package org.hibernate.tutorial.domain; public class WifePK implements Serializable { private int id; private String name; public int getId() { return id; } public String getName() { return name; } public void setId(int id) { this.id = id; } public void setName(String name) { this.name = name; } }
设置对象主键
@Entity @IdClass(WifePK.class) public class Wife { private int id; private String name; private String age; @Id public int getId() { return id; } public String getName() { return name; } public void setId(int id) { this.id = id; } @Id public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } }
设置关联
@Entity public class Husband { private int id; private String name; private Wife wife; @Id @GeneratedValue public int getId() { return id; } public String getName() { return name; } @OneToOne @JoinColumns( { @JoinColumn(name="wifeId",referencedColumnName="id"), @JoinColumn(name="wifeName",referencedColumnName="name") } ) public Wife getWife() { return wife; } public void setId(int id) { this.id = id; } public void setName(String name) { this.name = name; } public void setWife(Wife wife) { this.wife = wife; } }
hibernate.hb.xml配置和测试
引用
<mapping class="org.hibernate.tutorial.domain.Husband"/>
<mapping class="org.hibernate.tutorial.domain.Wife"/>
public class OneToOneORMappingTest { public static void main(String[] args) { new SchemaExport(new AnnotationConfiguration().configure("/hibernate.cfg.xml")).create(true, false); } }
结果
alter table Husband drop foreign key FK_sdshifqwgidsm93jdh5kfl0e4 drop table if exists Husband drop table if exists Wife create table Husband ( id integer not null auto_increment, name varchar(255), wifeId integer, wifeName varchar(255), primary key (id) ) create table Wife ( id integer not null, name varchar(255) not null, age varchar(255), primary key (id, name) ) alter table Husband add index FK_sdshifqwgidsm93jdh5kfl0e4 (wifeId, wifeName), add constraint FK_sdshifqwgidsm93jdh5kfl0e4 foreign key (wifeId, wifeName) references Wife (id, name)