Springboot引入hibernate配置自动建表并进行增删改查操作

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

server:
  port: 8081
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true
    username: root
    password: root
  jpa:
    hibernate:
      ddl-auto: update
    # 打印SQL语句
    show-sql: true

package com.xuyijie.test.entity;

import jakarta.persistence.*;
import lombok.Data;
import org.hibernate.annotations.GenericGenerator;

/**
 * @author 徐一杰
 * @date 2022/9/19 17:25
 * @description
 */
//JPA(Hibernate)的实体类注解
@Entity
//表名
@Table(name = "people")
//Lombok
@Data
public class People {
    
    //Id代表这是主键，GeneratedValue和GenericGenerator设置主键策略是UUID
    @Id
    @GeneratedValue(generator = "id")
    @GenericGenerator(name = "id", strategy = "uuid.hex")
    private String id;

    //Column可以不写，name是数据库中的字段名，如果数据库中要新建的对应字段也叫name，可以不写，columnDefinition指定字段在数据库中的类型、长度、注释等
    @Column(name = "name", columnDefinition="varchar(255) NOT NULL COMMENT '名字'")
    private String name;

    @Column(name = "sex", columnDefinition="varchar(2) NOT NULL COMMENT '性别'")
    private String sex;

    @Column(name = "age", columnDefinition="int")
    private Integer age;
}

package com.xuyijie.test.mapper;

import com.xuyijie.test.entity.People;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

/**
 * @author 徐一杰
 * @date 2022/9/19 17:42
 * @description
 */
@Repository
public interface PeopleMapper extends JpaRepository<People, String> {
}

package com.xuyijie.test.controller;

import com.xuyijie.test.entity.People;
import com.xuyijie.test.mapper.PeopleMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author 徐一杰
 * @date 2022/9/19 17:12
 * @description
 */
@RestController
@RequestMapping("/test")
public class Test {
    @Autowired
    private PeopleMapper peopleMapper;

    @GetMapping("/hello/{str}")
    public String Hello(@PathVariable String str){
        People people = new People();
        people.setName(str);
        people.setSex("男");
        // 这里的save和findAll都是hibernate自带的方法，里面还有很多内置方法
        peopleMapper.save(people);
        System.out.println(peopleMapper.findAll());
        return str;
    }
}