hibernate继承映射之每个具体类一张表

数据模型

表person

表student

表worker

对象模型

Person 
    private String id;
    private String name;
    private int age;
    private String sex;

 Student extends Person 
     private String school;

Worker extends Person 
    private String factory;

 

xml配置：

<?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 package="com.skuedu.bean">
   <class name="Person" table="person">
     <id name="id" length="32">
           <generator class="uuid"></generator>
     </id>
     <property name="name"  length="30"></property>
     <property name="age"   ></property>
     <property name="sex"  length="10"></property>
     
     <union-subclass name="Student"  table="student">
         <property name="school"></property>
     </union-subclass>
     
     <union-subclass name="Worker" table="worker" >
         <property name="factory"></property>
     </union-subclass>
  </class>
</hibernate-mapping>

测试代码：

     
    @Test
     public void testSaveStudent(){
         Session session = HibernateUtil.getSession();
         Transaction transaction = session.beginTransaction();
         try{
             Student student = new Student();
             student.setAge(20);
             student.setName("小王");
             student.setSchool("清华大学");
             student.setSex("男");
             session.save(student);
             transaction.commit();
         }catch(Exception e){
             transaction.rollback();             
         }finally{
             HibernateUtil.closeSession(session);
         }
     }
    
    
    @Test
     public void testSaveWorker(){
         Session session = HibernateUtil.getSession();
         Transaction transaction = session.beginTransaction();
         try{
             Worker worker = new Worker();
             worker.setAge(20);
             worker.setName("小李");
             worker.setFactory("首钢");
             worker.setSex("男");
             session.save(worker);
             transaction.commit();
         }catch(Exception e){
             transaction.rollback();             
         }finally{
             HibernateUtil.closeSession(session);
         }
     }
    
    @Test
    public void testFind(){
        
         }