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 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>

     @Testpublic 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);}}@Testpublic 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);}}@Testpublic void testFind(){}