hibernate使用joined-subclass时子表无法插入数据

    <property name="name" type="java.lang.String">
        <column name="NAME"></column>
    </property>

    <property name="age" type="int">
        <column name="AGE"></column>
    </property>

    <joined-subclass name="Student" table="STUDENTS">
        <key column="STUDENT_id"></key>
        <property name="school" type="string" column="SCHOOL"></property>
    </joined-subclass>

</class>    

http://blog.csdn.net/id19870510/article/details/5527372