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Spring MVC: How to resolve the path to subdirectories of the root 'JSP' folder in a web application

问题描述:

What is a simple way to resolve the path to a JSP file that is not located in the root JSP directory of a web application using SpringMVCs viewResolvers? For example, suppose we have the following web application structure:

web-app

|-WEB-INF

|-jsp

|-secure

|-admin.jsp

|-admin2.jsp

index.jsp

login.jsp

I would like to use some out-of-the-box components to resolve the JSP files within the jsp root folder and the secure subdirectory. I have a *-servlet.xml file that defines:

an out-of-the-box, InternalResourceViewResolver:

 <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>

<property name="prefix" value="/WEB-INF/jsp/"></property>

<property name="suffix" value=".jsp"></property>

</bean>

a handler mapping:

<bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">

<property name="mappings">

<props>

<prop key="/index.htm">urlFilenameViewController</prop>

<prop key="/login.htm">urlFilenameViewController</prop>

<prop key="/secure/**">urlFilenameViewController</prop>

</props>

</property>

</bean>

an out-of-the-box UrlFilenameViewController controller:

<bean id="urlFilenameViewController" class="org.springframework.web.servlet.mvc.UrlFilenameViewController">

</bean>

The problem I have is that requests to the JSPs in the secure directory cannot be resolved, as the jspViewResolver only has a prefix defined as /jsp/ and not /jsp/secure/.

Is there a way to handle subdirectories like this? I would prefer to keep this structure because I'm also trying to make use of Spring Security and having all secure pages in a subdirectory is a nice way to do this.

There's probably a simple way to acheive this but I'm new to Spring and the Spring MVC framework so any pointers would be appreciated.

网友答案:

I haven't been able to discover the exact solution to the question I asked but I do have a workaround that suits my particular requirements. The problem seems to lie in the hander mapping. If specified as in the example in the post, any requests to pages in the secure folder result in a failed attempt to locate the actual JSP file in the /WEB-INF/JSP/ folder when of course the actual file is located in /WEB-INF/jsp/secure/.

However, if specified like so:

 <bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
  <property name="mappings">
   <props>
    <prop key="/login.htm">loginFormController</prop>
    <prop key="**/*.htm">urlFilenameViewController</prop>
   </props>
  </property>
 </bean>

Then all the pages are resolved correctly. A request to /login.html will go to a specific form controller but requests to all other pages, no matter whether they are in the root JSP directory or a sub directory will be found. For me this is fine because what I was really looking for was a way to avoid specifiying a controller for every page in the application (hmmm... perhaps I should have made that clear in the first post - and perhaps there are better ways to do this anyway(?)) . The **/*.htm acts as a catch-all case and any pages that I want handled by a different controller can be specified explicitly above this property, as demonstrated by /login.htm.

网友答案:

Try with UrlFilenameViewController or return new ModelAndView("secure/login");

网友答案:

You can try giving names of the views in the Controller like

<property name="formView" value="secure/admin"/>
<property name="successView" value="secure/admin2"/>

having prefix and suffix mapped as below

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

This will eventually map to /WEB-INF/jsp/secure/admin.jsp and /WEB-INF/jsp/secure/admin2.jsp

网友答案:

You need to set the alwaysUseFullPath property in in the Handler to true:

<bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    ...
    <property name="alwaysUseFullPath" value="true" />
</bean>

This will force the handler to use the '/secure/' part of the URI and then the resolver will include it when looking for a JSP in WEB-INF/jsp.

网友答案:

It seems like this ought to work, according to the docs:

http://static.springsource.org/spring/docs/3.0.x/api/org/springframework/web/servlet/mvc/UrlFilenameViewController.html

The configs you have shown seem to match up with the examples in the doc. If your Spring MVC dispatcher servlet is mapped to "/" then requests to "{context}/secure/whatever.jsp" should get translated to view name "secure/whatever". Maybe it has something to do with the "**" wildcard? Or maybe some of your other configs are not right? Can you include the portion of your web.xml where you set up your Spring dispatcher servlet and also include the full paths you're requesting in your browser?

Another way to find the problem would be to to download the Spring MVC source code and include it in your app, then use a debugger to see exactly what is going on in both the SimpleUrlHandlerMapping and UrlFilenameViewController beans to try to pinpoint the error. You should be able to pretty quickly determine where things are going wrong that way.

网友答案:

You need to set the property as follows:

<property name="prefix" value="/WEB-INF/jsp/"/>

and then you can access the URI secure/admin1.jsp

网友答案:

All sub folders can be accessed by using wild card in prefix

From controller you can simply return jsp name as string and the jsp will be displayed even if it is under sub folders of /WEB-INF/jsp/ like /WEB-INF/jsp/abc

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