创建maven项目

添加maven依赖

<?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>mq</groupId>
    <artifactId>jpsa_hibernate</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
        <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.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

</project>

application.yml 配置

spring:
  datasource:
    url: jdbc:mysql:///test3
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
  jpa:
    show-sql: true
    hibernate:
      ddl-auto: create
    properties:
      hibernate:
        format_sql: true
        dialect: org.hibernate.dialect.MySQL5Dialect
server:
  port: 8081

启动类

@SpringBootApplication
public class App {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

po类

package com.po;

import javax.persistence.*;
import java.io.Serializable;

@Entity
@Table(name = "t_user")
public class User implements Serializable {
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Id
    private Integer id;
    private String username;
    private String password;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

使用

@RestController
public class TestController {
    @Resource
    private EntityManagerFactory entityManagerFactory;
    @RequestMapping("/a")
    public String aaa(){
        SessionFactory sessionFactory = entityManagerFactory.unwrap(SessionFactory.class);
        Session session = sessionFactory.openSession();
        User user = new User();
        user.setPassword("32341");
        user.setUsername("adsasdas");
        session.save(user);
        return "";
    }
}

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