Hibernate关联映射-one to one主键双向关联

 

这次,继续上一次的实例。 记录1对1 主键双向关联.

还是Person和 Address为例.

 

请直接看代码:

Person_SX_PK_One_to_One:

public class Person_SX_PK_One_to_One {
	private Integer id;
	private String name;
	private Integer age;
	private Address_SX_PK_One_To_One addressSXPKOneToOne;

//getter和setter方法省略
}

 

Address_SX_PK_One_To_One：

public class Address_SX_PK_One_To_One {
	private Integer id;
	private String addressDetail;
	private Person_SX_PK_One_to_One personSXPKOneToOne;
	
//getter和setter方式省略
}

 

 

Hibernate配置文件:

Person_SX_PK_One_to_One.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="pack.java.model.Person_SX_PK_One_to_One" table="ZHT_PERSON_SX_PK_ONE_TO_ONE">
		<id name="id" column="ID">
			<generator class="identity"></generator>
		</id>
		
		<property name="name" column="NAME"></property>
		<property name="age" column="AGE"></property>
		
		<!-- 1对1，引用address对象， -->
		<one-to-one 
			name="addressSXPKOneToOne" 
			class="pack.java.model.Address_SX_PK_One_To_One" 
			fetch="select" 
			lazy="false"
			cascade="all">
		</one-to-one>
	</class>
</hibernate-mapping>

 

Address_SX_PK_One_To_One.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="pack.java.model.Address_SX_PK_One_To_One" table="ZHT_ADDRESS_SX_PK_ONE_TO_ONE">
		<id column="ID" name="id">
			<!-- generator 主键生成策略，配制成foreign，外键，是引用主表person的对象。 -->
			<generator class="foreign">
				<param name="property">personSXPKOneToOne</param>
			</generator>
		</id>
		
		<property name="addressDetail" column="ADDRESSDETAIL"></property>
		
		<!-- 表示在address表中，存在外键约束，外键参考相关表person对象。 -->
		<one-to-one name="personSXPKOneToOne" constrained="true"></one-to-one>
	</class>
</hibernate-mapping>

 

 

在Hibernate.cfg.xml配置刚刚添加的两个映射hibernate.hbm.xml文件。

 

配置好之后,就进行测试.

写一个Test类,

 

package pack.java.test;

import org.hibernate.Session;
import pack.java.hibernate.HibernateSessionFactory;
import pack.java.model.Address_SX_PK_One_To_One;
import pack.java.model.Person_SX_PK_One_to_One;
/**
 * 1对1，主键双向关联。
 * @author Administrator
 *
 */
public class HibernateDemoXS_PK_OneToOne {
	public static void main(String[] args) {
		HibernateDemoXS_PK_OneToOne demoXSPKOneToOne = new HibernateDemoXS_PK_OneToOne();
		Session session = demoXSPKOneToOne.getSession();
	
		//保存操作;
		demoXSPKOneToOne.savePerson(session);
		
		//查询;
		Person_SX_PK_One_to_One  personSXPKOneToOne = demoXSPKOneToOne.queryPersonBy(1);
		
		System.out.println("\n结果查询如下:");
		System.out.println(personSXPKOneToOne.getId()+","+personSXPKOneToOne.getName()+","+personSXPKOneToOne.getAge()+","+personSXPKOneToOne.getAddressSXPKOneToOne().getAddressDetail());
		
		//更新；
		demoXSPKOneToOne.updatePersonByPersonID(1);
		
		//再次查询;
		personSXPKOneToOne = demoXSPKOneToOne.queryPersonBy(1);
		System.out.println("\n结果查询如下:");
		System.out.println(personSXPKOneToOne.getId()+","+personSXPKOneToOne.getName()+","+personSXPKOneToOne.getAge()+","+personSXPKOneToOne.getAddressSXPKOneToOne().getAddressDetail());
		
	}
	
	/**
	 * 根据Person编号，查询Person对象;
	 * @param personID
	 */
	private Person_SX_PK_One_to_One queryPersonBy(Integer personID){
		//获取session；
		Session session = getSession();
		Person_SX_PK_One_to_One personSXPKOneToOne  = (Person_SX_PK_One_to_One) session.load(Person_SX_PK_One_to_One.class, personID);
		return personSXPKOneToOne;
	}
	
	/**
	 * 更新操作;
	 * @param personID
	 */
	private void updatePersonByPersonID(Integer personID){
		//先查询出person，然后，在更新；
		Person_SX_PK_One_to_One personSXPKOneToOne = queryPersonBy(personID);
		
		personSXPKOneToOne.setName("张无忌");
		personSXPKOneToOne.setAge(23);
		
		//获取session；
		Session session = getSession();
		
		//开始事务，更新操作， 提交事务。
		session.beginTransaction().begin();
		session.update(personSXPKOneToOne);
		session.beginTransaction().commit();
		session.close();
	}
	
	/**
	 * 保存
	 * @param session
	 */
	private void savePerson(Session session){
		Person_SX_PK_One_to_One person = new Person_SX_PK_One_to_One();
		person.setAge(63);
		person.setName("张三丰");
		
		Address_SX_PK_One_To_One address = new Address_SX_PK_One_To_One();
		address.setAddressDetail("北京市朝阳区东三环北路");
		
		//给person设置address;
		person.setAddressSXPKOneToOne(address);
		
		//给address设置person;
		address.setPersonSXPKOneToOne(person);
		
		//保存操作;
		session.beginTransaction().begin();
		session.save(person);
		session.beginTransaction().commit();
		session.close();
		System.out.println("保存成功!");
	}
	
	/**
	 * 获取session;
	 * @return
	 */
	private Session getSession(){
		return HibernateSessionFactory.getSession();
	}
}

 

 

控制台输出如下:

 

保存成功!

 

结果查询如下:
1,张三丰,63,北京市朝阳区东三环北路

 

结果查询如下:
1,张无忌,23,北京市朝阳区东三环北路