hibernate one2one
Posted 跳刀玛利亚
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package com.bjsxt.hibernate;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
@Entity
public class Husband {
@Id
@GeneratedValue
private int id;
private String name;
@OneToOne // （1 一对一关系 @OneToOne（mappedBy="husband"）//在对应的 wife表中husband_id 对应当前主键id）
//（2 mappedBy = "husband"-------对应的是 Wife类里面的 成员变量Husband husband--变量名 而不是getter方法名）
//（3 Wife 类 里面有对应的 Husband 成员变量 并却是 @OneToOne 关系）
@JoinColumn(name="wife_id") //joinColumn 在当前表中 添加字段 （wife_id） 对应的外键id 为 wife里的主键id
private Wife wife;
public int getId() {
return id;
}
public String getName() {
return 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;
}
}
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package com.bjsxt.hibernate;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;
@Entity
public class Wife {
@Id
@GeneratedValue
private int id;
private String name;
@OneToOne
private Husband husband;
public Husband getHusband() {
return husband;
}
public void setHusband(Husband husband) {
this.husband = husband;
}
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;
}
}
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