1. Order→Customer

<span style="font-family:FangSong_GB2312;font-size:18px;">                多端
		<hibernate-mapping>  
		    <!--类和表之间的映射-->
		    <class name="com.tgb.hibernate.Order" table="t_order">  
		        <id name="id">  
		            <generator class="native"/>  
		        </id>  
		        <property name="name"/>  		
		        <many-to-one name="customer" column="customerId"/>  
		    </class>  
		</hibernate-mapping>  
		  
		一端
		<hibernate-mapping>  
		    <class name="com.tgb.hibernate.Customer" table="t_customer">  
		        <id name="id">  
		            <generator class="native"/>  
		        </id>  
		        <property name="name"/>  
		    </class>  
		</hibernate-mapping>  
		</span>

    2. Customer→Order

<span style="font-family:FangSong_GB2312;font-size:18px;">                多端
		<hibernate-mapping>  
		    <class name="com.tgb.hibernate.Order" table="t_order">  
		        <id name="id">  
		            <generator class="native"/>  
		        </id>  
		        <property name="name"/>   
		    </class>  
		</hibernate-mapping>  
		  
		一端
		<hibernate-mapping>  
		    <class name="com.tgb.hibernate.Customer" table="t_group">  
		        <id name="id">  
		            <generator class="native"/>  
		        </id>  
		        <property name="name"/>  
		        <set name="orders" inverse="true" cascade="all">
		                <key column="customer_id" ></key>
		                <one-to-many class="com.tgb.hibernate.Order"/>
		        </set>
		    </class>  
		</hibernate-mapping>  <span style="background-color: rgb(255, 255, 255);">		</span></span>

    3. 双向关联

<span style="font-family:FangSong_GB2312;font-size:18px;">	多端
	<hibernate-mapping>  
	    <!--类和表之间的映射-->
	    <class name="com.tgb.hibernate.Order" table="t_order">  
	        <id name="id">  
	            <generator class="native"/>  
	        </id>  
	        <property name="name"/>  		
	        <many-to-one name="customer" column="customerId"/>  
	    </class>  
	</hibernate-mapping>  
	一端
	<hibernate-mapping>  
	    <class name="com.tgb.hibernate.Customer" table="t_group">  
	        <id name="id">  
	            <generator class="native"/>  
	        </id>  
	        <property name="name"/>  
	        <set name="orders" inverse="true" cascade="all">
	                <key column="customer_id" ></key>
	                <one-to-many class="com.tgb.hibernate.Order"/>
	        </set>
	    </class>  
	</hibernate-mapping>  </span>