诡异的InternalResourceViewResolver

现象：

<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean> 

 

<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".html" />
</beans:bean>

   第一种可以正常工作，第二种不行，当然了/WEB-INF/views里面 jsp和html结尾的都可以。

  

WARN : org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/myapp/WEB-INF/views/home.html] in DispatcherServlet with name 'appServlet'

    

   错误的原因就是html页面被加上了/myapp前缀，myapp为我的工程名称。

   分析，从spring的InternalResourceViewResolver入手：

   

@Override
    protected AbstractUrlBasedView buildView(String viewName) throws Exception {
         InternalResourceView view = (InternalResourceView) super .buildView(viewName);
          if (this .alwaysInclude != null) {
             view.setAlwaysInclude( this.alwaysInclude );
         }
          if (this .exposeContextBeansAsAttributes != null) {
             view.setExposeContextBeansAsAttributes( this.exposeContextBeansAsAttributes );
         }
          if (this .exposedContextBeanNames != null) {
             view.setExposedContextBeanNames( this.exposedContextBeanNames );
         }
         view.setPreventDispatchLoop( true);
          return view;
    }

    

      从代码来看这个地方只是构建了一个view，应该是没有问题的，最终我跟踪代码到InternalResourceView的renderMergedOutputModel函数。

    

// Determine the path for the request dispatcher.
         String dispatcherPath = prepareForRendering(requestToExpose, response);

          // Obtain a RequestDispatcher for the target resource (typically a JSP).
         RequestDispatcher rd = getRequestDispatcher(requestToExpose, dispatcherPath);
          if (rd == null) {
              throw new ServletException("Could not get RequestDispatcher for [" + getUrl() +
                       "]: Check that the corresponding file exists within your web application archive!");
         }

          // If already included or response already committed, perform include, else forward.
          if (useInclude(requestToExpose, response)) {
             response.setContentType(getContentType());
              if (logger .isDebugEnabled()) {
                  logger.debug("Including resource [" + getUrl() + "] in InternalResourceView '" + getBeanName() + "'" );
             }
             rd.include(requestToExpose, response);
         }

          else {
              // Note: The forwarded resource is supposed to determine the content type itself.
             exposeForwardRequestAttributes(requestToExpose);
              if (logger .isDebugEnabled()) {
                  logger.debug("Forwarding to resource [" + getUrl() + "] in InternalResourceView '" + getBeanName() + "'");
             }
             rd.forward(requestToExpose, response);
         }

     从这段代码来看，prepareForRendering这个函数是来准备url的，也就是刚才的InternalResourceViewRoslver的解析的结果，从调试来看，这两个的配置的返回的路径一致。那问题应该出在RequestDispatcher的fowward函数了，从这个地方来看，又回到了servlet里面，然后我写了个小例子。

     

    从小例子来看是完全一样的。

    

 10:55:58.283 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Added model object 'org.springframework.validation.BindingResult.user' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'index'
10:55:58.283 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Added model object 'user' of type [microshield.com.cn.radius.admin.model.User] to request in view with name 'index'
10:55:58.284 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/pages/index.jsp] in InternalResourceView 'index'
10:56:11.719 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request

10:48:22.161 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/pages/index.html] in InternalResourceView 'index'
10:48:22.178 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'Spring MVC Dispatcher Servlet' processing GET request for [/microshield-radius/WEB-INF/pages/index.html]
10:48:22.180 [http-bio-8080-exec-10] DEBUG o.s.w.s.m.a.DefaultAnnotationHandlerMapping - Looking for URL mappings in application context: WebApplicationContext for namespace 'Spring MVC Dispatcher Servlet-servlet': startup date [Mon Sep 15 10:47:54 CST 2014]; parent: Root WebApplicationContext
10:48:22.182 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'userAction'

   

 

 

      从调用的轨迹来看，jsp file直接在response流里面进行了处理，但是html file又发起了一次请求。

     但是我在普通的servlet里面运行工程是可以的，由于没有时间下载tomcat的源码进行调试，没有看到具体的代码走的分支，有熟悉的给帮我解答下。

评论

6 楼 mingnianshishenian 2015-07-20  

我也遇到了这个问题,这个问题的原因是web.xml里<servlet-mapping>拦截的*.html和你的html的扩展名一样了!

<servlet-mapping>
	<servlet-name>action</servlet-name>
	<url-pattern>
引用
[b][color=red]*.html[/color][/b]
</url-pattern>
</servlet-mapping>

这个名字和你的html文件的扩展名不能一样,要不会出问题!

5 楼 asialee 2014-09-17  

10:55:58.283 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Added model object 'org.springframework.validation.BindingResult.user' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'index' 
10:55:58.283 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Added model object 'user' of type [microshield.com.cn.radius.admin.model.User] to request in view with name 'index' 
10:55:58.284 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/pages/index.jsp] in InternalResourceView 'index' 
10:56:11.719 [http-bio-8080-exec-4] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request 
 
10:48:22.161 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/pages/index.html] in InternalResourceView 'index' 
10:48:22.178 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'Spring MVC Dispatcher Servlet' processing GET request for [<span style="color: #ff0000;">/microshield-radius</span>/WEB-INF/pages/index.html] 
10:48:22.180 [http-bio-8080-exec-10] DEBUG o.s.w.s.m.a.DefaultAnnotationHandlerMapping - Looking for URL mappings in application context: WebApplicationContext for namespace 'Spring MVC Dispatcher Servlet-servlet': startup date [Mon Sep 15 10:47:54 CST 2014]; parent: Root WebApplicationContext 
10:48:22.182 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'userAction' 

4 楼 asialee 2014-09-17  

zhaobohao 写道

这是两个问题，兄弟，你的方向错了.
首先有一个问题要明确，jsp,html,php,.do这些个后缀文件用什么去解析，是在web容器里配置的，和InternalResourceViewResolver没有一点关系。
你现在的问题是要去web容器里配置　.html的文件用jsp的解析器去解析。

这个我是知道的，但是我现在的问题是InternalResourceViewResolver为什么只能转到jsp或者servlet里面去，普通的html为什么就行，会添加一个contextPath，这个是我比较好奇的。

3 楼 asialee 2014-09-17  

zhaobohao 写道

http://haohaoxuexi.iteye.com/blog/1770554　可以看一个这个对InternalResourceViewResolver的解释，基本和你代码跟踪的结果一样。

嗯，路径相同，但是没有解决这个问题。

2 楼 zhaobohao 2014-09-17  

http://haohaoxuexi.iteye.com/blog/1770554　可以看一个这个对InternalResourceViewResolver的解释，基本和你代码跟踪的结果一样。

1 楼 zhaobohao 2014-09-17  

这是两个问题，兄弟，你的方向错了.
首先有一个问题要明确，jsp,html,php,.do这些个后缀文件用什么去解析，是在web容器里配置的，和InternalResourceViewResolver没有一点关系。
你现在的问题是要去web容器里配置　.html的文件用jsp的解析器去解析。