对象关系2（一对一单双向外键关联)

最新推荐文章于 2019-02-13 18:22:24 发布

hong_ma

最新推荐文章于 2019-02-13 18:22:24 发布

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分类专栏： Hibernate

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本文展示了一个使用Java和JPA实现的一对一关联映射的例子。在这个例子中，定义了Husband和Wife两个实体类，并通过@OneToOne和@JoinColumn注解建立了它们之间的关联关系。


@Entity
public class Husband {
	private int id;
	private String name;
	private Wife wife;
	@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;
	}
	@OneToOne
	@JoinColumn(name="wifeId")
	public Wife getWife() {
		return wife;
	}
	public void setWife(Wife wife) {
		this.wife = wife;
	}
}

@Entity
public class Wife {
	private int id;
	private String name;
	private Husband husband;

	@OneToOne(mappedBy="wife")
	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;
	}
}