SpringBoot(1) ------>整合Jpa

一、SpringBoot整合Jpa

1、向pom文件添加依赖

        <!--jpa依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!--mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>

2、application.yml配置

#配置端口号
server:
  port: 9000

#数据库配置
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/springboot_test?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver
  #jpa配置
  jpa:
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL5InnoDBDialect
        format_sql: true
    show-sql: true

3、entity

 添加@Entity注解,指定表名

**
 * @author liangd
 * date 2020-12-04 09:03
 * code 部门表
 */
@Entity(name = "dept")
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode
public class DeptEntity implements Serializable {
    /**
     * Id自动递增
     */
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private String deptName;
    private String deptCode;

}

4、repository

  继承JpaRepository接口,可以直接调用Jpa的接口方法

/**
 * @author liangd
 * date 2020-12-04 09:27
 * code 继承Jpa接口
 */
public interface IDeptRepository extends JpaRepository<DeptEntity,Integer> {

}

二、Jpa根据实体自动建表

1、Project structure > modules > +(左侧) 搜索 jpa > 双击 (右侧 ‘+’ 号)>persistence.xml

  Default jpa provider > hibernate >apply >ok

 

 

 

 

 

 

 

2、provider选择hibernate

 

3、点击ok项目左下角会出现一个Persistence,展开-->右击项目-->选择schema,如图

 

4、下一步,选择数据源,包名,前缀后缀以及要自动生成数据库表的实体,点击ok即可生成

 

 

posted @ 2021-01-16 18:16  donleo123  阅读(109)  评论(0编辑  收藏  举报