spring原拦截器配置与新命名空间mvc:interceptors配置拦截器对照与注意事项

原先,我们是这么配置拦截器的

   <bean id="openSessionInViewInterceptor"class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
      <property name="sessionFactory" ref="sessionFactory" />
   </bean>
 
    <beanclass="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
       <property name="interceptors">
         <list>
         <ref bean="openSessionInViewInterceptor"/>
         <bean class="com.jumbo.interceptor.MetaInfoInterceptor"/>
         </list>
       </property>
  </bean>

原配置方式结合新命名空间mvc:interceptors配置方式：

<mvc:annotation-driven />
 
<!-- *************openSessionInViewInterceptor  *************-->
   <bean id="openSessionInViewInterceptor"class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
      <property name="sessionFactory" ref="sessionFactory" />
   </bean> 
 
   <!--
      **************interceptors **************************
   -->
   <beanclass="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
      <property name="interceptors">
        <list>
           <ref bean="openSessionInViewInterceptor" />
        </list>
      </property>
   </bean>
 
   <mvc:interceptors>
      <mvc:interceptor>
        <mvc:mapping path="/**/*.htm" />
        <bean id="metaInfoInterceptor" class="com.jumbo.web.interceptor.MetaInfoInterceptor"/>
      </mvc:interceptor>
   </mvc:interceptors>

这样对吗？？？

因为<mvc:annotation-driven  />会自己主动注冊DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter两个实例,

<span style="color:#FF6666;"><beanclass="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></span>

这儿又注冊一次导致导致没有openSessionInViewInterceptor,产生了no session的 异常

所以：放弃原拦截器配置方式拥抱新的方法：

    <mvc:annotation-driven />  
     <mvc:interceptors>  
        <!--*************openSessionInViewInterceptor *************   -->  
        <bean id="openSessionInViewInterceptor"class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">  
          <property name="sessionFactory" ref="sessionFactory" />  
        </bean>  
      
        <mvc:interceptor>  
          <mvc:mapping path="/**/*.htm" />  
          <bean id="metaInfoInterceptor" class="com.jumbo.web.interceptor.MetaInfoInterceptor"/>  
        </mvc:interceptor>  
      
     </mvc:interceptors>