1、创建Spring boot项目
2、保存等待构建完成
3、增加spring-boot-starter-data-jpa、内存数据库依赖包hsqldb
<!-- 添加data jpa依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</scope>
</dependency>
pom.xml
<?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.kevin</groupId>
<artifactId>boot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>boot</name>
<description>Demo project for Spring Boot</description>
<!--
spring-boot-starter-parent项目中继承以获得合理的默认值。父项目提供以下功能:
Java 1.8作为默认的编译器级别。
UTF-8源码编码。
一个依赖管理部分,从春天启动依赖性继承POM,管理公共依赖的版本。这种依赖关系管理可以让您在自己的pom中使用这些依赖关系时忽略<version>标记。
明智的 资源过滤。
明智的插件配置(exec插件, Git提交ID和 阴影)。
明智的资源过滤application.properties和application.yml 包括配置文件特定的文件(例如application-dev.properties和 application-dev.yml)-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 添加data jpa依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</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>
4、项目结构图
5、相关文件
applicationContext.properties
ddl-auto:create----每次运行该程序,没有表格会新建表格,表内有数据会清空
ddl-auto:create-drop----每次程序结束的时候会清空表
ddl-auto:update----每次运行程序,没有表格会新建表格,表内有数据不会清空,只会更新
ddl-auto:validate----运行程序会校验数据与数据库的字段类型是否相同,不同会报错
spring.jpa.hibernate.ddl-auto = create-drop
实体类User.java
package com.kevin.boot.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import java.io.Serializable;
/**
* @author pingan.yang
* @program SpringBootJpa
* @description
* @create 2018-05-29 19:10
*/
@Entity
public class User implements Serializable {
@Id
@GeneratedValue
private int id;
@Column(nullable = false)
private String name;
@Column(nullable = false)
private int age;
public User() {
}
public User (String name, int age) {
this.name = name;
this.age = age;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
数据库底层操作类UserRepository.java
package com.kevin.boot.repository;
import com.kevin.boot.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.List;
public interface UserRepository extends JpaRepository<User, Long> {
User getUserById(int id);
List<User> getUserByName(String name);
}
User业务中心控制类
package com.kevin.boot.controller;
import com.kevin.boot.model.User;
import com.kevin.boot.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* @author kevin.yang
* @program SpringBootJpa
* @description
* @create 2018-05-29 19:11
*/
// RestController = Controller + ResponseBody
@RestController
public class UserController {
@Autowired
private UserRepository userRepository;
@RequestMapping("/saveUser")
public String saveUser(@RequestParam("name") String name, @RequestParam("age") int age) {
try {
User user = new User(name, age);
userRepository.save(user);
} catch (Exception e) {
e.printStackTrace();
return "error";
}
return "save success";
}
@RequestMapping("/getUserById")
public User getUserById(@RequestParam("id") int id) {
return userRepository.getUserById(id);
}
@RequestMapping("/getAllUser")
public List<User> getAllUser() {
return userRepository.findAll();
}
}
6、运行测试
运行Spring boot启动类BootApplication.java
浏览器中输入一下测试地址
1>http://127.0.0.1:8080/saveUser?name=kevin.yang&age=1
2>http://127.0.0.1:8080/getAllUser
测试结果
1> 测试添加用户信息
2> 测试查询用户信息