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<!-- 有辨別者列 -->

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.lixuan.hibernate.subclass">
    <class name="Person" table="PERSONS" discriminator-value="PERSON">
        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <generator class="native" />
        </id>
        
        <!-- 配置辨別者列 -->
        <discriminator column="TYPE" type="string" ></discriminator>
        
        <property name="name" type="java.lang.String">
            <column name="NAME" />
        </property>
        <property name="age" type="int">
            <column name="AGE" />
        </property>
        
        <!-- 對映子類  Student,使用subclass進行對映
        subclass的discriminator-value屬性指定辨別者列的值
         -->
        <subclass name="Student" discriminator-value="STUDENT">
        <property name="school" type="string" column="SCHOOL"></property>
        </subclass> 
    </class>
</hibernate-mapping>

<!-- 無辨別這列 -->

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.lixuan.hibernate.union.subclass">
    <class name="Person" table="PERSONS">
        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <generator class="native" />
        </id>
        
        <property name="name" type="java.lang.String">
            <column name="NAME" />
        </property>
        <property name="age" type="integer">
            <column name="AGE" />
        </property>
        
       <union-subclass name="Student" table="STUDENTS">
       <property name="school" column="SCHOOL" type="string"></property>
       </union-subclass>
    </class>

</hibernate-mapping>

關於Struts2 130529143交流。
有償技術支援Q群：398162181