Hibernate关系映射(4)_一对一双向主键关联

一.Annotation方式：

 

    在Husband.java中持有Wife的引用，Wife.java中也持有Husband的引用(双向主键关联)

/* * Hunsband.java */ @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 @PrimaryKeyJoinColumn 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; } }   

 

/* * Wife.java */ @Entity public class Wife { private int id; private String name; private Husband husband; @OneToOne @PrimaryKeyJoinColumn public Husband getHusband() { return husband; } public void setHusband(Husband husband) { this.husband = husband; } @Id @GeneratedValue public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }

 

 

一.XML方式：

 

 

Student与StuIdCard是一对一关系，StuIdCard.java中持有Student引用,Student.java中也持有StuIdCard的引用(双向主键关联)

package com.szy.hibernate.model; /* * Student.java */ public class Student { private int id; private String name; private int age; private String sex; private boolean good; private StuIdCard stuIdCard; public StuIdCard getStuIdCard() { return stuIdCard; } public void setStuIdCard(StuIdCard stuIdCard) { this.stuIdCard = stuIdCard; } public boolean isGood() { return good; } public void setGood(boolean good) { this.good = good; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } }

 

package com.szy.hibernate.model; /* * StuIdCard.java */ public class StuIdCard { private int id; private String num; private Student student; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getNum() { return num; } public void setNum(String num) { this.num = num; } public Student getStudent() { return student; } public void setStudent(Student student) { this.student = student; } }

 

 

 

 

在Student.hbm.xml中配置映射关系：

<hibernate-mapping> <class name="com.szy.hibernate.model.Student" dynamic-update="true"> <id name="id"> <generator class="native"></generator> </id> <property name="name"></property> <property name="age" /> <property name="sex" /> <property name="good" type="yes_no"></property> <one-to-one name="stuIdCard" property-ref="student"></one-to-one> </class> </hibernate-mapping>

 

 

 

 

在StuIdCard.hbm.xml中配置映射关系：

<hibernate-mapping> <class name="com.szy.hibernate.model.StuIdCard" dynamic-update="true"> <id name="id"> <generator class="native"></generator> </id> <property name="num"></property> <one-to-one name="student" constrained="true"></one-to-one> </class> </hibernate-mapping>