8.hibernate一对一双向外键关联,jpa映射

最新推荐文章于 2020-11-18 16:02:15 发布

原创最新推荐文章于 2020-11-18 16:02:15 发布 · 131 阅读

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#hibernate #一对一 #双向外键关联 #jpa映射

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本文介绍了一个使用Hibernate框架实现的Husband与Wife表之间的双向一对一关联关系示例。通过Java实体类展示了如何定义这种关联关系，并在数据库中实现对应的表结构。

husband表结构:
[img]http://dl.iteye.com/upload/attachment/592490/07008a28-3ac9-30e7-a3e0-93d38a55e599.jpg[/img]
wife表结构
[img]http://dl.iteye.com/upload/attachment/592488/a0274cbe-2211-3562-b052-4047a1213f43.jpg[/img]


package com.bjsxt.hibernate;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

@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
	@JoinColumn(name="wifeId")
	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;
	}

}


package com.bjsxt.hibernate;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;

@Entity
public class Wife {
	private int id;
	private String name;
	private Husband husband;
	@OneToOne(mappedBy="wife")//关联关系由Husband的wife确定
	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;
	}

}