springboot 集成 spring data jpa

1、引入依赖

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

2、application.yaml配置

spring:
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

3、创建实体类

@Entity
@Table(name = "t_user")
@Getter
@Setter
public class JpaUser {

    @Id	//主键id
    @GeneratedValue(strategy= GenerationType.IDENTITY)//主键生成策略
    @Column(name="id")//数据库字段名
    private Integer id;

    @Column(name = "name")
    private String name;

    @Column(name = "password")
    private String password;
}

4、创建dao

public interface JapUserDao extends JpaRepository<JpaUser, Integer> {
    List<JpaUser> findAllById(Integer id);
}

5、之后便可以在service中注入