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();
     }
 }