<mvc:annotation-driven>和DefaultAnnotationHandlerMapping 配置教训

前一阵子,负责公司用户中心项目的开发,发现了spring新版本有很好用的新的命名空间 <mvc:>,可以简化<bean>的配置

 

而且,自从spring 3.0.4之后,对于 restful的支持更加完美

 

so,尝试着,在 mvc的配置文件中,使用mvc的命名空间

 

 

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>

 

 

看到新命名空间mvc:interceptors简洁,我们进行修改, 改造的过程中又想保留原来的配置interceptors的习惯,以留作历史技术积累习惯

 

产生了我这样的配置

 

 

 

<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>

 

 

 

 

测试了下 metaInfoInterceptor,很完美,程序很正常

 

 

 

杯具的事情来了

 

今天,我在controller 里面写了这样的代码

 

 

...
      MemberRank memberRank = memberRankManager.findMemberRank_byTotalConsumption(memberId);
      model.addAttribute("rankCode", memberRank.getRank().getCode());
...

 

 

 

死活给我出现  could not initialize proxy - no Session

 

我就纳闷儿了,心想,哥OpenSessionInView自从 spring+hibernate 就一直用,都好几年了,写过这样的代码没有一千也有八百,怎么回事?

 

没办法,只有去 openSessionInViewInterceptor 加个断点,看看我的代码是否走过openSessionInViewInterceptor,

一路debug走下去,没有经过openSessionInViewInterceptor

 

奇怪了,那么去 DefaultAnnotationHandlerMapping 加个断点,看看初始化的时候,我的openSessionInViewInterceptor 到底设置了没有,

嘿,不看不知道,一看~真奇妙

 

开始的时候, interceptors 一直是null,突然又有值了,里面有我们的需要的小小的openSessionInViewInterceptor

 

一看log 

 

 

22:06:45,511 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/api.htm] onto handler 'apiController'
22:06:45,697 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/aboutus.htm] onto handler 'helpCenterController'
22:06:45,697 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/contactus.htm] onto handler 'helpCenterController'
22:06:45,698 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/disclaimer.htm] onto handler 'helpCenterController'
22:06:45,698 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/privacy.htm] onto handler 'helpCenterController'
22:06:45,698 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/sitemap.htm] onto handler 'helpCenterController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/errors/errors.htm] onto handler 'mainController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/index.htm] onto handler 'mainController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/bulletin/show.htm] onto handler 'mainController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/errors/404.htm] onto handler 'mainController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/admin/refreshmeta.htm] onto handler 'mainController'
22:06:45,866 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/memguide/showguide.htm] onto handler 'mainController'
22:06:46,049 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/memberpoint/show.htm] onto handler 'memberPointController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/makedefaultaddress.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberaddressdelete.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberview.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberupdate.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressList.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressadd.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressView.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressUpdate.htm] onto handler 'memberController'
22:06:46,210 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberrankview.htm] onto handler 'memberController'
22:06:46,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/qq.htm] onto handler 'oauthController'
22:06:46,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/qqcallback.htm] onto handler 'oauthController'
22:06:46,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/taobao.htm] onto handler 'oauthController'
22:06:46,370 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/taobaocallback.htm] onto handler 'oauthController'
22:06:46,537 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/myorderinfo.htm] onto handler 'orderDetailController'
22:06:46,537 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/myorderdetail.htm] onto handler 'orderDetailController'
22:06:46,537 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/synchronizationview.htm] onto handler 'orderDetailController'
22:06:46,537 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/synchronizationorder.htm] onto handler 'orderDetailController'
22:06:46,697 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/validateEmail.json] onto handler 'mailSubscriptionController'
22:06:52,269 INFO  [SimpleUrlHandlerMapping] Mapped URL path [/images/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'
22:06:52,270 INFO  [SimpleUrlHandlerMapping] Mapped URL path [/css/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#1'
22:06:52,271 INFO  [SimpleUrlHandlerMapping] Mapped URL path [/scripts/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#2'
22:06:52,937 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/api.htm] onto handler 'apiController'
22:06:53,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/aboutus.htm] onto handler 'helpCenterController'
22:06:53,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/contactus.htm] onto handler 'helpCenterController'
22:06:53,369 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/disclaimer.htm] onto handler 'helpCenterController'
22:06:53,370 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/privacy.htm] onto handler 'helpCenterController'
22:06:53,370 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/helpcenter/sitemap.htm] onto handler 'helpCenterController'
22:06:53,561 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/errors/errors.htm] onto handler 'mainController'
22:06:53,561 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/index.htm] onto handler 'mainController'
22:06:53,561 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/bulletin/show.htm] onto handler 'mainController'
22:06:53,561 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/errors/404.htm] onto handler 'mainController'
22:06:53,561 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/admin/refreshmeta.htm] onto handler 'mainController'
22:06:53,562 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/memguide/showguide.htm] onto handler 'mainController'
22:06:53,737 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/memberpoint/show.htm] onto handler 'memberPointController'
22:06:53,913 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/makedefaultaddress.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberaddressdelete.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberview.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberupdate.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressList.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressadd.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressView.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/addressUpdate.htm] onto handler 'memberController'
22:06:53,914 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/member/memberrankview.htm] onto handler 'memberController'
22:06:54,097 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/qq.htm] onto handler 'oauthController'
22:06:54,097 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/qqcallback.htm] onto handler 'oauthController'
22:06:54,097 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/taobao.htm] onto handler 'oauthController'
22:06:54,097 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/oauth/taobaocallback.htm] onto handler 'oauthController'
22:06:54,273 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/myorderinfo.htm] onto handler 'orderDetailController'
22:06:54,273 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/myorderdetail.htm] onto handler 'orderDetailController'
22:06:54,273 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/synchronizationview.htm] onto handler 'orderDetailController'
22:06:54,273 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/order/synchronizationorder.htm] onto handler 'orderDetailController'
22:06:54,457 INFO  [DefaultAnnotationHandlerMapping] Mapped URL path [/validateEmail.json] onto handler 'mailSubscriptionController'
22:07:00,366 INFO  [AbstractTilesApplicationContextFactory] Initializing Tiles2 application context. . .
22:07:00,366 INFO  [AbstractTilesApplicationContextFactory] Finished initializing Tiles2 application context.
22:07:00,632 INFO  [TilesAccess] Publishing TilesContext for context: org.springframework.web.servlet.view.tiles2.SpringTilesApplicationContextFactory$SpringWildcardServletTilesApplicationContext
22:07:00,648 INFO  [XmlBeanDefinitionReader] Loading XML bean definitions from ServletContext resource [/WEB-INF/views.xml]
22:07:00,676 INFO  [GenericWebApplicationContext] Refreshing org.springframework.web.context.support.GenericWebApplicationContext@13bef50: startup date [Mon Nov 21 22:07:00 CST 2011]; parent: WebApplicationContext for namespace 'spring-servlet'
22:07:00,688 INFO  [DefaultListableBeanFactory] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@9cf542: defining beans [json]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@1654
22:07:00,737 INFO  [DispatcherServlet] FrameworkServlet 'spring': initialization completed in 19213 ms

 

 

 

 

DefaultAnnotationHandlerMapping 被启动了两遍,controller 被Mapped了两遍

 

mvc:annotation-driven 会自动注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter两个实例,

根据断点,这个时候启动的 DefaultAnnotationHandlerMapping,我的 interceptors 没有起作用,仅在我再次配置的 DefaultAnnotationHandlerMapping才起了作用

 

而我controller 的代码,恰恰是使用了 第一次启动的 DefaultAnnotationHandlerMapping ,导致没有openSessionInViewInterceptor,产生了no session的 异常

 

将配置改成如下

 

 

 

  <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>

 

 

 

这下完美了, openSessionInViewInterceptor 配置成功,code 成功取到值,牺牲了我的"历史技术积累"了

 

一次失败的经历,与君共勉

 

查询资料:http://forum.springsource.org/showthread.php?81238-Conflict-between-lt-mvc-annotation-driven-gt-and-DefaultAnnotationHandlerMapping

评论

3 楼 lijunwyf 2015-06-01  

是不是<mvc:annotation-driven />接下来的<mvc:interceptors> 还是可以正常拦截的？多谢

2 楼 lijunwyf 2015-06-01  

大牛，你的最后一段代码，<mvc:annotation-driven /> 中默认添加了DefaultAnnotationHandlerMapping，

<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>

这一段拦截不到吧？

1 楼 宋建勇 2013-09-09  

怒赞！有分析问题过程，nice！