hibernate 继承映射subclass

<?xmlversion="1.0"?>

<!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!-- Generated 2016-7-13 21:21:16 byHibernate Tools 3.4.0.CR1 -->

<hibernate-mapping>

   <classname="com.lidongyang.hibernate.Person"table="PERSON"discriminator-value="PERSON">

       <idname="id"type="java.lang.Integer">

           <columnname="ID"/>

           <generatorclass="native"/>

       </id>

       <discriminatorcolumn="TYPE"type="string"></discriminator>

       <propertyname="name"type="java.lang.String">

           <columnname="NAME"/>

       </property>

       <propertyname="age"type="java.lang.Integer">

           <columnname="AGE"/>

       </property>

       <subclassname="com.lidongyang.hibernate.Student"discriminator-value="Student">

            <propertyname="school"type="string"column="SCHOOL"></property>

       </subclass>

   </class>

</hibernate-mapping>