标配BASE
<hibernate-mapping > <class name="mypack.People" table="PEOPLE" > <id name="id" type="long" column="ID"> <generator class="increment"/> </id> <property name="name" type="string" column="NAME" /> </class> </hibernate-mapping>
映射组成关系
<hibernate-mapping > <class name="mypack.People" table="PEOPLE" > <id name="id" type="long" column="ID"> <generator class="increment"/> </id> <property name="name" type="string" column="NAME" /> <component name="hand" class="mypack.HAND"> <parent name="people" /> <property name="color" type="string" column="COLOR"/> </component> </class> </hibernate-mapping>
说明:
1.People和Hand是组合关系,在People类中有个成员是Hand类,名字是hand
2.标签<component>和<property>没多大区别 ,对应一个成员
3.标签<component>和<class>其实也没多大区别,<component>里面可以嵌套<class>能嵌套的东西
比如嵌套他自己<component>或者<set>什么的
3.标签<component>一点点区别是他里面有个<parent>这你懂的
4.用法就是Hand完全由parent--》People控制,Hand属于Value而不是Entity实体,无OID