+import org.mybatis.spring.SqlSessionTemplate;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.sql.DataSource;
+
+@Configuration
+@MapperScan(
+        basePackages = "com.didispace.chapter39.s",
+        sqlSessionFactoryRef = "sqlSessionFactorySecondary",
+        sqlSessionTemplateRef = "sqlSessionTemplateSecondary")
+public class SecondaryConfig {
+
+    private DataSource secondaryDataSource;
+
+    public SecondaryConfig(@Qualifier("secondaryDataSource") DataSource secondaryDataSource) {
+        this.secondaryDataSource = secondaryDataSource;
+    }
+
+    @Bean
+    public SqlSessionFactory sqlSessionFactorySecondary() throws Exception {
+        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
+        bean.setDataSource(secondaryDataSource);
+        return bean.getObject();
+    }
+
+    @Bean
+    public SqlSessionTemplate sqlSessionTemplateSecondary() throws Exception {
+        return new SqlSessionTemplate(sqlSessionFactorySecondary());
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/entity/UserPrimary.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/entity/UserPrimary.java
new file mode 100644
index 00000000..f4c2a299
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/entity/UserPrimary.java
@@ -0,0 +1,20 @@
+package com.didispace.chapter39.p.entity;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+@Data
+@NoArgsConstructor
+public class UserPrimary {
+
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public UserPrimary(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/mapper/UserMapperPrimary.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/mapper/UserMapperPrimary.java
new file mode 100644
index 00000000..869ab546
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/p/mapper/UserMapperPrimary.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter39.p.mapper;
+
+import com.didispace.chapter39.p.entity.UserPrimary;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/28.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserMapperPrimary {
+
+    @Select("SELECT * FROM USER WHERE NAME = #{name}")
+    UserPrimary findByName(@Param("name") String name);
+
+    @Insert("INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})")
+    int insert(@Param("name") String name, @Param("age") Integer age);
+
+    @Delete("DELETE FROM USER")
+    int deleteAll();
+
+}
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/entity/UserSecondary.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/entity/UserSecondary.java
new file mode 100644
index 00000000..fdd64dff
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/entity/UserSecondary.java
@@ -0,0 +1,20 @@
+package com.didispace.chapter39.s.entity;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+@Data
+@NoArgsConstructor
+public class UserSecondary {
+
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public UserSecondary(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/mapper/UserMapperSecondary.java b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/mapper/UserMapperSecondary.java
new file mode 100644
index 00000000..bb4b004c
--- /dev/null
+++ b/2.x/chapter3-9/src/main/java/com/didispace/chapter39/s/mapper/UserMapperSecondary.java
@@ -0,0 +1,25 @@
+package com.didispace.chapter39.s.mapper;
+
+import com.didispace.chapter39.s.entity.UserSecondary;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/2/28.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserMapperSecondary {
+
+    @Select("SELECT * FROM USER WHERE NAME = #{name}")
+    UserSecondary findByName(@Param("name") String name);
+
+    @Insert("INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})")
+    int insert(@Param("name") String name, @Param("age") Integer age);
+
+    @Delete("DELETE FROM USER")
+    int deleteAll();
+}
diff --git a/2.x/chapter3-9/src/main/resources/application.properties b/2.x/chapter3-9/src/main/resources/application.properties
new file mode 100644
index 00000000..87777023
--- /dev/null
+++ b/2.x/chapter3-9/src/main/resources/application.properties
@@ -0,0 +1,13 @@
+# pring boot 1.x的配置：spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/test1
+spring.datasource.primary.username=root
+spring.datasource.primary.password=12345678
+spring.datasource.primary.driver-class-name=com.mysql.cj.jdbc.Driver
+
+# spring boot 1.x的配置：spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/test2
+spring.datasource.secondary.username=root
+spring.datasource.secondary.password=12345678
+spring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver
+
+#mybatis.mapper-locations=classpath:mapper/*.xml
diff --git a/2.x/chapter3-9/src/main/resources/mapper.primary/UserMapper.xml b/2.x/chapter3-9/src/main/resources/mapper.primary/UserMapper.xml
new file mode 100644
index 00000000..6eae360b
--- /dev/null
+++ b/2.x/chapter3-9/src/main/resources/mapper.primary/UserMapper.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="com.didispace.chapter39.p.mapper.UserMapperPrimary">
+    <select id="findByName" resultType="com.didispace.chapter39.p.entity.UserPrimary">
+        SELECT * FROM USER WHERE NAME = #{name}
+    </select>
+
+    <insert id="insert">
+        INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})
+    </insert>
+
+</mapper>
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/main/resources/mapper.secondary/UserMapper.xml b/2.x/chapter3-9/src/main/resources/mapper.secondary/UserMapper.xml
new file mode 100644
index 00000000..361cd16e
--- /dev/null
+++ b/2.x/chapter3-9/src/main/resources/mapper.secondary/UserMapper.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="com.didispace.chapter39.s.mapper.UserMapperSecondary">
+
+    <select id="findByName" resultType="com.didispace.chapter39.s.entity.UserSecondary">
+        SELECT * FROM USER WHERE NAME = #{name}
+    </select>
+
+    <insert id="insert">
+        INSERT INTO USER(NAME, AGE) VALUES(#{name}, #{age})
+    </insert>
+
+</mapper>
\ No newline at end of file
diff --git a/2.x/chapter3-9/src/test/java/com/didispace/chapter39/Chapter39ApplicationTests.java b/2.x/chapter3-9/src/test/java/com/didispace/chapter39/Chapter39ApplicationTests.java
new file mode 100644
index 00000000..a1bd3a81
--- /dev/null
+++ b/2.x/chapter3-9/src/test/java/com/didispace/chapter39/Chapter39ApplicationTests.java
@@ -0,0 +1,60 @@
+package com.didispace.chapter39;
+
+import com.didispace.chapter39.p.entity.UserPrimary;
+import com.didispace.chapter39.p.mapper.UserMapperPrimary;
+import com.didispace.chapter39.s.entity.UserSecondary;
+import com.didispace.chapter39.s.mapper.UserMapperSecondary;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@Transactional
+public class Chapter39ApplicationTests {
+
+    @Autowired
+    private UserMapperPrimary userMapperPrimary;
+    @Autowired
+    private UserMapperSecondary userMapperSecondary;
+
+    @Before
+    public void setUp() {
+        // 清空测试表，保证每次结果一样
+        userMapperPrimary.deleteAll();
+        userMapperSecondary.deleteAll();
+    }
+
+    @Test
+    public void test() throws Exception {
+        // 往Primary数据源插入一条数据
+        userMapperPrimary.insert("AAA", 20);
+
+        // 从Primary数据源查询刚才插入的数据，配置正确就可以查询到
+        UserPrimary userPrimary = userMapperPrimary.findByName("AAA");
+        Assert.assertEquals(20, userPrimary.getAge().intValue());
+
+        // 从Secondary数据源查询刚才插入的数据，配置正确应该是查询不到的
+        UserSecondary userSecondary = userMapperSecondary.findByName("AAA");
+        Assert.assertNull(userSecondary);
+
+        // 往Secondary数据源插入一条数据
+        userMapperSecondary.insert("BBB", 20);
+
+        // 从Primary数据源查询刚才插入的数据，配置正确应该是查询不到的
+        userPrimary = userMapperPrimary.findByName("BBB");
+        Assert.assertNull(userPrimary);
+
+        // 从Secondary数据源查询刚才插入的数据，配置正确就可以查询到
+        userSecondary = userMapperSecondary.findByName("BBB");
+        Assert.assertEquals(20, userSecondary.getAge().intValue());
+    }
+
+}
diff --git a/2.x/chapter4-1/.gitignore b/2.x/chapter4-1/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter4-1/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter4-1/pom.xml b/2.x/chapter4-1/pom.xml
new file mode 100644
index 00000000..07c54958
--- /dev/null
+++ b/2.x/chapter4-1/pom.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter4-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用 Thymeleaf开发Web页面</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter4-1/src/main/java/com/didispace/chapter41/Chapter41Application.java b/2.x/chapter4-1/src/main/java/com/didispace/chapter41/Chapter41Application.java
new file mode 100644
index 00000000..8ec9c806
--- /dev/null
+++ b/2.x/chapter4-1/src/main/java/com/didispace/chapter41/Chapter41Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter41;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter41Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter41Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter4-1/src/main/java/com/didispace/chapter41/HelloController.java b/2.x/chapter4-1/src/main/java/com/didispace/chapter41/HelloController.java
new file mode 100644
index 00000000..314074d1
--- /dev/null
+++ b/2.x/chapter4-1/src/main/java/com/didispace/chapter41/HelloController.java
@@ -0,0 +1,19 @@
+package com.didispace.chapter41;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class HelloController {
+
+    @GetMapping("/")
+    public String index(ModelMap map) {
+        // 加入一个属性，用来在模板中读取
+        map.addAttribute("host", "http://blog.didispace.com");
+
+        // return模板文件的名称，对应src/main/resources/templates/index.html
+        return "index";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-1/src/main/resources/application.properties b/2.x/chapter4-1/src/main/resources/application.properties
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/2.x/chapter4-1/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/2.x/chapter4-1/src/main/resources/templates/index.html b/2.x/chapter4-1/src/main/resources/templates/index.html
new file mode 100644
index 00000000..32cbfe84
--- /dev/null
+++ b/2.x/chapter4-1/src/main/resources/templates/index.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+    <meta charset="UTF-8" />
+    <title></title>
+</head>
+<body>
+<h1 th:text="${host}">Hello World</h1>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-2/.gitignore b/2.x/chapter4-2/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter4-2/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter4-2/pom.xml b/2.x/chapter4-2/pom.xml
new file mode 100644
index 00000000..26b9d0e6
--- /dev/null
+++ b/2.x/chapter4-2/pom.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter4-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用 ECharts 绘制折线图 </description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter4-2/src/main/java/com/didispace/chapter42/Chapter42Application.java b/2.x/chapter4-2/src/main/java/com/didispace/chapter42/Chapter42Application.java
new file mode 100644
index 00000000..00b646c5
--- /dev/null
+++ b/2.x/chapter4-2/src/main/java/com/didispace/chapter42/Chapter42Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter42;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter42Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter42Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter4-2/src/main/java/com/didispace/chapter42/HelloController.java b/2.x/chapter4-2/src/main/java/com/didispace/chapter42/HelloController.java
new file mode 100644
index 00000000..0e01264b
--- /dev/null
+++ b/2.x/chapter4-2/src/main/java/com/didispace/chapter42/HelloController.java
@@ -0,0 +1,16 @@
+package com.didispace.chapter42;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class HelloController {
+
+    @GetMapping("/")
+    public String index(ModelMap map) {
+        // return模板文件的名称，对应src/main/resources/templates/index.html
+        return "index";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-2/src/main/resources/application.properties b/2.x/chapter4-2/src/main/resources/application.properties
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/2.x/chapter4-2/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/2.x/chapter4-2/src/main/resources/templates/index.html b/2.x/chapter4-2/src/main/resources/templates/index.html
new file mode 100644
index 00000000..7c8a648b
--- /dev/null
+++ b/2.x/chapter4-2/src/main/resources/templates/index.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+    <meta charset="UTF-8" />
+    <title>Spring Boot中使用ECharts</title>
+    <script src="https://cdn.bootcss.com/echarts/4.6.0/echarts.min.js"></script>
+</head>
+<body>
+<div id="main" style="width: 1000px;height:400px;"></div>
+</body>
+
+<script type="text/javascript">
+    let myChart = echarts.init(document.getElementById('main'));
+    let option = {
+        title: {
+            text: 'Spring Boot中使用ECharts'
+        },
+        tooltip: {},
+        xAxis: {
+            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
+        },
+        yAxis: {},
+        series: [{
+            data: [820, 932, 901, 934, 1290, 1330, 1320],
+            type: 'line'
+        }]
+    };
+    myChart.setOption(option);
+</script>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-3/.gitignore b/2.x/chapter4-3/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter4-3/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter4-3/pom.xml b/2.x/chapter4-3/pom.xml
new file mode 100644
index 00000000..21238608
--- /dev/null
+++ b/2.x/chapter4-3/pom.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter4-3</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>文件上传</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter4-3/src/main/java/com/didispace/chapter43/Chapter43Application.java b/2.x/chapter4-3/src/main/java/com/didispace/chapter43/Chapter43Application.java
new file mode 100644
index 00000000..f54783ed
--- /dev/null
+++ b/2.x/chapter4-3/src/main/java/com/didispace/chapter43/Chapter43Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter43;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter43Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter43Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter4-3/src/main/java/com/didispace/chapter43/UploadController.java b/2.x/chapter4-3/src/main/java/com/didispace/chapter43/UploadController.java
new file mode 100644
index 00000000..e36f32b2
--- /dev/null
+++ b/2.x/chapter4-3/src/main/java/com/didispace/chapter43/UploadController.java
@@ -0,0 +1,39 @@
+package com.didispace.chapter43;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
+@Controller
+@Slf4j
+public class UploadController {
+
+    @Value("${file.upload.path}")
+    private String path;
+
+    @GetMapping("/")
+    public String uploadPage() {
+        return "upload";
+    }
+
+    @PostMapping("/upload")
+    @ResponseBody
+    public String create(@RequestPart MultipartFile file) throws IOException {
+        String fileName = file.getOriginalFilename();
+        String filePath = path + fileName;
+
+        File dest = new File(filePath);
+        Files.copy(file.getInputStream(), dest.toPath());
+        return "Upload file success : " + dest.getAbsolutePath();
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-3/src/main/resources/application.properties b/2.x/chapter4-3/src/main/resources/application.properties
new file mode 100644
index 00000000..08991f4c
--- /dev/null
+++ b/2.x/chapter4-3/src/main/resources/application.properties
@@ -0,0 +1,5 @@
+
+spring.servlet.multipart.max-file-size=2MB
+spring.servlet.multipart.max-request-size=2MB
+
+file.upload.path=/Users/zhaiyongchao/
\ No newline at end of file
diff --git a/2.x/chapter4-3/src/main/resources/templates/upload.html b/2.x/chapter4-3/src/main/resources/templates/upload.html
new file mode 100644
index 00000000..59b8166a
--- /dev/null
+++ b/2.x/chapter4-3/src/main/resources/templates/upload.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+    <meta charset="UTF-8" />
+    <title>文件上传页面</title>
+</head>
+<body>
+<h1>文件上传页面</h1>
+<form method="post" action="/upload" enctype="multipart/form-data">
+    选择要上传的文件：<input type="file" name="file"><br>
+    <hr>
+    <input type="submit" value="提交">
+</form>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-3/src/test/java/FileTest.java b/2.x/chapter4-3/src/test/java/FileTest.java
new file mode 100644
index 00000000..d19d55e0
--- /dev/null
+++ b/2.x/chapter4-3/src/test/java/FileTest.java
@@ -0,0 +1,48 @@
+import com.didispace.chapter43.Chapter43Application;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+
+@SpringBootTest(classes = Chapter43Application.class)
+public class FileTest {
+
+    @Autowired
+    protected WebApplicationContext context;
+    protected MockMvc mvc;
+
+    @BeforeEach
+    public void setUp() {
+        mvc = MockMvcBuilders.webAppContextSetup(context).build();
+    }
+
+    @Test
+    public void uploadFile() throws Exception {
+        MockMultipartFile file = new MockMultipartFile(
+                "file",
+                "hello.txt",
+                MediaType.TEXT_PLAIN_VALUE,
+                "Hello, World!".getBytes()
+        );
+
+        final MvcResult result = mvc.perform(
+                MockMvcRequestBuilders
+                        .multipart("/upload")
+                        .file(file))
+                .andDo(print())
+                .andExpect(status().isOk())
+                .andReturn();
+    }
+
+}
diff --git a/2.x/chapter4-4/.gitignore b/2.x/chapter4-4/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter4-4/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter4-4/pom.xml b/2.x/chapter4-4/pom.xml
new file mode 100644
index 00000000..49da68de
--- /dev/null
+++ b/2.x/chapter4-4/pom.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter4-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>多文件上传</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter4-4/src/main/java/com/didispace/chapter44/Chapter44Application.java b/2.x/chapter4-4/src/main/java/com/didispace/chapter44/Chapter44Application.java
new file mode 100644
index 00000000..a0145c56
--- /dev/null
+++ b/2.x/chapter4-4/src/main/java/com/didispace/chapter44/Chapter44Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter44;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter44Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter44Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter4-4/src/main/java/com/didispace/chapter44/UploadController.java b/2.x/chapter4-4/src/main/java/com/didispace/chapter44/UploadController.java
new file mode 100644
index 00000000..82ce1741
--- /dev/null
+++ b/2.x/chapter4-4/src/main/java/com/didispace/chapter44/UploadController.java
@@ -0,0 +1,44 @@
+package com.didispace.chapter44;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
+@Controller
+@Slf4j
+public class UploadController {
+
+    @Value("${file.upload.path}")
+    private String path;
+
+    @GetMapping("/")
+    public String uploadPage() {
+        return "upload";
+    }
+
+    @PostMapping("/upload")
+    @ResponseBody
+    public String create(@RequestPart MultipartFile[] files) throws IOException {
+        StringBuffer message = new StringBuffer();
+
+        for (MultipartFile file : files) {
+            String fileName = file.getOriginalFilename();
+            String filePath = path + fileName;
+
+            File dest = new File(filePath);
+            Files.copy(file.getInputStream(), dest.toPath());
+            message.append("Upload file success : " + dest.getAbsolutePath()).append("<br>");
+        }
+        return message.toString();
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-4/src/main/resources/application.properties b/2.x/chapter4-4/src/main/resources/application.properties
new file mode 100644
index 00000000..0d9500e2
--- /dev/null
+++ b/2.x/chapter4-4/src/main/resources/application.properties
@@ -0,0 +1,5 @@
+
+spring.servlet.multipart.max-file-size=2MB
+spring.servlet.multipart.max-request-size=2MB
+
+file.upload.path=/Users/didi/
\ No newline at end of file
diff --git a/2.x/chapter4-4/src/main/resources/templates/upload.html b/2.x/chapter4-4/src/main/resources/templates/upload.html
new file mode 100644
index 00000000..b7307dac
--- /dev/null
+++ b/2.x/chapter4-4/src/main/resources/templates/upload.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+    <meta charset="UTF-8" />
+    <title>文件上传页面</title>
+</head>
+<body>
+<h1>文件上传页面</h1>
+<form method="post" action="/upload" enctype="multipart/form-data">
+    文件1：<input type="file" name="files"><br>
+    文件2：<input type="file" name="files"><br>
+    <hr>
+    <input type="submit" value="提交">
+</form>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-4/src/test/java/FileTest.java b/2.x/chapter4-4/src/test/java/FileTest.java
new file mode 100644
index 00000000..04cdeb58
--- /dev/null
+++ b/2.x/chapter4-4/src/test/java/FileTest.java
@@ -0,0 +1,11 @@
+import org.junit.jupiter.api.Test;
+
+public class FileTest {
+
+    @Test
+    public void uploadFile() throws Exception {
+
+
+    }
+
+}
diff --git a/2.x/chapter4-5/pom.xml b/2.x/chapter4-5/pom.xml
new file mode 100644
index 00000000..7120c77a
--- /dev/null
+++ b/2.x/chapter4-5/pom.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter4-5</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>Spring Security快速入门</description>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-security</artifactId>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<fork>true</fork>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter4-5/src/main/java/com/didispace/chapter45/Application.java b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/Application.java
new file mode 100644
index 00000000..00d2d076
--- /dev/null
+++ b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/Application.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter45;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+
+		SpringApplication.run(Application.class, args);
+
+	}
+
+}
diff --git a/2.x/chapter4-5/src/main/java/com/didispace/chapter45/HelloController.java b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/HelloController.java
new file mode 100644
index 00000000..849a125d
--- /dev/null
+++ b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/HelloController.java
@@ -0,0 +1,33 @@
+package com.didispace.chapter45;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@Controller
+public class HelloController {
+
+    @RequestMapping("/")
+    public String index() {
+        return "index";
+    }
+
+    @RequestMapping("/hello")
+    public String hello() {
+        return "hello";
+    }
+
+    @RequestMapping(value = "/login", method = RequestMethod.GET)
+    public String login() {
+        return "login";
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-5/src/main/java/com/didispace/chapter45/WebSecurityConfig.java b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/WebSecurityConfig.java
new file mode 100644
index 00000000..30fffef5
--- /dev/null
+++ b/2.x/chapter4-5/src/main/java/com/didispace/chapter45/WebSecurityConfig.java
@@ -0,0 +1,36 @@
+package com.didispace.chapter45;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@Configuration
+@EnableWebSecurity
+public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http
+            .authorizeRequests()
+                .antMatchers("/", "/home").permitAll()
+                .anyRequest().authenticated()
+                .and()
+            .formLogin()
+                .loginPage("/login")
+                .permitAll()
+                .and()
+            .logout()
+                .permitAll();
+    }
+
+    @Autowired
+    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
+        auth
+            .inMemoryAuthentication()
+                .withUser("user").password("password").roles("USER");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter4-5/src/main/resources/application.properties b/2.x/chapter4-5/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/2.x/chapter4-5/src/main/resources/templates/hello.html b/2.x/chapter4-5/src/main/resources/templates/hello.html
new file mode 100644
index 00000000..51477131
--- /dev/null
+++ b/2.x/chapter4-5/src/main/resources/templates/hello.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
+      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
+<head>
+    <title>Hello World!</title>
+</head>
+<body>
+<h1 th:inline="text">Hello [[${#httpServletRequest.remoteUser}]]!</h1>
+<form th:action="@{/logout}" method="post">
+    <input type="submit" value="注销"/>
+</form>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-5/src/main/resources/templates/index.html b/2.x/chapter4-5/src/main/resources/templates/index.html
new file mode 100644
index 00000000..ffe28340
--- /dev/null
+++ b/2.x/chapter4-5/src/main/resources/templates/index.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
+      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
+<head>
+    <title>Spring Security入门</title>
+</head>
+<body>
+<h1>欢迎使用Spring Security!</h1>
+
+<p>点击 <a th:href="@{/hello}">这里</a> 打个招呼吧</p>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter4-5/src/main/resources/templates/login.html b/2.x/chapter4-5/src/main/resources/templates/login.html
new file mode 100644
index 00000000..f5cbe8e2
--- /dev/null
+++ b/2.x/chapter4-5/src/main/resources/templates/login.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org"
+      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
+<head>
+    <title>Spring Security Example </title>
+</head>
+<body>
+<div th:if="${param.error}">
+    用户名或密码错
+</div>
+<div th:if="${param.logout}">
+    您已注销成功
+</div>
+<form th:action="@{/login}" method="post">
+    <div><label> 用户名 : <input type="text" name="username"/> </label></div>
+    <div><label> 密 码 : <input type="password" name="password"/> </label></div>
+    <div><input type="submit" value="登录"/></div>
+</form>
+</body>
+</html>
\ No newline at end of file
diff --git a/2.x/chapter5-1/.gitignore b/2.x/chapter5-1/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter5-1/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter5-1/pom.xml b/2.x/chapter5-1/pom.xml
new file mode 100644
index 00000000..19540eff
--- /dev/null
+++ b/2.x/chapter5-1/pom.xml
@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter5-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用进程内缓存</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-cache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter5-1/src/main/java/com/didispace/chapter51/Chapter51Application.java b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/Chapter51Application.java
new file mode 100644
index 00000000..b855c592
--- /dev/null
+++ b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/Chapter51Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter51;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+@EnableCaching
+@SpringBootApplication
+public class Chapter51Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter51Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter5-1/src/main/java/com/didispace/chapter51/User.java b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/User.java
new file mode 100644
index 00000000..55ae4a76
--- /dev/null
+++ b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/User.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter51;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter5-1/src/main/java/com/didispace/chapter51/UserRepository.java b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/UserRepository.java
new file mode 100644
index 00000000..2785e7ae
--- /dev/null
+++ b/2.x/chapter5-1/src/main/java/com/didispace/chapter51/UserRepository.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter51;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/7/13.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@CacheConfig(cacheNames = "users")
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Cacheable
+    User findByName(String name);
+
+    User findByNameAndAge(String name, Integer age);
+
+    @Query("from User u where u.name=:name")
+    User findUser(@Param("name") String name);
+
+}
diff --git a/2.x/chapter5-1/src/main/resources/application.properties b/2.x/chapter5-1/src/main/resources/application.properties
new file mode 100644
index 00000000..ba1e5990
--- /dev/null
+++ b/2.x/chapter5-1/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=create-drop
\ No newline at end of file
diff --git a/2.x/chapter5-1/src/test/java/com/didispace/chapter51/Chapter51ApplicationTests.java b/2.x/chapter5-1/src/test/java/com/didispace/chapter51/Chapter51ApplicationTests.java
new file mode 100644
index 00000000..3d4dabbd
--- /dev/null
+++ b/2.x/chapter5-1/src/test/java/com/didispace/chapter51/Chapter51ApplicationTests.java
@@ -0,0 +1,34 @@
+package com.didispace.chapter51;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cache.CacheManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter51ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    public void test() throws Exception {
+        // 创建1条记录
+        userRepository.save(new User("AAA", 10));
+
+        User u1 = userRepository.findByName("AAA");
+        System.out.println("第一次查询：" + u1.getAge());
+
+        User u2 = userRepository.findByName("AAA");
+        System.out.println("第二次查询：" + u2.getAge());
+    }
+
+}
diff --git a/2.x/chapter5-2/.gitignore b/2.x/chapter5-2/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter5-2/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter5-2/pom.xml b/2.x/chapter5-2/pom.xml
new file mode 100644
index 00000000..affc2e9c
--- /dev/null
+++ b/2.x/chapter5-2/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter5-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用进程内缓存 EhCache</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-cache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>net.sf.ehcache</groupId>
+			<artifactId>ehcache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter5-2/src/main/java/com/didispace/chapter52/Chapter52Application.java b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/Chapter52Application.java
new file mode 100644
index 00000000..e4842885
--- /dev/null
+++ b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/Chapter52Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter52;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+@EnableCaching
+@SpringBootApplication
+public class Chapter52Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter52Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter5-2/src/main/java/com/didispace/chapter52/User.java b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/User.java
new file mode 100644
index 00000000..9fb641f0
--- /dev/null
+++ b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/User.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter52;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter5-2/src/main/java/com/didispace/chapter52/UserRepository.java b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/UserRepository.java
new file mode 100644
index 00000000..4dad3d06
--- /dev/null
+++ b/2.x/chapter5-2/src/main/java/com/didispace/chapter52/UserRepository.java
@@ -0,0 +1,21 @@
+package com.didispace.chapter52;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/7/14.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@CacheConfig(cacheNames = "users")
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Cacheable
+    User findByName(String name);
+
+}
diff --git a/2.x/chapter5-2/src/main/resources/application.properties b/2.x/chapter5-2/src/main/resources/application.properties
new file mode 100644
index 00000000..ba1e5990
--- /dev/null
+++ b/2.x/chapter5-2/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=create-drop
\ No newline at end of file
diff --git a/2.x/chapter5-2/src/main/resources/ehcache.xml b/2.x/chapter5-2/src/main/resources/ehcache.xml
new file mode 100644
index 00000000..c178cc9f
--- /dev/null
+++ b/2.x/chapter5-2/src/main/resources/ehcache.xml
@@ -0,0 +1,9 @@
+<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="ehcache.xsd">
+
+    <cache name="users"
+           maxEntriesLocalHeap="200"
+           timeToLiveSeconds="600">
+    </cache>
+
+</ehcache>
\ No newline at end of file
diff --git a/2.x/chapter5-2/src/test/java/com/didispace/chapter52/Chapter52ApplicationTests.java b/2.x/chapter5-2/src/test/java/com/didispace/chapter52/Chapter52ApplicationTests.java
new file mode 100644
index 00000000..76c505c9
--- /dev/null
+++ b/2.x/chapter5-2/src/test/java/com/didispace/chapter52/Chapter52ApplicationTests.java
@@ -0,0 +1,36 @@
+package com.didispace.chapter52;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cache.CacheManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter52ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    public void test() throws Exception {
+        System.out.println("CacheManager type : " + cacheManager.getClass());
+
+        // 创建1条记录
+        userRepository.save(new User("AAA", 10));
+
+        User u1 = userRepository.findByName("AAA");
+        System.out.println("第一次查询：" + u1.getAge());
+
+        User u2 = userRepository.findByName("AAA");
+        System.out.println("第二次查询：" + u2.getAge());
+    }
+
+}
diff --git a/2.x/chapter5-3/.gitignore b/2.x/chapter5-3/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter5-3/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter5-3/pom.xml b/2.x/chapter5-3/pom.xml
new file mode 100644
index 00000000..5c729543
--- /dev/null
+++ b/2.x/chapter5-3/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter5-3</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用EhCache缓存集群</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-cache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>net.sf.ehcache</groupId>
+			<artifactId>ehcache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter5-3/src/main/java/com/didispace/chapter53/Chapter53Application.java b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/Chapter53Application.java
new file mode 100644
index 00000000..3abe9f33
--- /dev/null
+++ b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/Chapter53Application.java
@@ -0,0 +1,50 @@
+package com.didispace.chapter53;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.rmi.registry.LocateRegistry;
+
+@EnableCaching
+@SpringBootApplication
+public class Chapter53Application {
+
+	public static void main(String[] args) throws Exception {
+//		LocateRegistry.createRegistry(Integer.valueOf(System.getProperty("rmi.port")));
+		SpringApplication.run(Chapter53Application.class, args);
+	}
+
+	@RestController
+	static class HelloController {
+
+		@Autowired
+		private UserRepository userRepository;
+
+		@GetMapping("/create")
+		public void create() {
+			userRepository.save(new User("AAA", 10));
+		}
+
+		@GetMapping("/update")
+		public User update() {
+			User u1 = userRepository.findByName("AAA");
+			u1.setAge(20);
+			u1 = userRepository.save(u1);
+			return u1;
+		}
+
+		@GetMapping("/find")
+		public User find() {
+			User u1 = userRepository.findByName("AAA");
+			System.out.println("查询AAA用户：" + u1.getAge());
+			return u1;
+		}
+
+	}
+
+}
diff --git a/2.x/chapter5-3/src/main/java/com/didispace/chapter53/User.java b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/User.java
new file mode 100644
index 00000000..2986b7d4
--- /dev/null
+++ b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/User.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter53;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import java.io.Serializable;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User implements Serializable {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
diff --git a/2.x/chapter5-3/src/main/java/com/didispace/chapter53/UserRepository.java b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/UserRepository.java
new file mode 100644
index 00000000..4d52745e
--- /dev/null
+++ b/2.x/chapter5-3/src/main/java/com/didispace/chapter53/UserRepository.java
@@ -0,0 +1,21 @@
+package com.didispace.chapter53;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/7/16.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@CacheConfig(cacheNames = "users")
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Cacheable
+    User findByName(String name);
+
+}
diff --git a/2.x/chapter5-3/src/main/resources/application.properties b/2.x/chapter5-3/src/main/resources/application.properties
new file mode 100644
index 00000000..43e74c79
--- /dev/null
+++ b/2.x/chapter5-3/src/main/resources/application.properties
@@ -0,0 +1,17 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=create
+
+#logging.level.net.sf.ehcache=debug
+
+# 不同实例的配置
+#spring.cache.ehcache.config=classpath:ehcache-1.xml
+#spring.cache.ehcache.config=classpath:ehcache-2.xml
+
+# 用不同命令启动不同实例
+#-Dserver.port=8001 -Dspring.cache.ehcache.config=classpath:ehcache-1.xml
+#-Dserver.port=8002 -Dspring.cache.ehcache.config=classpath:ehcache-2.xml
diff --git a/2.x/chapter5-3/src/main/resources/ehcache-1.xml b/2.x/chapter5-3/src/main/resources/ehcache-1.xml
new file mode 100644
index 00000000..fbc88162
--- /dev/null
+++ b/2.x/chapter5-3/src/main/resources/ehcache-1.xml
@@ -0,0 +1,29 @@
+<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="ehcache.xsd">
+
+    <defaultCache maxElementsInMemory="10000" eternal="false" timeToIdleSeconds="600" timeToLiveSeconds="600" overflowToDisk="true" />
+
+    <cache name="users"
+           maxEntriesLocalHeap="200"
+           timeToLiveSeconds="600">
+        <cacheEventListenerFactory
+                class="net.sf.ehcache.distribution.RMICacheReplicatorFactory"
+                properties="replicateAsynchronously=true,
+            replicatePuts=true,
+            replicateUpdates=true,
+            replicateUpdatesViaCopy=false,
+            replicateRemovals=true "/>
+
+        <bootstrapCacheLoaderFactory class="net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory"
+                                     properties="bootstrapAsynchronously=true" />
+    </cache>
+
+    <cacheManagerPeerProviderFactory
+            class="net.sf.ehcache.distribution.RMICacheManagerPeerProviderFactory"
+            properties="hostName=10.10.0.101,
+                        port=40001,
+                        socketTimeoutMillis=2000,
+                        peerDiscovery=manual,
+                        rmiUrls=//10.10.0.102:40001/users" />
+
+</ehcache>
\ No newline at end of file
diff --git a/2.x/chapter5-3/src/main/resources/ehcache-2.xml b/2.x/chapter5-3/src/main/resources/ehcache-2.xml
new file mode 100644
index 00000000..878b6be2
--- /dev/null
+++ b/2.x/chapter5-3/src/main/resources/ehcache-2.xml
@@ -0,0 +1,29 @@
+<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="ehcache.xsd">
+
+    <defaultCache maxElementsInMemory="10000" eternal="false" timeToIdleSeconds="600" timeToLiveSeconds="600" overflowToDisk="true" />
+
+    <cache name="users"
+           maxEntriesLocalHeap="200"
+           timeToLiveSeconds="600">
+        <cacheEventListenerFactory
+                class="net.sf.ehcache.distribution.RMICacheReplicatorFactory"
+                properties="replicateAsynchronously=true,
+            replicatePuts=true,
+            replicateUpdates=true,
+            replicateUpdatesViaCopy=false,
+            replicateRemovals=true "/>
+
+        <bootstrapCacheLoaderFactory class="net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory"
+                                     properties="bootstrapAsynchronously=true" />
+    </cache>
+
+    <cacheManagerPeerProviderFactory
+            class="net.sf.ehcache.distribution.RMICacheManagerPeerProviderFactory"
+            properties="hostName=10.10.0.102,
+                        port=40001,
+                        socketTimeoutMillis=2000,
+                        peerDiscovery=manual,
+                        rmiUrls=//10.10.0.101:40001/users" />
+
+</ehcache>
\ No newline at end of file
diff --git a/2.x/chapter5-3/src/test/java/com/didispace/chapter53/Chapter53ApplicationTests.java b/2.x/chapter5-3/src/test/java/com/didispace/chapter53/Chapter53ApplicationTests.java
new file mode 100644
index 00000000..0e9c2939
--- /dev/null
+++ b/2.x/chapter5-3/src/test/java/com/didispace/chapter53/Chapter53ApplicationTests.java
@@ -0,0 +1,36 @@
+package com.didispace.chapter53;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cache.CacheManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter53ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    public void test() throws Exception {
+        System.out.println("CacheManager type : " + cacheManager.getClass());
+
+        // 创建1条记录
+        userRepository.save(new User("AAA", 10));
+
+        User u1 = userRepository.findByName("AAA");
+        System.out.println("第一次查询：" + u1.getAge());
+
+        User u2 = userRepository.findByName("AAA");
+        System.out.println("第二次查询：" + u2.getAge());
+    }
+
+}
diff --git a/2.x/chapter5-4/.gitignore b/2.x/chapter5-4/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter5-4/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter5-4/pom.xml b/2.x/chapter5-4/pom.xml
new file mode 100644
index 00000000..1f4de65e
--- /dev/null
+++ b/2.x/chapter5-4/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter5-4</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用集中式缓存Redis</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-redis</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-pool2</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter5-4/src/main/java/com/didispace/chapter54/Chapter54Application.java b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/Chapter54Application.java
new file mode 100644
index 00000000..f2789f8b
--- /dev/null
+++ b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/Chapter54Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter54;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+@EnableCaching
+@SpringBootApplication
+public class Chapter54Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter54Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter5-4/src/main/java/com/didispace/chapter54/User.java b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/User.java
new file mode 100644
index 00000000..11e2dc13
--- /dev/null
+++ b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/User.java
@@ -0,0 +1,27 @@
+package com.didispace.chapter54;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import java.io.Serializable;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class User implements Serializable {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter5-4/src/main/java/com/didispace/chapter54/UserRepository.java b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/UserRepository.java
new file mode 100644
index 00000000..4b14b113
--- /dev/null
+++ b/2.x/chapter5-4/src/main/java/com/didispace/chapter54/UserRepository.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter54;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2020/7/26.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@CacheConfig(cacheNames = "users")
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Cacheable
+    User findByName(String name);
+
+    User findByNameAndAge(String name, Integer age);
+
+    @Query("from User u where u.name=:name")
+    User findUser(@Param("name") String name);
+
+}
diff --git a/2.x/chapter5-4/src/main/resources/application.properties b/2.x/chapter5-4/src/main/resources/application.properties
new file mode 100644
index 00000000..7136291e
--- /dev/null
+++ b/2.x/chapter5-4/src/main/resources/application.properties
@@ -0,0 +1,16 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=12345678
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+
+spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=create-drop
+
+spring.redis.host=localhost
+spring.redis.port=6379
+spring.redis.lettuce.pool.max-idle=8
+spring.redis.lettuce.pool.max-active=8
+spring.redis.lettuce.pool.max-wait=-1ms
+spring.redis.lettuce.pool.min-idle=0
+spring.redis.lettuce.shutdown-timeout=100ms
diff --git a/2.x/chapter5-4/src/test/java/com/didispace/chapter54/Chapter54ApplicationTests.java b/2.x/chapter5-4/src/test/java/com/didispace/chapter54/Chapter54ApplicationTests.java
new file mode 100644
index 00000000..de5a7185
--- /dev/null
+++ b/2.x/chapter5-4/src/test/java/com/didispace/chapter54/Chapter54ApplicationTests.java
@@ -0,0 +1,36 @@
+package com.didispace.chapter54;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cache.CacheManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@Slf4j
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Chapter54ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    public void test() throws Exception {
+        System.out.println("CacheManager type : " + cacheManager.getClass());
+
+        // 创建1条记录
+        userRepository.save(new User("AAA", 10));
+
+        User u1 = userRepository.findByName("AAA");
+        System.out.println("第一次查询：" + u1.getAge());
+
+        User u2 = userRepository.findByName("AAA");
+        System.out.println("第二次查询：" + u2.getAge());
+    }
+
+}
diff --git a/2.x/chapter5-5/.gitignore b/2.x/chapter5-5/.gitignore
new file mode 100644
index 00000000..153c9335
--- /dev/null
+++ b/2.x/chapter5-5/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/2.x/chapter5-5/pom.xml b/2.x/chapter5-5/pom.xml
new file mode 100644
index 00000000..dc1d2874
--- /dev/null
+++ b/2.x/chapter5-5/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter5-5</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用Redis的发布订阅</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-redis</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-pool2</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter5-5/src/main/java/com/didispace/chapter55/Chapter55Application.java b/2.x/chapter5-5/src/main/java/com/didispace/chapter55/Chapter55Application.java
new file mode 100644
index 00000000..8da3b8b0
--- /dev/null
+++ b/2.x/chapter5-5/src/main/java/com/didispace/chapter55/Chapter55Application.java
@@ -0,0 +1,61 @@
+package com.didispace.chapter55;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.redis.connection.Message;
+import org.springframework.data.redis.connection.MessageListener;
+import org.springframework.data.redis.connection.RedisConnection;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.nio.charset.StandardCharsets;
+
+@SpringBootApplication
+public class Chapter55Application {
+
+    private static String CHANNEL = "didispace";
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter55Application.class, args);
+    }
+
+    @RestController
+    static class RedisController {
+
+        private RedisTemplate<String, String> redisTemplate;
+
+        public RedisController(RedisTemplate<String, String> redisTemplate) {
+            this.redisTemplate = redisTemplate;
+        }
+
+        @GetMapping("/publish")
+        public void publish(@RequestParam String message) {
+            // 发送消息
+            redisTemplate.convertAndSend(CHANNEL, message);
+        }
+
+    }
+
+    @Slf4j
+    @Service
+    static class MessageSubscriber {
+
+        public MessageSubscriber(RedisTemplate redisTemplate) {
+            RedisConnection redisConnection = redisTemplate.getConnectionFactory().getConnection();
+            redisConnection.subscribe(new MessageListener() {
+                @Override
+                public void onMessage(Message message, byte[] bytes) {
+                    // 收到消息的处理逻辑
+                    log.info("Receive message : " + message);
+                }
+            }, CHANNEL.getBytes(StandardCharsets.UTF_8));
+
+        }
+
+    }
+
+}
diff --git a/2.x/chapter5-5/src/main/resources/application.properties b/2.x/chapter5-5/src/main/resources/application.properties
new file mode 100644
index 00000000..2992f608
--- /dev/null
+++ b/2.x/chapter5-5/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.redis.host=localhost
+spring.redis.port=6379
+spring.redis.lettuce.pool.max-idle=8
+spring.redis.lettuce.pool.max-active=8
+spring.redis.lettuce.pool.max-wait=-1ms
+spring.redis.lettuce.pool.min-idle=0
+spring.redis.lettuce.shutdown-timeout=100ms
diff --git a/2.x/chapter6-1/pom.xml b/2.x/chapter6-1/pom.xml
new file mode 100755
index 00000000..10a0116e
--- /dev/null
+++ b/2.x/chapter6-1/pom.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter6-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用MongoDB</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-mongodb</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/2.x/chapter6-1/src/main/java/com/didispace/chapter61/Chapter61Application.java b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/Chapter61Application.java
new file mode 100755
index 00000000..dfd534eb
--- /dev/null
+++ b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/Chapter61Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter61;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter61Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter61Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter6-1/src/main/java/com/didispace/chapter61/User.java b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/User.java
new file mode 100644
index 00000000..e94f10c0
--- /dev/null
+++ b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/User.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter61;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.springframework.data.annotation.Id;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+@Data
+@AllArgsConstructor
+public class User {
+
+    @Id
+    private Long id;
+
+    private String username;
+    private Integer age;
+
+}
diff --git a/2.x/chapter6-1/src/main/java/com/didispace/chapter61/UserRepository.java b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/UserRepository.java
new file mode 100644
index 00000000..f1336f96
--- /dev/null
+++ b/2.x/chapter6-1/src/main/java/com/didispace/chapter61/UserRepository.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter61;
+
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ */
+public interface UserRepository extends MongoRepository<User, Long> {
+
+    User findByUsername(String username);
+
+}
diff --git a/2.x/chapter6-1/src/main/resources/application.properties b/2.x/chapter6-1/src/main/resources/application.properties
new file mode 100644
index 00000000..0e2f083f
--- /dev/null
+++ b/2.x/chapter6-1/src/main/resources/application.properties
@@ -0,0 +1,3 @@
+spring.data.mongodb.uri=mongodb://localhost:27017/test
+
+
diff --git a/2.x/chapter6-1/src/test/java/com/didispace/chapter61/ApplicationTests.java b/2.x/chapter6-1/src/test/java/com/didispace/chapter61/ApplicationTests.java
new file mode 100755
index 00000000..e1ee421a
--- /dev/null
+++ b/2.x/chapter6-1/src/test/java/com/didispace/chapter61/ApplicationTests.java
@@ -0,0 +1,35 @@
+package com.didispace.chapter61;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest(classes = Chapter61Application.class)
+public class ApplicationTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    public void test() throws Exception {
+        userRepository.deleteAll();
+
+        // 创建三个User，并验证User总数
+        userRepository.save(new User(1L, "didi", 30));
+        userRepository.save(new User(2L, "mama", 40));
+        userRepository.save(new User(3L, "kaka", 50));
+        Assertions.assertEquals(3, userRepository.findAll().size());
+
+        // 删除一个User，再验证User总数
+        User u = userRepository.findById(1L).get();
+        userRepository.delete(u);
+        Assertions.assertEquals(2, userRepository.findAll().size());
+
+        // 删除一个User，再验证User总数
+        u = userRepository.findByUsername("mama");
+        userRepository.delete(u);
+        Assertions.assertEquals(1, userRepository.findAll().size());
+    }
+
+}
diff --git a/2.x/chapter6-2/pom.xml b/2.x/chapter6-2/pom.xml
new file mode 100644
index 00000000..dc1b63bd
--- /dev/null
+++ b/2.x/chapter6-2/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter6-2</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+	<description>使用轻量级树状存储 LDAP</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-ldap</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.unboundid</groupId>
+			<artifactId>unboundid-ldapsdk</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Chapter62Application.java b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Chapter62Application.java
new file mode 100644
index 00000000..5baa9594
--- /dev/null
+++ b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Chapter62Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter62;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter62Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter62Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Person.java b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Person.java
new file mode 100644
index 00000000..cc078f67
--- /dev/null
+++ b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/Person.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter62;
+
+import lombok.Data;
+import org.springframework.ldap.odm.annotations.*;
+
+import javax.naming.Name;
+
+@Entry(base = "ou=people,dc=didispace,dc=com", objectClasses = "inetOrgPerson")
+@Data
+public class Person {
+
+    @Id
+    private Name id;
+    @DnAttribute(value = "uid", index = 3)
+    private String uid;
+    @Attribute(name = "cn")
+    private String commonName;
+    @Attribute(name = "sn")
+    private String userName;
+    private String userPassword;
+
+}
diff --git a/2.x/chapter6-2/src/main/java/com/didispace/chapter62/PersonRepository.java b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/PersonRepository.java
new file mode 100644
index 00000000..53258324
--- /dev/null
+++ b/2.x/chapter6-2/src/main/java/com/didispace/chapter62/PersonRepository.java
@@ -0,0 +1,10 @@
+package com.didispace.chapter62;
+
+import org.springframework.data.repository.CrudRepository;
+
+import javax.naming.Name;
+
+public interface PersonRepository extends CrudRepository<Person, Name> {
+
+
+}
\ No newline at end of file
diff --git a/2.x/chapter6-2/src/main/resources/application.properties b/2.x/chapter6-2/src/main/resources/application.properties
new file mode 100644
index 00000000..d2726e89
--- /dev/null
+++ b/2.x/chapter6-2/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+#spring.ldap.urls=ldap://localhost:1235
+#spring.ldap.base=dc=didispace,dc=com
+#spring.ldap.username=didispace
+#spring.ldap.password=123456
diff --git a/2.x/chapter6-2/src/test/java/com/didispace/chapter62/ApplicationTests.java b/2.x/chapter6-2/src/test/java/com/didispace/chapter62/ApplicationTests.java
new file mode 100644
index 00000000..b1e2a2fd
--- /dev/null
+++ b/2.x/chapter6-2/src/test/java/com/didispace/chapter62/ApplicationTests.java
@@ -0,0 +1,38 @@
+package com.didispace.chapter62;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@Slf4j
+@SpringBootTest
+public class ApplicationTests {
+
+    @Autowired
+    private PersonRepository personRepository;
+
+    @Test
+    public void findAll() {
+
+        personRepository.findAll().forEach(p -> {
+            System.out.println(p);
+        });
+
+    }
+
+    @Test
+    public void save() {
+        Person person = new Person();
+        person.setUid("uid:1");
+        person.setUserName("AAA");
+        person.setCommonName("aaa");
+        person.setUserPassword("123456");
+        personRepository.save(person);
+
+        personRepository.findAll().forEach(p -> {
+            System.out.println(p);
+        });
+    }
+
+}
diff --git a/2.x/chapter6-2/src/test/resources/application.properties b/2.x/chapter6-2/src/test/resources/application.properties
new file mode 100644
index 00000000..55e19357
--- /dev/null
+++ b/2.x/chapter6-2/src/test/resources/application.properties
@@ -0,0 +1,3 @@
+spring.ldap.embedded.ldif=classpath:ldap-server.ldif
+spring.ldap.embedded.base-dn=dc=didispace,dc=com
+
diff --git a/2.x/chapter6-2/src/test/resources/ldap-server.ldif b/2.x/chapter6-2/src/test/resources/ldap-server.ldif
new file mode 100644
index 00000000..353a4939
--- /dev/null
+++ b/2.x/chapter6-2/src/test/resources/ldap-server.ldif
@@ -0,0 +1,20 @@
+dn: dc=didispace,dc=com
+objectClass: top
+objectClass: domain
+objectclass: extensibleObject
+dc: didispace
+
+dn: ou=people,dc=didispace,dc=com
+objectclass: top
+objectclass: organizationalUnit
+ou: people
+
+dn: uid=ben,ou=people,dc=didispace,dc=com
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: didi
+sn: zhaiyongchao
+uid: didi
+userPassword: {SHA}nFCebWjxfaLbHHG1Qk5UU4trbvQ=
diff --git a/2.x/chapter6-3/pom.xml b/2.x/chapter6-3/pom.xml
new file mode 100644
index 00000000..686e3150
--- /dev/null
+++ b/2.x/chapter6-3/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter6-3</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+    <description>使用时序数据库InfluxDB</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.influxdb</groupId>
+            <artifactId>influxdb-java</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Chapter63Application.java b/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Chapter63Application.java
new file mode 100644
index 00000000..54cc0e22
--- /dev/null
+++ b/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Chapter63Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter63;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@EnableScheduling
+@SpringBootApplication
+public class Chapter63Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Chapter63Application.class, args);
+	}
+
+}
diff --git a/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Monitor.java b/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Monitor.java
new file mode 100644
index 00000000..fd62dc20
--- /dev/null
+++ b/2.x/chapter6-3/src/main/java/com/didispace/chapter63/Monitor.java
@@ -0,0 +1,43 @@
+package com.didispace.chapter63;
+
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.influxdb.InfluxDB;
+import org.influxdb.dto.Point;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Created by 程序猿DD on 2021/8/2.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+@Service
+@AllArgsConstructor
+@Slf4j
+public class Monitor {
+
+    private InfluxDB influxDB;
+
+    @Scheduled(fixedRate = 5000)
+    public void writeQPS() {
+        // 模拟要上报的统计数据
+        int count = (int) (Math.random() * 100);
+
+        Point point = Point.measurement("ApiQPS")     // ApiQPS表
+                .tag("url", "/hello")  // url字段
+                .addField("count", count)        // 统计数据
+                .time(System.currentTimeMillis(), TimeUnit.MILLISECONDS)  // 时间
+                .build();
+
+        // 往test库写数据
+        influxDB.write("test", "autogen", point);
+
+        log.info("上报统计数据：" + count);
+    }
+
+}
diff --git a/2.x/chapter6-3/src/main/resources/application.properties b/2.x/chapter6-3/src/main/resources/application.properties
new file mode 100644
index 00000000..0df52b44
--- /dev/null
+++ b/2.x/chapter6-3/src/main/resources/application.properties
@@ -0,0 +1,5 @@
+
+spring.influx.url=http://localhost:8086
+spring.influx.user=admin
+spring.influx.password=
+
diff --git a/2.x/chapter6-3/src/test/java/com/didispace/chapter63/ApplicationTests.java b/2.x/chapter6-3/src/test/java/com/didispace/chapter63/ApplicationTests.java
new file mode 100644
index 00000000..4720d3cc
--- /dev/null
+++ b/2.x/chapter6-3/src/test/java/com/didispace/chapter63/ApplicationTests.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter63;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@Slf4j
+@SpringBootTest
+public class ApplicationTests {
+
+    @Test
+    public void findAll() {
+
+    }
+
+    @Test
+    public void save() {
+
+    }
+
+}
diff --git a/2.x/chapter6-4/pom.xml b/2.x/chapter6-4/pom.xml
new file mode 100644
index 00000000..c1683b06
--- /dev/null
+++ b/2.x/chapter6-4/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter6-4</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+    <description>使用PostgreSQL数据库</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter6-4/src/main/java/com/didispace/chapter64/Chapter64Application.java b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/Chapter64Application.java
new file mode 100644
index 00000000..83ebf477
--- /dev/null
+++ b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/Chapter64Application.java
@@ -0,0 +1,14 @@
+package com.didispace.chapter64;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@SpringBootApplication
+public class Chapter64Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter64Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfo.java b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfo.java
new file mode 100644
index 00000000..cc83d361
--- /dev/null
+++ b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfo.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter64;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class UserInfo {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private Integer age;
+
+    public UserInfo(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+}
\ No newline at end of file
diff --git a/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfoRepository.java b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfoRepository.java
new file mode 100644
index 00000000..85214e24
--- /dev/null
+++ b/2.x/chapter6-4/src/main/java/com/didispace/chapter64/UserInfoRepository.java
@@ -0,0 +1,22 @@
+package com.didispace.chapter64;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+/**
+ * Created by 程序猿DD/翟永超 on 2021/10/08.
+ * <p>
+ * Blog: http://blog.didispace.com/
+ * Github: https://github.com/dyc87112/
+ */
+public interface UserInfoRepository extends JpaRepository<UserInfo, Long> {
+
+    UserInfo findByName(String name);
+
+    UserInfo findByNameAndAge(String name, Integer age);
+
+    @Query("from UserInfo u where u.name=:name")
+    UserInfo findUser(@Param("name") String name);
+
+}
diff --git a/2.x/chapter6-4/src/main/resources/application.properties b/2.x/chapter6-4/src/main/resources/application.properties
new file mode 100644
index 00000000..3c000bf2
--- /dev/null
+++ b/2.x/chapter6-4/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:postgresql://localhost:5432/test
+spring.datasource.username=postgres
+spring.datasource.password=123456
+spring.datasource.driver-class-name=org.postgresql.Driver
+
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.properties.hibernate.hbm2ddl.auto=create
\ No newline at end of file
diff --git a/2.x/chapter6-4/src/test/java/com/didispace/chapter64/ApplicationTests.java b/2.x/chapter6-4/src/test/java/com/didispace/chapter64/ApplicationTests.java
new file mode 100644
index 00000000..1ae64fb4
--- /dev/null
+++ b/2.x/chapter6-4/src/test/java/com/didispace/chapter64/ApplicationTests.java
@@ -0,0 +1,51 @@
+package com.didispace.chapter64;
+
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@Slf4j
+@SpringBootTest
+public class ApplicationTests {
+
+    @Autowired
+    private UserInfoRepository userRepository;
+
+    @Test
+    public void test() throws Exception {
+        // 创建10条记录
+        userRepository.save(new UserInfo("AAA", 10));
+        userRepository.save(new UserInfo("BBB", 20));
+        userRepository.save(new UserInfo("CCC", 30));
+        userRepository.save(new UserInfo("DDD", 40));
+        userRepository.save(new UserInfo("EEE", 50));
+        userRepository.save(new UserInfo("FFF", 60));
+        userRepository.save(new UserInfo("GGG", 70));
+        userRepository.save(new UserInfo("HHH", 80));
+        userRepository.save(new UserInfo("III", 90));
+        userRepository.save(new UserInfo("JJJ", 100));
+
+        // 测试findAll, 查询所有记录
+        Assertions.assertEquals(10, userRepository.findAll().size());
+
+        // 测试findByName, 查询姓名为FFF的User
+        Assertions.assertEquals(60, userRepository.findByName("FFF").getAge().longValue());
+
+        // 测试findUser, 查询姓名为FFF的User
+        Assertions.assertEquals(60, userRepository.findUser("FFF").getAge().longValue());
+
+        // 测试findByNameAndAge, 查询姓名为FFF并且年龄为60的User
+        Assertions.assertEquals("FFF", userRepository.findByNameAndAge("FFF", 60).getName());
+
+        // 测试删除姓名为AAA的User
+        userRepository.delete(userRepository.findByName("AAA"));
+
+        // 测试findAll, 查询所有记录, 验证上面的删除是否成功
+        Assertions.assertEquals(9, userRepository.findAll().size());
+
+    }
+
+}
diff --git a/2.x/chapter7-1/pom.xml b/2.x/chapter7-1/pom.xml
new file mode 100755
index 00000000..fc9142ad
--- /dev/null
+++ b/2.x/chapter7-1/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-1</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>使用@Scheduled实现定时任务</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-1/src/main/java/com/didispace/chapter71/Chapter71Application.java b/2.x/chapter7-1/src/main/java/com/didispace/chapter71/Chapter71Application.java
new file mode 100755
index 00000000..95fd0d2d
--- /dev/null
+++ b/2.x/chapter7-1/src/main/java/com/didispace/chapter71/Chapter71Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter71;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@EnableScheduling
+@SpringBootApplication
+public class Chapter71Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter71Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-1/src/main/java/com/didispace/chapter71/ScheduledTasks.java b/2.x/chapter7-1/src/main/java/com/didispace/chapter71/ScheduledTasks.java
new file mode 100644
index 00000000..27f1d0db
--- /dev/null
+++ b/2.x/chapter7-1/src/main/java/com/didispace/chapter71/ScheduledTasks.java
@@ -0,0 +1,24 @@
+package com.didispace.chapter71;
+
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+@Slf4j
+@Component
+@AllArgsConstructor
+public class ScheduledTasks {
+
+    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
+
+
+    @Scheduled(fixedRate = 5000)
+    public void reportCurrentTime() {
+        log.info("现在时间：" + dateFormat.format(new Date()));
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-1/src/main/resources/application.properties b/2.x/chapter7-1/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/2.x/chapter7-2/pom.xml b/2.x/chapter7-2/pom.xml
new file mode 100755
index 00000000..e1987da5
--- /dev/null
+++ b/2.x/chapter7-2/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-2</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>使用Elastic Job实现定时任务</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.shardingsphere.elasticjob</groupId>
+            <artifactId>elasticjob-lite-spring-boot-starter</artifactId>
+            <version>3.0.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-2/src/main/java/com/didispace/chapter72/Chapter72Application.java b/2.x/chapter7-2/src/main/java/com/didispace/chapter72/Chapter72Application.java
new file mode 100755
index 00000000..236357d8
--- /dev/null
+++ b/2.x/chapter7-2/src/main/java/com/didispace/chapter72/Chapter72Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter72;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter72Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter72Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-2/src/main/java/com/didispace/chapter72/MySimpleJob.java b/2.x/chapter7-2/src/main/java/com/didispace/chapter72/MySimpleJob.java
new file mode 100644
index 00000000..242a8168
--- /dev/null
+++ b/2.x/chapter7-2/src/main/java/com/didispace/chapter72/MySimpleJob.java
@@ -0,0 +1,17 @@
+package com.didispace.chapter72;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.shardingsphere.elasticjob.api.ShardingContext;
+import org.apache.shardingsphere.elasticjob.simple.job.SimpleJob;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+public class MySimpleJob implements SimpleJob {
+
+    @Override
+    public void execute(ShardingContext context) {
+        log.info("MySimpleJob start : didispace.com {}", System.currentTimeMillis());
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-2/src/main/resources/application.properties b/2.x/chapter7-2/src/main/resources/application.properties
new file mode 100644
index 00000000..38bca408
--- /dev/null
+++ b/2.x/chapter7-2/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+
+elasticjob.reg-center.server-lists=localhost:2181
+elasticjob.reg-center.namespace=didispace
+
+elasticjob.jobs.my-simple-job.elastic-job-class=com.didispace.chapter72.MySimpleJob
+elasticjob.jobs.my-simple-job.cron=0/5 * * * * ?
+elasticjob.jobs.my-simple-job.sharding-total-count=1
diff --git a/2.x/chapter7-3/pom.xml b/2.x/chapter7-3/pom.xml
new file mode 100755
index 00000000..55d4ff9f
--- /dev/null
+++ b/2.x/chapter7-3/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-3</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>使用Elastic Job的分片配置</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.shardingsphere.elasticjob</groupId>
+            <artifactId>elasticjob-lite-spring-boot-starter</artifactId>
+            <version>3.0.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-3/src/main/java/com/didispace/chapter73/Chapter73Application.java b/2.x/chapter7-3/src/main/java/com/didispace/chapter73/Chapter73Application.java
new file mode 100755
index 00000000..5c62c3e6
--- /dev/null
+++ b/2.x/chapter7-3/src/main/java/com/didispace/chapter73/Chapter73Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter73;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter73Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter73Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-3/src/main/java/com/didispace/chapter73/MyShardingJob.java b/2.x/chapter7-3/src/main/java/com/didispace/chapter73/MyShardingJob.java
new file mode 100644
index 00000000..d1f535ae
--- /dev/null
+++ b/2.x/chapter7-3/src/main/java/com/didispace/chapter73/MyShardingJob.java
@@ -0,0 +1,28 @@
+package com.didispace.chapter73;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.shardingsphere.elasticjob.api.ShardingContext;
+import org.apache.shardingsphere.elasticjob.simple.job.SimpleJob;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+public class MyShardingJob implements SimpleJob {
+
+    @Override
+    public void execute(ShardingContext context) {
+        // sharding-total-count=3，所以任务被分为三个分片
+        switch (context.getShardingItem()) {
+            case 0:
+                log.info("分片1：执行任务");
+                break;
+            case 1:
+                log.info("分片2：执行任务");
+                break;
+            case 2:
+                log.info("分片3：执行任务");
+                break;
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-3/src/main/resources/application.properties b/2.x/chapter7-3/src/main/resources/application.properties
new file mode 100644
index 00000000..cb7d3cd8
--- /dev/null
+++ b/2.x/chapter7-3/src/main/resources/application.properties
@@ -0,0 +1,6 @@
+elasticjob.reg-center.server-lists=localhost:2181
+elasticjob.reg-center.namespace=didispace
+
+elasticjob.jobs.my-sharding-job.elastic-job-class=com.didispace.chapter73.MyShardingJob
+elasticjob.jobs.my-sharding-job.cron=0/5 * * * * ?
+elasticjob.jobs.my-sharding-job.sharding-total-count=3
diff --git a/2.x/chapter7-4/pom.xml b/2.x/chapter7-4/pom.xml
new file mode 100755
index 00000000..5bab3842
--- /dev/null
+++ b/2.x/chapter7-4/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-4</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>Elastic Job的错误处理策略</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.shardingsphere.elasticjob</groupId>
+            <artifactId>elasticjob-lite-spring-boot-starter</artifactId>
+            <version>3.0.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-4/src/main/java/com/didispace/chapter74/Chapter74Application.java b/2.x/chapter7-4/src/main/java/com/didispace/chapter74/Chapter74Application.java
new file mode 100644
index 00000000..e2674e95
--- /dev/null
+++ b/2.x/chapter7-4/src/main/java/com/didispace/chapter74/Chapter74Application.java
@@ -0,0 +1,13 @@
+package com.didispace.chapter74;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Chapter74Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter74Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-4/src/main/java/com/didispace/chapter74/MySimpleJob.java b/2.x/chapter7-4/src/main/java/com/didispace/chapter74/MySimpleJob.java
new file mode 100644
index 00000000..4e651c3e
--- /dev/null
+++ b/2.x/chapter7-4/src/main/java/com/didispace/chapter74/MySimpleJob.java
@@ -0,0 +1,17 @@
+package com.didispace.chapter74;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.shardingsphere.elasticjob.api.ShardingContext;
+import org.apache.shardingsphere.elasticjob.simple.job.SimpleJob;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+public class MySimpleJob implements SimpleJob {
+
+    @Override
+    public void execute(ShardingContext context) {
+        log.info("MySimpleJob start : didispace.com {}", System.currentTimeMillis());
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-4/src/main/resources/application.properties b/2.x/chapter7-4/src/main/resources/application.properties
new file mode 100644
index 00000000..16a59e0f
--- /dev/null
+++ b/2.x/chapter7-4/src/main/resources/application.properties
@@ -0,0 +1,8 @@
+spring.application.name=chapter74
+
+elasticjob.reg-center.server-lists=localhost:2181
+elasticjob.reg-center.namespace=${spring.application.name}
+
+elasticjob.jobs.my-simple-job.elastic-job-class=com.didispace.chapter74.MySimpleJob
+elasticjob.jobs.my-simple-job.cron=0/5 * * * * ?
+elasticjob.jobs.my-simple-job.sharding-total-count=1
diff --git a/2.x/chapter7-5/pom.xml b/2.x/chapter7-5/pom.xml
new file mode 100755
index 00000000..4ff53d56
--- /dev/null
+++ b/2.x/chapter7-5/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-5</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>使用@Async实现异步任务</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-5/src/main/java/com/didispace/chapter75/AsyncTasks.java b/2.x/chapter7-5/src/main/java/com/didispace/chapter75/AsyncTasks.java
new file mode 100644
index 00000000..e2f1be13
--- /dev/null
+++ b/2.x/chapter7-5/src/main/java/com/didispace/chapter75/AsyncTasks.java
@@ -0,0 +1,46 @@
+package com.didispace.chapter75;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+
+@Slf4j
+@Component
+public class AsyncTasks {
+
+    public static Random random = new Random();
+
+    @Async
+    public CompletableFuture<String> doTaskOne() throws Exception {
+        log.info("开始做任务一");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务一，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务一完成");
+    }
+
+    @Async
+    public CompletableFuture<String> doTaskTwo() throws Exception {
+        log.info("开始做任务二");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务二，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务二完成");
+    }
+
+    @Async
+    public CompletableFuture<String>  doTaskThree() throws Exception {
+        log.info("开始做任务三");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务三，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务三完成");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-5/src/main/java/com/didispace/chapter75/Chapter75Application.java b/2.x/chapter7-5/src/main/java/com/didispace/chapter75/Chapter75Application.java
new file mode 100644
index 00000000..e8aef549
--- /dev/null
+++ b/2.x/chapter7-5/src/main/java/com/didispace/chapter75/Chapter75Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter75;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@EnableAsync
+@SpringBootApplication
+public class Chapter75Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter75Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-5/src/main/resources/application.properties b/2.x/chapter7-5/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/2.x/chapter7-5/src/test/java/com/didispace/chapter75/Chapter75ApplicationTests.java b/2.x/chapter7-5/src/test/java/com/didispace/chapter75/Chapter75ApplicationTests.java
new file mode 100644
index 00000000..af32b972
--- /dev/null
+++ b/2.x/chapter7-5/src/test/java/com/didispace/chapter75/Chapter75ApplicationTests.java
@@ -0,0 +1,33 @@
+package com.didispace.chapter75;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+
+@Slf4j
+@SpringBootTest
+public class Chapter75ApplicationTests {
+
+    @Autowired
+    private AsyncTasks asyncTasks;
+
+    @Test
+    public void test() throws Exception {
+        long start = System.currentTimeMillis();
+
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne();
+        CompletableFuture<String> task2 = asyncTasks.doTaskTwo();
+        CompletableFuture<String> task3 = asyncTasks.doTaskThree();
+
+        CompletableFuture.allOf(task1, task2, task3).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/2.x/chapter7-6/pom.xml b/2.x/chapter7-6/pom.xml
new file mode 100755
index 00000000..c67956f5
--- /dev/null
+++ b/2.x/chapter7-6/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-6</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>@Async异步任务的线程池配置</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-6/src/main/java/com/didispace/chapter76/AsyncTasks.java b/2.x/chapter7-6/src/main/java/com/didispace/chapter76/AsyncTasks.java
new file mode 100644
index 00000000..66a01d8e
--- /dev/null
+++ b/2.x/chapter7-6/src/main/java/com/didispace/chapter76/AsyncTasks.java
@@ -0,0 +1,47 @@
+package com.didispace.chapter76;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+
+@Slf4j
+@Component
+public class AsyncTasks {
+
+    public static Random random = new Random();
+
+    @Async
+    public CompletableFuture<String> doTaskOne() throws Exception {
+        log.info("开始做任务一");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务一，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务一完成");
+    }
+
+    @Async
+    public CompletableFuture<String> doTaskTwo() throws Exception {
+        log.info("开始做任务二");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务二，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务二完成");
+    }
+
+    @Async
+    public CompletableFuture<String>  doTaskThree() throws Exception {
+        log.info("开始做任务三");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务三，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务三完成");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-6/src/main/java/com/didispace/chapter76/Chapter76Application.java b/2.x/chapter7-6/src/main/java/com/didispace/chapter76/Chapter76Application.java
new file mode 100644
index 00000000..4f856eba
--- /dev/null
+++ b/2.x/chapter7-6/src/main/java/com/didispace/chapter76/Chapter76Application.java
@@ -0,0 +1,15 @@
+package com.didispace.chapter76;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@EnableAsync
+@SpringBootApplication
+public class Chapter76Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter76Application.class, args);
+    }
+
+}
diff --git a/2.x/chapter7-6/src/main/resources/application.properties b/2.x/chapter7-6/src/main/resources/application.properties
new file mode 100644
index 00000000..070a4b71
--- /dev/null
+++ b/2.x/chapter7-6/src/main/resources/application.properties
@@ -0,0 +1,9 @@
+spring.task.execution.pool.core-size=2
+spring.task.execution.pool.max-size=5
+spring.task.execution.pool.queue-capacity=10
+spring.task.execution.pool.keep-alive=60s
+spring.task.execution.pool.allow-core-thread-timeout=true
+spring.task.execution.thread-name-prefix=task-
+
+spring.task.execution.shutdown.await-termination=false
+spring.task.execution.shutdown.await-termination-period=30s
\ No newline at end of file
diff --git a/2.x/chapter7-6/src/test/java/com/didispace/chapter76/Chapter76ApplicationTests.java b/2.x/chapter7-6/src/test/java/com/didispace/chapter76/Chapter76ApplicationTests.java
new file mode 100644
index 00000000..2a832502
--- /dev/null
+++ b/2.x/chapter7-6/src/test/java/com/didispace/chapter76/Chapter76ApplicationTests.java
@@ -0,0 +1,32 @@
+package com.didispace.chapter76;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.concurrent.CompletableFuture;
+
+@Slf4j
+@SpringBootTest
+public class Chapter76ApplicationTests {
+
+    @Autowired
+    private AsyncTasks asyncTasks;
+
+    @Test
+    public void test1() throws Exception {
+        long start = System.currentTimeMillis();
+
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne();
+        CompletableFuture<String> task2 = asyncTasks.doTaskTwo();
+        CompletableFuture<String> task3 = asyncTasks.doTaskThree();
+
+        CompletableFuture.allOf(task1, task2, task3).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/2.x/chapter7-7/pom.xml b/2.x/chapter7-7/pom.xml
new file mode 100755
index 00000000..2a69afe0
--- /dev/null
+++ b/2.x/chapter7-7/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-7</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>如何隔离@Async异步任务的线程池</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-7/src/main/java/com/didispace/chapter77/AsyncTasks.java b/2.x/chapter7-7/src/main/java/com/didispace/chapter77/AsyncTasks.java
new file mode 100644
index 00000000..90185dc8
--- /dev/null
+++ b/2.x/chapter7-7/src/main/java/com/didispace/chapter77/AsyncTasks.java
@@ -0,0 +1,36 @@
+package com.didispace.chapter77;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+
+@Slf4j
+@Component
+public class AsyncTasks {
+
+    public static Random random = new Random();
+
+    @Async("taskExecutor1")
+    public CompletableFuture<String> doTaskOne(String taskNo) throws Exception {
+        log.info("开始任务：{}", taskNo);
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务：{}，耗时：{} 毫秒", taskNo, end - start);
+        return CompletableFuture.completedFuture("任务完成");
+    }
+
+    @Async("taskExecutor2")
+    public CompletableFuture<String> doTaskTwo(String taskNo) throws Exception {
+        log.info("开始任务：{}", taskNo);
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务：{}，耗时：{} 毫秒", taskNo, end - start);
+        return CompletableFuture.completedFuture("任务完成");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-7/src/main/java/com/didispace/chapter77/Chapter77Application.java b/2.x/chapter7-7/src/main/java/com/didispace/chapter77/Chapter77Application.java
new file mode 100644
index 00000000..e598f26d
--- /dev/null
+++ b/2.x/chapter7-7/src/main/java/com/didispace/chapter77/Chapter77Application.java
@@ -0,0 +1,55 @@
+package com.didispace.chapter77;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+@EnableAsync
+@SpringBootApplication
+public class Chapter77Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter77Application.class, args);
+    }
+
+    @EnableAsync
+    @Configuration
+    class TaskPoolConfig {
+
+        @Bean
+        public Executor taskExecutor1() {
+            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+            executor.setCorePoolSize(2);
+            executor.setMaxPoolSize(2);
+            executor.setQueueCapacity(10);
+            executor.setKeepAliveSeconds(60);
+            executor.setThreadNamePrefix("executor-1-");
+            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+            return executor;
+        }
+
+        @Bean
+        public Executor taskExecutor2() {
+            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+            executor.setCorePoolSize(2);
+            executor.setMaxPoolSize(2);
+            executor.setQueueCapacity(10);
+            executor.setKeepAliveSeconds(60);
+            executor.setThreadNamePrefix("executor-2-");
+            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+            return executor;
+        }
+
+    }
+
+}
diff --git a/2.x/chapter7-7/src/main/resources/application.properties b/2.x/chapter7-7/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/2.x/chapter7-7/src/test/java/com/didispace/chapter77/Chapter77ApplicationTests.java b/2.x/chapter7-7/src/test/java/com/didispace/chapter77/Chapter77ApplicationTests.java
new file mode 100644
index 00000000..d6479787
--- /dev/null
+++ b/2.x/chapter7-7/src/test/java/com/didispace/chapter77/Chapter77ApplicationTests.java
@@ -0,0 +1,40 @@
+package com.didispace.chapter77;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+
+@Slf4j
+@SpringBootTest
+public class Chapter77ApplicationTests {
+
+    @Autowired
+    private AsyncTasks asyncTasks;
+
+    @Test
+    public void test() throws Exception {
+        long start = System.currentTimeMillis();
+
+        // 线程池1
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne("1");
+        CompletableFuture<String> task2 = asyncTasks.doTaskOne("2");
+        CompletableFuture<String> task3 = asyncTasks.doTaskOne("3");
+
+        // 线程池2
+        CompletableFuture<String> task4 = asyncTasks.doTaskTwo("4");
+        CompletableFuture<String> task5 = asyncTasks.doTaskTwo("5");
+        CompletableFuture<String> task6 = asyncTasks.doTaskTwo("6");
+
+        // 一起执行
+        CompletableFuture.allOf(task1, task2, task3, task4, task5, task6).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/2.x/chapter7-8/pom.xml b/2.x/chapter7-8/pom.xml
new file mode 100755
index 00000000..40158a94
--- /dev/null
+++ b/2.x/chapter7-8/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-8</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>为@Async异步任务线程池配置拒绝策略</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/2.x/chapter7-8/src/main/java/com/didispace/chapter78/AsyncTasks.java b/2.x/chapter7-8/src/main/java/com/didispace/chapter78/AsyncTasks.java
new file mode 100644
index 00000000..5cb782f5
--- /dev/null
+++ b/2.x/chapter7-8/src/main/java/com/didispace/chapter78/AsyncTasks.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter78;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+
+@Slf4j
+@Component
+public class AsyncTasks {
+
+    public static Random random = new Random();
+
+    @Async("taskExecutor1")
+    public CompletableFuture<String> doTaskOne(String taskNo) throws Exception {
+        log.info("开始任务：{}", taskNo);
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务：{}，耗时：{} 毫秒", taskNo, end - start);
+        return CompletableFuture.completedFuture("任务完成");
+    }
+
+}
\ No newline at end of file
diff --git a/2.x/chapter7-8/src/main/java/com/didispace/chapter78/Chapter78Application.java b/2.x/chapter7-8/src/main/java/com/didispace/chapter78/Chapter78Application.java
new file mode 100644
index 00000000..f04169be
--- /dev/null
+++ b/2.x/chapter7-8/src/main/java/com/didispace/chapter78/Chapter78Application.java
@@ -0,0 +1,60 @@
+package com.didispace.chapter78;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+
+@EnableAsync
+@SpringBootApplication
+public class Chapter78Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter78Application.class, args);
+    }
+
+    @EnableAsync
+    @Configuration
+    class TaskPoolConfig {
+
+        @Bean
+        public Executor taskExecutor1() {
+            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+            executor.setCorePoolSize(2);
+            executor.setMaxPoolSize(2);
+            executor.setQueueCapacity(2);
+            executor.setKeepAliveSeconds(60);
+            executor.setThreadNamePrefix("executor-1-");
+
+            /**配置拒绝策略**/
+
+            // AbortPolicy策略：默认策略，如果线程池队列满了丢掉这个任务并且抛出RejectedExecutionException异常。
+//            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
+
+            // DiscardPolicy策略：如果线程池队列满了，会直接丢掉这个任务并且不会有任何异常。
+//            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
+
+            // DiscardOldestPolicy策略：如果队列满了，会将最早进入队列的任务删掉腾出空间，再尝试加入队列。
+//            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardOldestPolicy());
+
+            // CallerRunsPolicy策略：如果添加到线程池失败，那么主线程会自己去执行该任务，不会等待线程池中的线程去执行。
+//            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+
+            // 自定义策略
+//            executor.setRejectedExecutionHandler(new RejectedExecutionHandler() {
+//                @Override
+//                public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
+//
+//                }
+//            });
+
+            return executor;
+        }
+
+    }
+
+}
diff --git a/2.x/chapter7-8/src/main/resources/application.properties b/2.x/chapter7-8/src/main/resources/application.properties
new file mode 100644
index 00000000..e69de29b
diff --git a/2.x/chapter7-8/src/test/java/com/didispace/chapter78/Chapter78ApplicationTests.java b/2.x/chapter7-8/src/test/java/com/didispace/chapter78/Chapter78ApplicationTests.java
new file mode 100644
index 00000000..6b9a3919
--- /dev/null
+++ b/2.x/chapter7-8/src/test/java/com/didispace/chapter78/Chapter78ApplicationTests.java
@@ -0,0 +1,61 @@
+package com.didispace.chapter78;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+
+@Slf4j
+@SpringBootTest
+public class Chapter78ApplicationTests {
+
+    @Autowired
+    private AsyncTasks asyncTasks;
+
+    @Test
+    public void test() throws Exception {
+        // 线程池配置：core-2,max-2,queue=2，可以容纳4个任务提交
+
+        long start = System.currentTimeMillis();
+
+        // 线程池1
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne("1");
+        CompletableFuture<String> task2 = asyncTasks.doTaskOne("2");
+        CompletableFuture<String> task3 = asyncTasks.doTaskOne("3");
+        CompletableFuture<String> task4 = asyncTasks.doTaskOne("4");
+
+        // 一起执行
+        CompletableFuture.allOf(task1, task2, task3, task4).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+    @Test
+    public void test2() throws Exception {
+        // 线程池配置：core-2,max-2,queue=2，同时有5个任务，出现下面异常：
+        // org.springframework.core.task.TaskRejectedException: Executor [java.util.concurrent.ThreadPoolExecutor@59901c4d[Running, pool size = 2,
+        // active threads = 0, queued tasks = 2, completed tasks = 4]] did not accept task: java.util.concurrent.CompletableFuture$AsyncSupply@408e96d9
+
+        long start = System.currentTimeMillis();
+
+        // 线程池1
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne("1");
+        CompletableFuture<String> task2 = asyncTasks.doTaskOne("2");
+        CompletableFuture<String> task3 = asyncTasks.doTaskOne("3");
+        CompletableFuture<String> task4 = asyncTasks.doTaskOne("4");
+        CompletableFuture<String> task5 = asyncTasks.doTaskOne("5");
+
+        // 一起执行
+        CompletableFuture.allOf(task1, task2, task3, task4, task5).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+}
diff --git a/2.x/chapter8-1/pom.xml b/2.x/chapter8-1/pom.xml
new file mode 100644
index 00000000..d60616ec
--- /dev/null
+++ b/2.x/chapter8-1/pom.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter8-1</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>默认日志管理与Logback配置详解</description>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<fork>true</fork>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter8-1/src/main/java/com/didispace/chapter81/Chapter81Application.java b/2.x/chapter8-1/src/main/java/com/didispace/chapter81/Chapter81Application.java
new file mode 100644
index 00000000..a8fec0e0
--- /dev/null
+++ b/2.x/chapter8-1/src/main/java/com/didispace/chapter81/Chapter81Application.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter81;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog https://blog.didispace.com
+ */
+@Slf4j
+@SpringBootApplication
+public class Chapter81Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter81Application.class, args);
+
+        log.error("Hello World");
+        log.warn("Hello World");
+        log.info("Hello World");
+        log.debug("Hello World");
+        log.trace("Hello World");
+    }
+
+}
diff --git a/2.x/chapter8-1/src/main/resources/application.properties b/2.x/chapter8-1/src/main/resources/application.properties
new file mode 100644
index 00000000..361847c5
--- /dev/null
+++ b/2.x/chapter8-1/src/main/resources/application.properties
@@ -0,0 +1,14 @@
+debug=true
+
+spring.output.ansi.enabled=detect
+
+logging.file.name=run.log
+logging.file.path=./
+
+logging.level.com.didispace=debug
+
+logging.logback.rollingpolicy.clean-history-on-start=false
+logging.logback.rollingpolicy.file-name-pattern=
+logging.logback.rollingpolicy.max-history=7
+logging.logback.rollingpolicy.max-file-size=10MB
+logging.logback.rollingpolicy.total-size-cap=0B
diff --git a/2.x/chapter8-2/pom.xml b/2.x/chapter8-2/pom.xml
new file mode 100644
index 00000000..eeda9143
--- /dev/null
+++ b/2.x/chapter8-2/pom.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.6.1</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>chapter8-2</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<description>使用log4j2记录日志</description>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-starter-logging</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-log4j2</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<scope>provided</scope>
+		</dependency>
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<fork>true</fork>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter8-2/src/main/java/com/didispace/chapter82/Chapter82Application.java b/2.x/chapter8-2/src/main/java/com/didispace/chapter82/Chapter82Application.java
new file mode 100644
index 00000000..be62c0c2
--- /dev/null
+++ b/2.x/chapter8-2/src/main/java/com/didispace/chapter82/Chapter82Application.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter82;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog https://blog.didispace.com
+ */
+@Slf4j
+@SpringBootApplication
+public class Chapter82Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter82Application.class, args);
+
+        log.error("Hello World");
+        log.warn("Hello World");
+        log.info("Hello World");
+        log.debug("Hello World");
+        log.trace("Hello World");
+    }
+
+}
diff --git a/2.x/chapter8-2/src/main/resources/application.properties b/2.x/chapter8-2/src/main/resources/application.properties
new file mode 100644
index 00000000..b642e6f9
--- /dev/null
+++ b/2.x/chapter8-2/src/main/resources/application.properties
@@ -0,0 +1,2 @@
+
+logging.config=classpath:log4j2.xml
\ No newline at end of file
diff --git a/2.x/chapter8-2/src/main/resources/log4j2.xml b/2.x/chapter8-2/src/main/resources/log4j2.xml
new file mode 100644
index 00000000..18ca1279
--- /dev/null
+++ b/2.x/chapter8-2/src/main/resources/log4j2.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="INFO">
+            <AppenderRef ref="Console"/>
+        </Root>
+    </Loggers>
+</Configuration>
diff --git a/2.x/chapter8-3/pom.xml b/2.x/chapter8-3/pom.xml
new file mode 100644
index 00000000..d6a578e8
--- /dev/null
+++ b/2.x/chapter8-3/pom.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.6.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter8-3</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>使用tinylog记录日志</description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+        <tinylog.version>2.4.1</tinylog.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.springframework.boot</groupId>
+                    <artifactId>spring-boot-starter-logging</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>org.tinylog</groupId>
+            <artifactId>tinylog-api</artifactId>
+            <version>${tinylog.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.tinylog</groupId>
+            <artifactId>tinylog-impl</artifactId>
+            <version>${tinylog.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.tinylog</groupId>
+            <artifactId>slf4j-tinylog</artifactId>
+            <version>${tinylog.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.tinylog</groupId>
+            <artifactId>jcl-tinylog</artifactId>
+            <version>${tinylog.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.tinylog</groupId>
+            <artifactId>log4j1.2-api</artifactId>
+            <version>${tinylog.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <fork>true</fork>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file
diff --git a/2.x/chapter8-3/src/main/java/com/didispace/chapter83/Chapter83Application.java b/2.x/chapter8-3/src/main/java/com/didispace/chapter83/Chapter83Application.java
new file mode 100644
index 00000000..8a68d462
--- /dev/null
+++ b/2.x/chapter8-3/src/main/java/com/didispace/chapter83/Chapter83Application.java
@@ -0,0 +1,26 @@
+package com.didispace.chapter83;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog https://blog.didispace.com
+ */
+@Slf4j
+@SpringBootApplication
+public class Chapter83Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter83Application.class, args);
+
+        log.error("Hello World");
+        log.warn("Hello World");
+        log.info("Hello World");
+        log.debug("Hello World");
+        log.trace("Hello World");
+    }
+
+}
diff --git a/2.x/chapter8-3/src/main/resources/application.properties b/2.x/chapter8-3/src/main/resources/application.properties
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/2.x/chapter8-3/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/2.x/chapter8-3/src/main/resources/tinylog.properties b/2.x/chapter8-3/src/main/resources/tinylog.properties
new file mode 100644
index 00000000..9eb1b999
--- /dev/null
+++ b/2.x/chapter8-3/src/main/resources/tinylog.properties
@@ -0,0 +1,2 @@
+writer=console
+writer.format={date: HH:mm:ss.SSS} {level}: {message}
\ No newline at end of file
diff --git a/2.x/pom.xml b/2.x/pom.xml
new file mode 100644
index 00000000..f20e1714
--- /dev/null
+++ b/2.x/pom.xml
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>2.x</artifactId>
+    <version>2.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+    <description>全网Star最多的Spring Boot基础教程</description>
+
+    <modules>
+        <!--快速入门-->
+        <module>chapter1-1</module>
+
+        <!--配置文件-->
+        <module>chapter1-2</module>  <!-- 2.4版本前后的多环境配置与配置激活 -->
+        <module>chapter1-3</module>  <!-- 2.4版本前后的配置分组配置 -->
+        <module>chapter1-4</module>  <!-- 配置元数据的应用 -->
+        <module>chapter1-5</module>  <!-- 加密配置文件中的敏感信息 -->
+
+        <!--API开发-->
+        <module>chapter2-1</module>  <!-- 构建RESTful API与单元测试 -->
+        <module>chapter2-2</module>  <!-- 使用Swagger2构建强大的API文档 -->
+        <module>chapter2-3</module>  <!-- JSR-303实现请求参数校验 -->
+        <module>chapter2-4</module>  <!-- Swagger接口分类与各元素排序问题详解 -->
+        <module>chapter2-5</module>  <!-- Swagger静态文档的生成 -->
+        <module>chapter2-6</module>  <!-- 找回启动日志中的请求路径列表 -->
+        <module>chapter2-7</module>  <!-- 使用SpringFox3生成Swagger文档 -->
+        <module>chapter2-8</module>  <!-- 如何扩展XML格式的请求和响应 -->
+<!--        <module>chapter2-9</module>  &lt;!&ndash; 使用spring-graphql构建API &ndash;&gt;-->
+        <!-- 2-x 使用Webflux编写API接口 -->
+
+        <!--数据访问（关系型数据库）-->
+        <module>chapter3-1</module>  <!-- 使用JdbcTemplate访问MySQL数据库 -->
+        <module>chapter3-2</module>  <!-- 默认数据源Hikari的配置详解 -->
+        <module>chapter3-3</module>  <!-- 使用国产数据库连接池Druid -->
+        <module>chapter3-4</module>  <!-- 使用Spring Data JPA访问MySQL -->
+        <module>chapter3-5</module>  <!-- 使用MyBatis访问MySQL -->
+        <module>chapter3-6</module>  <!-- 使用MyBatis（xml配置方式）-->
+        <module>chapter3-7</module>  <!-- JdbcTemplate的多数据源配置 -->
+        <module>chapter3-8</module>  <!-- Spring Data JPA的多数据源配置 -->
+        <module>chapter3-9</module>  <!-- MyBatis的多数据源配置 -->
+        <module>chapter3-10</module> <!-- 事务管理入门 -->
+        <module>chapter3-11</module> <!-- 使用Flyway管理数据库版本 -->
+        <module>chapter3-12</module> <!-- 使用JTA实现多数据源的事务 -->
+        <module>chapter3-13</module>  <!--2.5版本之后的数据脚本初始化 -->
+
+        <!-- 3-12 使用Liquibase管理数据库版本 -->
+        <!-- 3-13 分布式事务 -->
+
+        <!-- Web开发 -->
+        <module>chapter4-1</module>  <!-- 使用 Thymeleaf开发Web页面 -->
+        <module>chapter4-2</module>  <!-- 使用 ECharts 绘制折线图 -->
+        <module>chapter4-3</module>  <!-- 文件上传 -->
+        <module>chapter4-4</module>  <!-- 多文件上传 -->
+        <module>chapter4-5</module>  <!-- 整合Spring Security -->
+
+        <!-- 各种缓存 -->
+        <module>chapter5-1</module>  <!-- 使用进程内缓存 -->
+        <module>chapter5-2</module>  <!-- 使用进程内缓存 EhCache -->
+        <module>chapter5-3</module>  <!-- 使用EhCache缓存集群 -->
+        <module>chapter5-4</module>  <!-- 使用集中式缓存Redis -->
+        <module>chapter5-5</module>  <!-- 使用Redis的发布订阅-->
+<!--        <module>chapter5-6</module>  &lt;!&ndash; 5-6 Redis + EhCache的二连组合拳 &ndash;&gt;-->
+
+        <!-- 其他常见数据储存的使用 -->
+        <module>chapter6-1</module>  <!-- 6-1 使用MongoDB -->
+        <module>chapter6-2</module>  <!-- 6-2 使用轻量级树状存储 LDAP -->
+        <module>chapter6-3</module>  <!-- 6-3 使用时序数据库 InfluxDB -->
+        <module>chapter6-4</module>  <!-- 6-4 使用PostgreSQL数据库 -->
+        <!-- 6-5 使用Elasticsearch -->
+
+        <!-- 任务管理 -->
+        <module>chapter7-1</module>  <!-- 7-1 使用@Scheduled实现定时任务 -->
+        <module>chapter7-2</module>  <!-- 7-2 使用Elastic Job实现定时任务 -->
+        <module>chapter7-3</module>  <!-- 7-3 使用Elastic Job的分片配置 -->
+        <module>chapter7-4</module>  <!-- 7-4 使用Elastic Job的namespace防止任务名冲突 -->
+        <module>chapter7-5</module>  <!-- 7-5 使用@Async实现异步任务 -->
+        <module>chapter7-6</module>  <!-- 7-6 配置@Async异步任务的线程池 -->
+        <module>chapter7-7</module>  <!-- 7-7 如何隔离@Async异步任务的线程池 -->
+        <module>chapter7-8</module>  <!-- 7-8 为@Async异步任务线程池配置拒绝策略 -->
+        <!-- 7-9 为@Async异步任务添加超时时间 -->
+
+        <!-- 日志管理 -->
+        <module>chapter8-1</module>  <!-- 8-1 默认日志管理与Logback配置详解 -->
+        <module>chapter8-2</module>  <!-- 8-2 使用log4j2记录日志 -->
+        <module>chapter8-3</module>  <!-- 8-3 使用tinylog记录日志 -->
+
+        <!-- 其他内容 -->
+        <!-- 9-1 如何生成二维码 -->
+
+    </modules>
+</project>
diff --git a/README.md b/README.md
index cd98d57f..916c7fa4 100644
--- a/README.md
+++ b/README.md
@@ -1,112 +1,37 @@
 # Spring Boot基础教程
 
-本项目内容为Spring Boot教程程序样例。如您觉得该项目对您有用，欢迎点击右上方的**Star**按钮，给予支持！！
+**专题目标**：打造全网内容最全，比收费教程更好的Spring Boot免费教程！
 
-- 我的博客：http://blog.didispace.com
-- **我的小密圈（深度交流与问答）：https://t.xiaomiquan.com/zfEiY3v**
-- GitHub：https://github.com/dyc87112/SpringBoot-Learning
-- Gitee：https://gitee.com/didispace/SpringBoot-Learning
-- Spring For All社区：http://spring4all.com/
-- Spring Boot系列博文：http://blog.didispace.com/categories/Spring-Boot/
-- Spring Cloud系列博文：http://blog.didispace.com/categories/Spring-Cloud/
+**如何支持**：
 
-**声明：本人已放弃"Spring Cloud中国社区"，该社区的任何行为均与本人无关。[Spring For All社区](http://spring4all.com/)是新组建的关于Spring的纯技术交流社区（涵盖Spring Boot、Spring Cloud等内容），集诸多开源爱好者和技术大牛贡献内容和交流问题。我们不夸大、不装逼、做最纯粹的技术分享！！！**
+1. 关注我的公众号”**程序猿DD**“
+2. 点个`Star`并`Follow`我
+3. 把该仓库分享给更多的朋友
 
-## 样例列表
+**加入社群**：如果你正在学习Spring Boot，不妨加入我们的[Spring技术交流群](https://blog.didispace.com/join-group-spring/index.html) ，一起成长
 
-#### 快速入门
+**Spring社区**：如果您在学习过程中碰到问题，可以访问[SpringForAll社区](http://spring4all.com)，描述你的问题，我们会尽快给你答复。当然，如果你想分享你的学习经验，也可以在这里发表你的文章
 
-- chapter1：[基本项目构建（可作为工程脚手架），引入web模块，完成一个简单的RESTful API](http://blog.didispace.com/spring-boot-learning-1/)
-- [使用Intellij中的Spring Initializr来快速构建Spring Boot/Cloud工程](http://blog.didispace.com/spring-initializr-in-intellij/)
+## 教程目录
 
-#### 工程配置
+该教程自2016年连载至今，因内容较多，经历过多个版本的迭代。
 
-- chapter2-1-1：[配置文件详解：自定义属性、随机数、多环境配置等](http://blog.didispace.com/springbootproperties/)
+为方便查看学习，这里重新做了整理，根据1.x版本和2.x版本做了区分汇总，后续还会继续跟进3.x版本！
 
-#### Web开发
+可以通过下面的链接，进入具体版本的教程目录：
 
-- chapter3-1-1：[构建一个较为复杂的RESTful API以及单元测试](http://blog.didispace.com/springbootrestfulapi/)
-- chapter3-1-2：[使用Thymeleaf模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
-- chapter3-1-3：[使用Freemarker模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
-- chapter3-1-4：[使用Velocity模板引擎渲染web视图](http://blog.didispace.com/springbootweb/)
-- chapter3-1-5：[使用Swagger2构建RESTful API](http://blog.didispace.com/springbootswagger2/)
-- chapter3-1-6：[统一异常处理](http://blog.didispace.com/springbootexception/)
+- [Spring Boot 2.x](./2.x)
+- [Spring Boot 1.x](./1.x)
 
-#### 数据访问
+> **关注公众号：“程序猿DD”**，领取我整理的免费学习资料。<br>
 
-- chapter3-2-1：[使用JdbcTemplate](http://blog.didispace.com/springbootdata1/)
-- chapter3-2-2：[使用Spring-data-jpa简化数据访问层（推荐）](http://blog.didispace.com/springbootdata2/)
-- chapter3-2-3：[多数据源配置（一）：JdbcTemplate](http://blog.didispace.com/springbootmultidatasource/)
-- chapter3-2-4：[多数据源配置（二）：Spring-data-jpa](http://blog.didispace.com/springbootmultidatasource/)
-- chapter3-2-5：[使用NoSQL数据库（一）：Redis](http://blog.didispace.com/springbootredis/)
-- chapter3-2-6：[使用NoSQL数据库（二）：MongoDB](http://blog.didispace.com/springbootmongodb/)
-- chapter3-2-7：[整合MyBatis](http://blog.didispace.com/springbootmybatis/)
-- chapter3-2-8：[MyBatis注解配置详解](http://blog.didispace.com/mybatisinfo/)
-- chapter3-2-9：[使用Flyway来管理数据库版本](http://blog.didispace.com/spring-boot-flyway-db-version/)
+## 推荐内容
 
-#### 事务管理
+- [我的博客](http://blog.didispace.com)：分享平时学习和实践过的技术内容
+- [Spring Boot教程](https://blog.didispace.com/spring-boot-learning-2x/)：全网Star最多的免费Spring Boot基础教程
+- [Spring Cloud教程](https://blog.didispace.com/spring-cloud-learning/)：全网最早最全的免费Spring Cloud基础教程
+- [知识星球](https://t.xiaomiquan.com/zfEiY3v)：聊聊技术人的斜杠生活
 
-- chapter3-3-1：[使用事务管理](http://blog.didispace.com/springboottransactional/)
-- chapter3-3-2：[分布式事务（未完成）]
+**关注公众号，获得更多技术资讯**
 
-#### 其他内容
-- chapter4-1-1：[使用@Scheduled创建定时任务](http://blog.didispace.com/springbootscheduled/)
-- chapter4-1-2：[使用@Async实现异步调用](http://blog.didispace.com/springbootasync/)
-
-#### 日志管理
-
-- chapter4-2-1：[默认日志的配置](http://blog.didispace.com/springbootlog/)
-- chapter4-2-2：[使用log4j记录日志](http://blog.didispace.com/springbootlog4j/)
-- chapter4-2-3：[对log4j进行多环境不同日志级别的控制](http://blog.didispace.com/springbootlog4jmuilt/)
-- chapter4-2-4：[使用AOP统一处理Web请求日志](http://blog.didispace.com/springbootaoplog/)
-- chapter4-2-5：[使用log4j记录日志到MongoDB](http://blog.didispace.com/springbootlog4jmongodb/)
-- chapter4-2-6：[Spring Boot 1.5.x新特性：动态修改日志级别](http://blog.didispace.com/spring-boot-1-5-x-feature-1/)]
-
-#### 安全管理
-
-- chapter4-3-1：[使用Spring Security](http://blog.didispace.com/springbootsecurity/)
-- chapter4-3-2：[使用Spring Session（未完成）]
-
-#### 缓存支持
-
-- chapter4-4-1：[注解配置与EhCache使用](http://blog.didispace.com/springbootcache1/)
-- chapter4-4-2：[使用Redis做集中式缓存](http://blog.didispace.com/springbootcache2/)
-
-#### 邮件发送
-
-- chapter4-5-1：[实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件](http://blog.didispace.com/springbootmailsender/)
-
-#### 消息服务
-
-- chapter5-1-1：[JMS（未完成）]
-- chapter5-2-1：[Spring Boot中使用RabbitMQ](http://blog.didispace.com/spring-boot-rabbitmq/)
-
-#### 其他功能
-
-- chapter6-1-1：[使用Spring StateMachine框架实现状态机](http://blog.didispace.com/spring-statemachine/)
-- [Spring Boot Actuator监控端点小结](http://blog.didispace.com/spring-boot-actuator-1/)
-- [在传统Spring应用中使用spring-boot-actuator模块提供监控端点](http://blog.didispace.com/spring-boot-actuator-without-boot/)
-- [Spring Boot应用的后台运行配置](http://blog.didispace.com/spring-boot-run-backend/)
-- [Spring Boot自定义Banner](http://blog.didispace.com/spring-boot-banner/)
-
-#### Dubbo进行服务治理
-
-- chapter9-2-1：[Spring Boot中使用Dubbo进行服务治理](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-1)
-- chapter9-2-2：[Spring Boot与Dubbo中管理服务依赖](https://gitee.com/didispace/SpringBoot-Learning/tree/master/Chapter9-2-2)
-
-## 我的公众号
-
-![输入图片说明](http://git.oschina.net/uploads/images/2017/0105/082137_85109d07_437188.jpeg "在这里输入图片标题")
-
-## 推荐我的书
-
-![输入图片说明](https://git.oschina.net/uploads/images/2017/0416/233656_dd3bce94_437188.png "在这里输入图片标题")
-
-## 开源项目推荐
-
-- 我的《Spring Cloud基础教程》：https://github.com/dyc87112/SpringCloud-Learning
-- 泥瓦匠Spring Boot学习案例：https://git.oschina.net/jeff1993/springboot-learning-example
-
-## 其他推荐
-
-- Spring Boot Reference Guide：http://blog.didispace.com/books/spring-boot-reference/
\ No newline at end of file
+<img src="http://blog.didispace.com/css/images/weixin.jpg" style="width:150px;height:150px;" />
diff --git a/README_zh.md b/README_zh.md
new file mode 100644
index 00000000..f75927c3
--- /dev/null
+++ b/README_zh.md
@@ -0,0 +1,37 @@
+# Spring Boot基础教程
+
+**专题目标**：打造全网内容最全，比收费教程更好的Spring Boot免费教程！
+
+**如何支持**：
+
+1. 关注我的公众号”**程序猿DD**“
+2. 点个`Star`并`Follow`我
+3. 把该仓库分享给更多的朋友
+
+**加入社群**：如果你正在学习Spring Boot，不妨加入我们的[Spring技术交流群](https://blog.didispace.com/join-group-spring/index.html) ，一起成长
+
+**Spring社区**：如果您在学习过程中碰到问题，可以访问[SpringForAll社区](http://spring4all.com)，描述你的问题，我们会尽快给你答复。当然，如果你想分享你的学习经验，也可以在这里发表你的文章
+
+## 教程目录
+
+该教程自2016年连载至今，因内容较多，经历过多个版本的迭代。
+
+为方便查看学习，这里重新做了整理，根据1.x版本和2.x版本做了区分汇总。
+
+可以通过下面的链接，进入具体版本的教程目录：
+
+- [Spring Boot 2.x](./2.x)
+- [Spring Boot 1.x](./1.x)
+
+> **关注公众号：“程序猿DD”**，领取我整理的免费学习资料。<br>
+
+## 推荐内容
+
+- [我的博客](http://blog.didispace.com)：分享平时学习和实践过的技术内容
+- [Spring Boot教程](https://blog.didispace.com/spring-boot-learning-2x/)：全网Star最多的免费Spring Boot基础教程
+- [Spring Cloud教程](https://blog.didispace.com/spring-cloud-learning/)：全网最早最全的免费Spring Cloud基础教程
+- [知识星球](https://t.xiaomiquan.com/zfEiY3v)：聊聊技术人的斜杠生活
+
+**关注公众号，获得更多技术资讯**
+
+<img src="http://blog.didispace.com/css/images/weixin.jpg" style="width:150px;height:150px;" />
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diff --git a/pom.xml b/pom.xml
new file mode 100644
index 00000000..469fe5a3
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>SpringBoot-Learning</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <modules>
+        <!-- 默认使用2.x教程下的工程，如果要用1.x的可修改下面的module -->
+        <module>2.x</module>
+    </modules>
+
+</project>
