Spring Boot 2.x基础教程：使用PostgreSQL

Author: dyc87112

2.x/README.md

@@ -72,6 +72,7 @@
 - [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
 

2.x/README_zh.md

@@ -73,7 +73,7 @@
 - [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
 

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>

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);
+    }
+
+}

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;
+    }
+}

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);
+
+}

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

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());
+
+    }
+
+}

2.x/pom.xml

@@ -64,11 +64,12 @@
         <module>chapter5-5</module>  <!-- 使用Redis的发布订阅-->
         <!-- 5-6 Redis + EhCache的二连组合拳 -->
 
-        <!-- 非关系型的数据储存的使用 -->
+        <!-- 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 -->
-        <!-- 6-4 使用Elasticsearch -->
+        <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 -->