hibernate处理懒加载实例

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.sina.domain">
<class name="Users" table="users" lazy="false">
<id name="userid" type="java.lang.Integer">
<generator class="increment">
</generator>
</id>
<property name="name" type="java.lang.String">
<column name="name" length="64"/>
</property>
<property name="userpwd" type="java.lang.String">
<column name="userpwd" length="64"/>
</property>
<!-- getMessages属性 -->
<!-- 
<list name="sendMessages">
<list-index column=""/>
<key column="getter_id" />
<one-to-many class="Message"/>
</list>-->
<set name="sendMessages"  lazy="false>
<key column="sender_id" />
<one-to-many class="Message"/>
</set>
<set name="getMessages" lazy="false><!--缺点：但会增加很多select 语句-->
<key  column="getter_id" />
<one-to-many class="Message"/>
</set>
</class>
</hibernate-mapping>