<hibernate-mapping>
    <class name="表1" table="表1" schema="dbo" >
        <many-to-one name="表2" class="表2" 
            <column name="表2.id" />
        </many-to-one>
        <many-to-one name="表3" class="表3" 
            <column name="表3.id" />
        </many-to-one>
        <many-to-one name="表4" class="表4">
            <column name="表4.id" />
        </many-to-one>
 </class>
</hibernate-mapping>