Hibernate 一对一关联映射

package com.entity;



import javax.persistence.Entity;

import javax.persistence.OneToOne;



@Entity

public class Husband extends BaseEntity {

	@OneToOne(mappedBy = "husband")

	private Wife wife;

	public Wife getWife() {

		return wife;

	}



	public void setWife(Wife wife) {

		this.wife = wife;

	}



	private String name;



	public String getName() {

		return name;

	}



	public void setName(String name) {

		this.name = name;

	}



}

husband.java

package com.entity;



import javax.persistence.Entity;

import javax.persistence.JoinColumn;

import javax.persistence.ManyToOne;



@Entity

public class Wife extends BaseEntity {

	private String name;

	

	@ManyToOne

	@JoinColumn(name="husband_id",unique=true)

	private Husband husband;

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public Husband getHusband() {

		return husband;

	}

	public void setHusband(Husband husband) {

		this.husband = husband;

	}

	

}

 wife.java

 

package com;



import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.Configuration;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;



import com.entity.Food;

import com.entity.Husband;

import com.entity.User;

import com.entity.Wife;

import com.entity.student.Classes;

import com.entity.student.Teacher;



public class Test1 {

	private Session s;

	private Transaction tran;

	@Before

	public void before(){

		s=HibernateUtils.getSession();

		tran=s.beginTransaction();

	}

	

	public void test(){

		

		User user=(User)s.get(User.class,7);

		//持久太

		//user.setUsername("xixixi");

		//修改后不用save直接提交也可保存

		tran.commit();

		s.clear();//使对象与session没有关系 ， 脱离持久太

		

		//把游离态的user变成持久态

		tran=s.beginTransaction();

		s.update(user);

		user.setPassword("789");

		tran.commit();

		

		//将对象变成顺时太

		tran=s.beginTransaction();

		s.delete(user);

		tran.commit();

	}

	



	public void one2one(){

		Husband h=new Husband();

		Wife w=new Wife();

		//创建两个瞬时对象

		h.setName("xiaoming");

		w.setName("baby");

		w.setHusband(h);

		s.save(w);

		s.save(h);

		

	}

	@Test

	public void one2oneQuery(){

		Husband h=(Husband)s.get(Husband.class, 2);

		System.out.println(h.getName()+"-------------"+h.getWife().getName());

	}

	

	

	

	@After 

	public void after(){

		tran.commit(); 	

		HibernateUtils.closeSession(s);

	}

	

}

 test1.java