hibernate_一对一、一对多、多对多

一对一配置：

<class name="User" table="user">
        <id name="id" type="int" column="id">
            <generator class="native" />
        </id>
        <many-to-one name="address" column="addressId" cascade="save-update" />        
    </class>

<class name="Address" table="address" >
        <id name="addressId" type="int" column="addressId">
            <generator class="native" />
        </id>
        <property name="address" column="address"></property></class>

一对多配置：

<class name="User" table="user">
        <id name="id" type="int" column="id">
            <generator class="native" />
        </id>
        <set name="address" cascade="save-update">
            <!-- key为外键 -->
            <key column="userId" ></key>
            <one-to-many class="Address" />
        </set>
</class>

多对多：

<class name="User" table="user">
        <id name="id" type="int" column="id">
            <generator class="native" />
        </id>
        <set name="address" table="userAddress" cascade="save-update">
            <key column="userId" ></key>
            <many-to-many column="addressId" class="Address" ></many-to-many>
        </set>
</class>

<class name="Address" table="address" >
        <id name="addressId" type="int" column="addressId">
            <generator class="native" />
        </id>
        <property name="address" column="address"></property>
</class>