一对一双向外键联系关系

一对一双向外键关联

妻子和丈夫：  在丈夫表里面有妻子的外键

学生和学生证：  在学生证表里面有学生的外键

 

 

第一种：Annotation配置

package com.zchen.hibernate.oneTone;

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

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

}

 

 

package com.zchen.hibernate.oneTone;

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

@Entity
@Table(name="T_WIFE")
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;
	}

}

 

 第二种：xml配置

package com.zchen.hibernate.oneTone;

public class Student {
	private int id;
	private String name;
	private StudentIdCard stuIdCard;
	
	public StudentIdCard getStuIdCard() {
		return stuIdCard;
	}
	public void setStuIdCard(StudentIdCard stuIdCard) {
		this.stuIdCard = stuIdCard;
	}
	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;
	}

}

 

package com.zchen.hibernate.oneTone;

public class StudentIdCard {
	private int id;
	private String name;
	private Student student;
	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;
	}
	public Student getStudent() {
		return student;
	}
	public void setStudent(Student student) {
		this.student = student;
	}
	

}

 

 

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.zchen.hibernate.oneTone">

    <class name="StudentIdCard" table="T_STUIDCARD">
        <id name="id" column="ID">
            <generator class="native"/>
        </id>
        <property name="name" column="NAME"/>
        <many-to-one name="student" column="STUID" unique="true"></many-to-one>
    </class>

</hibernate-mapping>

 

 

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.zchen.hibernate.oneTone">

    <class name="Student" table="T_STU">
        <id name="id" column="ID">
            <generator class="native"/>
        </id>
        <property name="name" column="NAME"/>
   		<one-to-one name="stuIdCard" property-ref="student"></one-to-one>
    </class>

</hibernate-mapping>