1、导入相关依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.11</version><scope>runtime</scope></dependency>

2、配置文件（application.yml）

spring:datasource:url: jdbc:mysql://localhost:3306/abc?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=falsedriver-class-name: com.mysql.cj.jdbc.Driverusername: rootpassword: adminjpa:hibernate:ddl-auto: updateshow-sql: true

3、创建实体类

package com.example.bean;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;@Entity
@Table(name="_user")
public class User {@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Integer id;private String lastName;private String email;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getLastName() {return lastName;}public void setLastName(String lastName) {this.lastName = lastName;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}}

4、创建实现JPA的接口

package com.example.dao;import org.springframework.data.jpa.repository.JpaRepository;import com.example.bean.User;public interface UserResposity extends JpaRepository<User, Integer>{}

5、调用测试

package com.example.controller;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;import com.example.bean.User;
import com.example.dao.UserResposity;@RestController
public class UserController {@AutowiredUserResposity userResposity;@GetMapping("/user/{id}")public User get(@PathVariable("id") int id){return userResposity.findOne(id);}@GetMapping("/user")public User add(User user){return userResposity.saveAndFlush(user);}
}