使用annotation配置hibernate（3）：一对一关系配置

@Entity
@Table(name = "student")
public class Student {
@Id
@Column(name = "id")
@GenericGenerator(name = "generator",strategy = "native")
@GeneratedValue(generator = "generator")
private int id;

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

@OneToOne(cascade=CascadeType.ALL)
@PrimaryKeyJoinColumn//这个注解只能写在生成ID的一端
private IDCard idCard;

}

@Entity
@Table(name = "idcard")
public class IDCard {
@Id
@GenericGenerator(name = "fkgenerator",parameters = {@Parameter(name = "property",value = "student")}, strategy = "foreign")
@GeneratedValue(generator = "fkgenerator")
private int id;

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

@OneToOne(cascade=CascadeType.ALL,mappedBy = "idCard")
private Student student;
}

@Entity
@Table(name = "student")
public class Student {
@Id
@Column(name = "id")
@GenericGenerator(name = "generator",strategy = "uuid")
@GeneratedValue(generator = "generator")
private String id;

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

@OneToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "idcard")
private IDCard idCard;
}

@Entity
@Table(name = "idcard")
public class IDCard {
@Id
@Column(name = "id")
@GenericGenerator(name = "generator",strategy = "uuid")
@GeneratedValue(generator = "generator")
private String id;

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

@OneToOne(mappedBy = "idCard")
private Student student;

}