spring aop

   根据代理机制不同，有以下几种配置方式：





先定义一个DAO接口及实现类:





Java代码

public interface IUserDao {
public void insertUser(UserTable user);
}


实现类：





Java代码

public class UserDaoImpl extends HibernateDaoSupport implements IUserDao{
public void insertUser(UserTable user) {
getHibernateTemplate().saveOrUpdate(user);
}
}




第一种



    为每个bean设置一个代理，这种是根据具体需求来定，如要对具体到每个交易进行事务操作的话，这个方式是最合适的；



Java代码
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<!-- 每个bean都有一个代理 -->
<beans>
<!-- sessionFactory相当于spring datasource -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
        <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
    </bean> 
<!-- 定义事务管理器（声明式的事务） --> 
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
   
    <!-- 配置DAO -->
    <bean id="userDao" class="org.lgh.spring.transaction2.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
   
   
    <!-- 每个bean都有一个代理 <property name="target" ref="userDaoTarget" />  -->
    <bean id="userDaoProxy" 
        class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> 
           <!-- 配置事务管理器 --> 
           <property name="transactionManager" ref="transactionManager" />    
        <property name="target" ref="userDao" /> 
         <property name="proxyInterfaces" value="org.lgh.spring.transaction2.IUserDao" />
        <!-- 配置事务属性 --> 
        <property name="transactionAttributes"> 
            <props> 
                <prop key="*">PROPAGATION_REQUIRED</prop>
            </props> 
        </property> 
    </bean> 
</beans>

第二种:

     所有的bean共享一个代理


Java代码
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
  <!-- 所有的bean共享一个代理-->
<beans>
<bean id="sessionFactory" 
            class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
        <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
    </bean> 

    <!-- 定义事务管理器（声明式的事务） --> 
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <!-- 所有的bean共享一个代理/>  -->
    <bean id="transactionBase" 
            class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" 
            lazy-init="true" abstract="true"> 
        <!-- 配置事务管理器 --> 
        <property name="transactionManager" ref="transactionManager" /> 
        <!-- 配置事务属性 --> 
        <property name="transactionAttributes"> 
            <props> 
                <prop key="*">PROPAGATION_REQUIRED</prop> 
            </props> 
        </property> 
    </bean>   
  
    <!-- 配置DAO -->
    <bean id="userDao" class="org.lgh.spring.transaction3.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
     <!-- 所有的bean共享一个代理/>  -->
    <bean id="userDaoProxy" parent="transactionBase" > 
        <property name="target" ref="userDao" />  
    </bean>

</beans>










第三种:

   使用拦截器 来配置你的事务，这个主要是进行一些方法调用前后进行一些其他事件的处理，如进行权限检查等...

代码如下:



Java代码
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<!-- 使用拦截器 -->

<beans>
<bean id="sessionFactory" 
            class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
        <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
    </bean> 

    <!-- 定义事务管理器（声明式的事务） --> 
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
  
    <bean id="transactionInterceptor" 
        class="org.springframework.transaction.interceptor.TransactionInterceptor"> 
        <property name="transactionManager" ref="transactionManager" /> 
        <!-- 配置事务属性 --> 
        <property name="transactionAttributes"> 
            <props> 
                <prop key="*">PROPAGATION_REQUIRED</prop> 
            </props> 
        </property> 
    </bean>
    <bean name="logger" class="org.lgh.spring.transaction4.SpringAOPInterceptor">
   
    </bean>
   
   
    <bean id="logBeforeAdvice" class="com.spring.advices.LogBeforeAdvice">
</bean>

    <!-- 定义BeanNameAutoProxyCreator,该bean是个bean后处理器，无需被引用，因此没有id属性  
这个bean后处理器，根据事务拦截器为目标bean自动创建事务代理    -->
    <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> 
        <!-- 加上此句就不会抛出 $Proxy cannot be cast的异常啦-->
        <property name="proxyTargetClass">
          <value>true</value>
        </property> 
        <property name="beanNames"> 
            <list> 
            <!-- *Dao对应下面的userDao要对它进行拦截-->
                <value>userDao</value>
            </list> 
        </property> 
        <property name="interceptorNames"> 
            <list> 
                <value>transactionInterceptor</value> 
                <value>logBeforeAdvice</value>
            </list> 
        </property> 
    </bean> 
 
    <!-- 配置DAO -->
    <bean id="userDao" class="org.lgh.spring.transaction4.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
   
    <!-- 服务层 service-->
     <bean id="userService" class="org.lgh.spring.transaction4.UserServiceImpl">
        <property name="userDao" ref="userDao" />
    </bean>
</beans>





  










第四种：

  使用aop:config配置方式


Java代码
 

<?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/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">


<context:annotation-config />
    <context:component-scan base-package="org.lgh.spring.transaction5" />

    <bean id="sessionFactory" 
            class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
        <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
    </bean> 

    <!-- 定义事务管理器（声明式的事务） --> 
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED" />
        </tx:attributes>
    </tx:advice>
   
    <aop:config   proxy-target-class="true" >
   
        <aop:pointcut id="interceptorPointCuts"
            expression="execution(* org.lgh.spring.transaction5.*.*(..))" />
        <aop:advisor advice-ref="txAdvice"
            pointcut-ref="interceptorPointCuts" />       
    </aop:config>    
    
    <!-- 配置DAO -->
    <bean id="userDao" class="org.lgh.spring.transaction5.UserDaoImpl">

        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
   
    

   
</beans>












还有一种就是采用全注解方式：

    代码如下:

Java代码

<?xml version="1.0" encoding="UTF-8"?>

<!--全注解 -->
<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/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<context:annotation-config />
    <context:component-scan base-package="org.lgh.spring.transaction6" />

    <tx:annotation-driven proxy-target-class ="true" transaction-manager="transactionManager"/>

    <bean id="sessionFactory" 
            class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
        <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
    </bean> 

    <!-- 定义事务管理器（声明式的事务） --> 
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <!-- 配置DAO -->
    <bean id="userDao" class="org.lgh.spring.transaction6.UserDaoImpl">
   
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
   
</beans>