Hibernate关系映射(5)_一对一单向联合主键关联

最新推荐文章于 2025-07-28 23:27:29 发布

原创最新推荐文章于 2025-07-28 23:27:29 发布 · 1k 阅读

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#hibernate #string #class

本文介绍了一种使用Java实现的一对一关联映射方法，并通过Husband和Wife两个类展示了如何配置双主键实体之间的关联关系。

Annotation方式：

在Husband.java中持有Wife的引用，Wife.java中没有Husband的引用,增加一个双主键辅助类WifePK.java。/* * 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 @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; } }

/* * Wife.java */ @Entity @IdClass(WifePK.class) public class Wife { private int id; private String name; private int age; @Id public int getId() { return id; } public void setId(int id) { this.id = 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; } }

/* * WifePK.java */ public class WifePK implements Serializable { private int id; private String name; 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; } }