使用annotation配置hibernate（3）：一对一关系配置

主键一对一

数据库表结构

Student.java

 1 @Entity
 2 @Table(name = "student")
 3 public class Student {
 4     @Id
 5     @Column(name = "id")
 6     @GenericGenerator(name = "generator",strategy = "native")
 7     @GeneratedValue(generator = "generator")
 8     private int id;
 9     
10     @Column(name = "name")
11     private String name;
12     
13     @OneToOne(cascade=CascadeType.ALL)
14     @PrimaryKeyJoinColumn//这个注解只能写在生成ID的一端
15     private IDCard idCard;
16     
17 }

 

IDCard.java

 1 @Entity
 2 @Table(name = "idcard")
 3 public class IDCard {
 4     @Id
 5     @GenericGenerator(name = "fkgenerator",parameters = {@Parameter(name = "property",value = "student")}, strategy = "foreign")
 6     @GeneratedValue(generator = "fkgenerator")
 7     private int id;
 8     
 9     @Column(name = "num")
10     private String num;
11     
12     @OneToOne(cascade=CascadeType.ALL,mappedBy = "idCard")
13     private Student student;
14 }

 

 

外键一对一

数据库表结构

Student.java

 1 @Entity
 2 @Table(name = "student")
 3 public class Student {
 4     @Id
 5     @Column(name = "id")
 6     @GenericGenerator(name = "generator",strategy = "uuid")
 7     @GeneratedValue(generator = "generator")
 8     private String id;
 9     
10     @Column(name = "name")
11     private String name;
12         
13     @OneToOne(cascade=CascadeType.ALL)
14     @JoinColumn(name = "idcard")
15     private IDCard idCard;
16 }

 

IDCard.java

 1 @Entity
 2 @Table(name = "idcard")
 3 public class IDCard {
 4     @Id
 5     @Column(name = "id")
 6     @GenericGenerator(name = "generator",strategy = "uuid")
 7     @GeneratedValue(generator = "generator")
 8     private String id;
 9     
10     @Column(name = "num")
11     private String num;
12     
13     @OneToOne(mappedBy = "idCard")
14     private Student student;
15     
16 }

 

 

posted on 2014-07-09 14:50  幸福小弥  阅读(165)  评论(0)  编辑  收藏  举报