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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/s ... ing-context-2.5.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

<!-- 把包含相同的配置信息的内容提取一个公共配置中，abstract要设为true -->
<bean id="publicFactory" abstract="true">
  <property name="sessionFactory" ref="myFactory"/>
</bean>

<!-- 手写实现类l配置-->
<!--
<bean id="Userdao" class="com.zhanglang.dao.impl.UserDAOImpl" parent="publicFactory"/>
-->

  <!-- 基于代理的泛型DAO实现 -->
<!-- 使用Spring的代理支持org.springframework.aop.framework.ProxyFactoryBean来创建一个UserDao接口的代理对象 -->
<bean id="userDao" class="org.springframework.aop.framework.ProxyFactoryBean">
  <property name="proxyInterfaces">
   <list>
    <value>com.zhanglang.dao.UserDao</value>
   </list>
  </property>
  <property name="target">
   <bean class="com.zhanglang.dao.impl.GenericDaoImpl" parent="publicFactory">
    <constructor-arg value="com.zhanglang.domain.User"></constructor-arg>
   </bean>
  </property>
</bean>

<!-- 把泛型DAO中的公共内容抽取到配置模板 -->

<!--如:-->

<bean id="abstractDao" class="org.springframework.aop.framework.ProxyFactoryBean" abstract="true">
   </bean>
   <bean  id="targetDaoBase" class="com.zhanglang.dao.impl.GenericDaoImpl" parent="publicFactory" abstract="true">
  </bean>

<!--此时代码可以简化成如下:-->

<!--   

<bean id="user1Dao" parent="abstractDao">
  <property name="proxyInterfaces">
   <list>
    <value>com.zhanglang.dao.UserDao</value>
   </list>
  </property>
  <property name="target">
   <bean  parent="targetDaoBase">
    <constructor-arg value="com.zhanglang.domain.User"></constructor-arg>
   </bean>
  </property>
</bean>

-->

</beans>