hibernate关联映射

1-->n

<hibernate-mapping>
<class name="com.hibernate.bean.Customer" table="CUSTOMER">
<id name="customerId" type="java.lang.Integer">
<column name="CUSTOMER_ID" />
<generator class="native" />
</id>
<property name="customerName" type="java.lang.String">
<column name="CUSTOMER_NAME" />
</property>
</class>
</hibernate-mapping>

<hibernate-mapping package="com.hibernate.bean">
<class name="Order" table="tt_ORDER">
<id name="orderId" type="java.lang.Integer">
<column name="ORDER_ID" />
<generator class="native" />
</id>
<property name="orderName" type="java.lang.String">
<column name="ORDER_NAME" />
</property>
<many-to-one name="customer" class="Customer" column="CUSTOMER_ID"></many-to-one>
</class>
</hibernate-mapping>1<--->n
<hibernate-mapping package="com.hibernate.bean2">
<class name="Order" table="tt_ORDER">
<id name="orderId" type="java.lang.Integer">
<column name="ORDER_ID" />
<generator class="native" />
</id>
<property name="orderName" type="java.lang.String">
<column name="ORDER_NAME" />
</property>
<many-to-one name="customer" class="Customer" column="CUSTOMER_ID"></many-to-one>
</class>
</hibernate-mapping>

<hibernate-mapping package="com.hibernate.bean2">
<class name="Customer" table="CUSTOMER">
<id name="customerId" type="java.lang.Integer">
<column name="CUSTOMER_ID" />
<generator class="native" />
</id>
<property name="customerName" type="java.lang.String">
<column name="CUSTOMER_NAME" />
</property>
<!-- 级联删除 -->
<set name="orders" table="tt_ORDER" inverse="true" cascade="delete">
<key column="CUSTOMER_ID"></key>
<one-to-many class="Order"/>
</set>
</class>
</hibernate-mapping>1<--->1
<hibernate-mapping package="com.hibernate.bean">
<class name="Manager" table="MANAGERS">
<id name="mgrId" type="java.lang.Integer">
<column name="MGR_ID" />
<generator class="native" />
</id>
<property name="mgrName" type="java.lang.String">
<column name="MGR_NAME" />
</property>
<one-to-one name="department" class="Department" property-ref="manager"></one-to-one>
</class>
</hibernate-mapping>

<hibernate-mapping package="com.hibernate.bean">
<class name="Department" table="DEPARTMENTS">
<id name="deptId" type="java.lang.Integer">
<column name="dept_Id" />
<generator class="native" />
</id>
<property name="deptName" type="java.lang.String">
<column name="dept_name" />
</property>
<many-to-one name="manager" class="Manager" column="MGR_ID" unique="true" />
</class>
</hibernate-mapping>