Hibernate之one-to-one单向外键关联Annotation

最新推荐文章于 2025-12-05 17:02:52 发布

最新推荐文章于 2025-12-05 17:02:52 发布 · 115 阅读

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#java #数据库

本文介绍了一种使用Java Hibernate框架实现的一对一关联关系映射方法，并展示了如何通过Husband和Wife两个类来实现数据库表之间的外键关联。

Husband.java

package com.itmyhome.model; 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生成策略 mysql默认是auto_crement */ @Id @GeneratedValue public int getId() { return id; } public void setId(int id) { this.id = id; } /* * OneToOne * JoinColumn用来指定生成的外键名字 */ @OneToOne @JoinColumn(name="wifeId") public Wife getWife() { return wife; } public void setWife(Wife wife) { this.wife = wife; } public String getName() { return name; } public void setName(String name) { this.name = name; } }

Wife.java

package com.itmyhome.model; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class Wife { private int id; private String name; @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; } }

hibernate为我们生成的表结构为：

create table Husband ( id integer not null auto_increment, name varchar(255), wifeId integer, primary key (id) ) create table Wife ( id integer not null auto_increment, name varchar(255), primary key (id) ) alter table Husband add index FKAEEA401B78A8164D (wifeId), add constraint FKAEEA401B78A8164D foreign key (wifeId) references Wife (id)