7.hibernate一对一双向外键联系关系,xml映射

7.hibernate一对一双向外键关联,xml映射
stuidcard表结构:

student表结构:

package com.bjsxt.hibernate;

public class Student {
	
	private int id;
	private String name;
	
	private int age;
	private String sex;
	private boolean good;
	private StuIdCard stuIdCard;
	public StuIdCard getStuIdCard() {
		return stuIdCard;
	}
	public void setStuIdCard(StuIdCard stuIdCard) {
		this.stuIdCard = stuIdCard;
	}
	public boolean isGood() {
		return good;
	}
	public void setGood(boolean good) {
		this.good = good;
	}
	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 int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	
	
	
}

package com.bjsxt.hibernate;

public class StuIdCard {
	private int id;
	private String num;
	private Student student;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getNum() {
		return num;
	}
	public void setNum(String num) {
		this.num = num;
	}
	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>
	<class name="com.bjsxt.hibernate.StuIdCard">
		<id name="id">
			<generator class="native"></generator>
		</id>
		
		<property name="num"/>
                  <!-- 外键在这边, 所以映射成many-to-one 用唯一键约束 -->
		<many-to-one name="student" column="studentId" 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>
	<class name="com.bjsxt.hibernate.Student" dynamic-update="true">
		<id name="id">
			<generator class="native"></generator>
		</id>
		
		<property name="name"></property>
		<property name="age" />
		<property name="sex" />
		<property name="good" type="yes_no"></property>
		<one-to-one name="stuIdCard" property-ref="student"></one-to-one>
    </class>
	
</hibernate-mapping>