JPA OneToMany简单应用

1.单向@OneToMany

1. User实体类

   @Data
   @Entity
   @Table(name = "user")
   public class User {
   
       @Id
       @GeneratedValue(strategy = GenerationType.IDENTITY)
       @Column(name = "id")
       private Long id;
   
       @Column(name = "username")
       private String username;
   
       @OneToMany(cascade = {CascadeType.REMOVE})
       @JoinColumn(name = "article_id")
       private Set<Article> articles;
   
   }

   2.Article实体类

@Data
@Entity
@Table(name = "article")
public class Article {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;
    
    @Column(name = "article_id")
    private Long article_id;    

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

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

}

赏

谢谢你请我吃糖果

支付宝

微信