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Hibernate學習（三）---【一對一主鍵雙向關聯】

Person和IdCard一對一雙向關聯
Person.java

package com.zzn.hibernate.OneToOne;

public class Person {
    private int id;
    private String name;
    private int age;

    //雙向關聯需要加上Idcard的屬性
    private IdCard idCard;
    public IdCard getIdCard() {
        return idCard;
    }
    public void setIdCard(IdCard idCard) {
        this.idCard = idCard;
    }
    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;
    }

}

IdCard.java

package com.zzn.hibernate.OneToOne;

public class IdCard {
    private int id;
    private String cardNo;
    //雙向關聯需要加上person的屬性；
    private Person person;

    public Person getPerson() {
        return person;
    }
    public void setPerson(Person person) {
        this.person = person;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getCardNo() {
        return cardNo;
    }
    public void setCardNo(String cardNo) {
        this.cardNo = cardNo;
    }

}

Person.hbm.xml

<?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.zzn.hibernate.OneToOne.Person" table="PERSON">
        <id name="id" column="id">
            <generator class="foreign">
                <param name="property">idCard</param>
            </generator>
        </id>
        <property name="name" />
        <property name="age" />
        <one-to-one name="idCard" constrained="true" />
    </class>
</hibernate-mapping>

Idcard.hbm.xml

<?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.zzn.hibernate.OneToOne.IdCard" table="ID_CARD">
        <id name="id" column="id">
            <generator class="native" />
        </id>
        <property name="cardNo" />
        <one-to-one name="person" />
    </class>
</hibernate-mapping>

test

package com.zzn.hibernate;

import junit.framework.TestCase;

import org.hibernate.Session;

import org.hibernate.Transaction;

import com.zzn.hibernate.OneToOne.IdCard;

import com.zzn.hibernate.OneToOne.Person;

import com.zzn.hibernate.hibernateUtil.HibernateUtils;

public class OneToOne_pk2 extends TestCase {

public void OneToOne_pk2_1() {

Session session = null;

Transaction tx = null;

try {

session = HibernateUtils.getSession();

tx = session.beginTransaction();

IdCard idCard = new IdCard();

Person person = new Person();

idCard.setCardNo("11111111");

person.setName("劉德華");

person.setAge(50);

person.setIdCard(idCard);

System.out.println("person's name = " + person.getName());

System.out.println("idCard's cardNo = "

+ person.getIdCard().getCardNo());

} catch (Exception e) {

e.printStackTrace();

} finally {

if (session != null) {

if (session.isOpen()) {

tx.commit();

session.close();

}

public void OneToOne_pk2_2() {

Session session = null;

Transaction tx = null;

try {

session = HibernateUtils.getSession();

tx = session.beginTransaction();

IdCard idCard = new IdCard();

Person person = new Person();

person.setName("周杰倫");

person.setAge(30);

idCard.setCardNo("2222222");

idCard.setPerson(person);

System.out.println("idCard's number = " + idCard.getCardNo());

System.out.println("person's name = "

+ idCard.getPerson().getName());

} catch (Exception e) {

e.printStackTrace();

} finally {

tx.commit();

HibernateUtils.closeSession(session);

}

posted on 2009-11-01 12:08 生命的綻放閱讀(448) 評論(0) 編輯收藏所屬分類: Hibernate

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