Hibernate关系映射中的注解

一、@Entity

  写在映射表的类上面,表示这是映射来的实体

二、@Id
  @Column(name = "fid", nullable = false)

  

@Basic
  @Column(name = "fname", nullable = true, length = 10)

 

四、@OneToMany(mappedBy = "father",cascade = {CascadeType.ALL})(父亲端)

  @ManyToOne
  @JoinColumn(name = "fid", referencedColumnName = "fid")(儿子端)

  写在一对多的外键属性上,儿子那个属性被定义为一个set集。

 

五、@OneToOne(cascade ={CascadeType.ALL})(all代表各种操作一个丈夫,都会关联到妻子)
  @JoinColumn(name = "id", referencedColumnName = "id", nullable = false)(丈夫端)

  @OneToOne
  @JoinColumn(name = "id", referencedColumnName = "id", nullable = false)

  写在一对一的外键属性上,都定义为一个String属性了。

 

六、@Cascade(value=org.hibernate.annotations.CascadeType.SAVE_UPDATE)
  @ManyToMany()
  @JoinTable(name = "teastu", catalog = "res", schema = "res", joinColumns = @JoinColumn(name = "tid", referencedColumnName = "tid", nullable = false), inverseJoinColumns = @JoinColumn(name = "sid",     referencedColumnName = "sid", nullable = false))(老师端)
  @ManyToMany(mappedBy = "stus")(学生端)

  写在多对多的外键属性上。

 

posted @ 2018-03-31 15:25  彩电  阅读(130)  评论(0编辑  收藏  举报