hibernate的基础学习--一对一关联

一对一关系以丈夫和妻子模型

配置文件

妻子配置文件：

<?xml version="1.0" encoding="utf-8" ?>

<!DOCTYPE hibernate-mapping PUBLIC

    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<!-- 映射配置 -->

<hibernate-mapping>

    <class name="hib.po.Wife" table="t_wife">

        <id name="wifeId" column="wife_id">

            <generator class="uuid"></generator>

        </id>

        <property name="wifeName" column="wifename"></property>

    </class>

</hibernate-mapping>

丈夫配置文件

 <?xml version="1.0" encoding="utf-8" ?>

 <!DOCTYPE hibernate-mapping PUBLIC

     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

 <!-- 映射配置 -->

 <hibernate-mapping>

     <class name="hib.po.Husband" table="t_husband">

         <id name="husId" column="hus_id">

             <generator class="uuid"></generator>

         </id>

         <!-- 普通属性和普通字段映射 -->

         <property name="husName" column="husname"></property>

         <!-- 关联关系：和Wife的one2one

             特殊的many2one

          -->

         <many-to-one

             name="wife"

             class="hib.po.Wife"

             column="wife_id"

             unique="true"

          ></many-to-one>

     </class>

 </hibernate-mapping>

测试代码：

 /**

  * @author nunu

  * 测试hibernate OneToMany

  */

 public class TestHibernateOneToOne {

     /**

      * 添加数据

      */

     @Test

     public void addUser() {

         SessionFactory sf = H3Util.getSessionFactory();

         Session session = sf.openSession();

         Transaction ts = session.beginTransaction();

         Husband hus1 = new Husband(null, "小明", null);

         Husband hus2 = new Husband(null, "小强", null);

         Wife wife1 = new Wife(null, "小花");

         Wife wife2 = new Wife(null, "小丽");

         session.save(hus1);

         session.save(hus2);

         session.save(wife1);

         session.save(wife2);

         System.out.println("成功");

         ts.commit();

         session.close();

     }

     @Test

     public void updateHusband() {

         SessionFactory sf = H3Util.getSessionFactory();

         Session session = sf.openSession();

         Transaction ts = session.beginTransaction();

         Husband hus1 = (Husband) session.get(Husband.class, "4028810a57d16fe00157d16fe3450000");

         Husband hus2 = (Husband) session.get(Husband.class, "4028810a57d16fe00157d16fe3590001");

         Wife wife1 = (Wife) session.get(Wife.class, "4028810a57d16fe00157d16fe3590002");

         Wife wife2 = (Wife) session.get(Wife.class, "4028810a57d16fe00157d16fe3590003");

         //维护

         hus1.setWife(wife1);

         hus2.setWife(wife2);

         //update：使用一级缓存中的快照，如果检测没有发生改变，不会发送任何修改语句

         session.update(hus1);

         session.update(hus2);

         System.out.println(hus1);

         System.out.println(hus2);

         ts.commit();

         session.close();

     }

 }