Hibernate关联映射-one to one主键双向关联
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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.
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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}?
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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 column="NAME"></property><property name="age" column="AGE"></property><!-- 1对1，引用address对象， --><one-to-one name="addressSXPKOneToOne" fetch="select" lazy="false"cascade="all"></one-to-one></class></hibernate-mapping>
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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 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>
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在Hibernate.cfg.xml配置刚刚添加的两个映射hibernate.hbm.xml文件。
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配置好之后,就进行测试.
写一个Test类,
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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();}}?
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控制台输出如下:
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保存成功!
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结果查询如下:
1,张三丰,63,北京市朝阳区东三环北路
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结果查询如下:
1,张无忌,23,北京市朝阳区东三环北路