SPRINGMVC dispatcherservlet interception and access to static resources HTML, JS, CSS 404 issues

Source: Internet
Author: User

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Previously used *.do to do, but the *.do is very ugly, so instead of "/" To configure:

12345678910 <servlet>     <servlet-name>dispatcherServlet</servlet-name>     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping>     <servlet-name>dispatcherServlet</servlet-name>     <url-pattern>/</url-pattern> </servlet-mapping>

But the problem is how to access static files, such as Jpg,js,css?

If your dispatcherservlet blocks a URL with a suffix such as "*.do", there is no problem accessing static resources.

If your dispatcherservlet intercepts "/", in order to implement the rest style, all requests are intercepted, and access to static files such as *.js,*.jpg is intercepted.

We have to solve this problem.

Purpose: The static file can be accessed normally, and no static file 404 can be found.

Scenario One: Activate Tomcat's defaultservlet to handle static files

123456789101112 <servlet-mapping>      <servlet-name>default</servlet-name    <url-pattern>*.jpg</url-pattern>    </servlet-mapping>   <servlet-mapping>          <servlet-name>default</servlet-name>       <url-pattern>*.js</url-pattern>   </servlet-mapping>   <servlet-mapping>           <servlet-name>default</servlet-name>          <url-pattern>*.css</url-pattern>     </servlet-mapping>

  

To write in front of the Dispatcherservlet, let Defaultservlet first intercept the request, so the request will not enter spring, I think the performance is the best.

Tomcat, Jetty, JBoss, and GlassFish the name of the default servlet that comes with--"default"
Google App Engine comes with the name of the default servlet-"_ah_default"
The name of the default servlet that Resin comes with--"resin-file"
The name of the default servlet that WebLogic comes with--"Fileservlet"
The name of the default servlet that comes with WebSphere--"Simplefileservlet"

There are two other solutions, you can see: http://blog.csdn.net/this_super/article/details/7884383

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Spring MVC static Resource 404 issue

When the Web. XML configuration servlet-mapping, if Url-pattern is set to "/" (below), many people will encounter import js,css, pictures and other static resources appear in the Firefox Debug window will report 404 errors, And you don't really have access to those resources.

<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

Baidu for a long time, there are roughly 3 ways: But I still do not solve 404 problems, and then Google a bit, found a key place (in Baidu Search is not mentioned in a place, so that the more critical:)), is in the JSP page to import static resources when you need to use <C: url> tags.

For example:

<%@ taglib prefix= "C" uri= "Http://java.sun.com/jsp/jstl/core"%>

<script type= "Text/javascript" src= ' <c:url value= '/js/jquery.js ' ></c:url> ' ></script>

The value in the C:url here also requires special attention to the place, see the following 3 ways to specify:

Method 1. Modify the Web. xml file to increase URL mappings to static resources

Such as:

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>

When the configuration is added to Web. XML, these static resources can be referenced in the JSP page, but need to be <c:url value= "";

Such as:

<%@ taglib prefix= "C" uri= "Http://java.sun.com/jsp/jstl/core"%>

<script type= "Text/javascript" src= ' <c:url value= '/js/jquery.js ' ></c:url> ' ></script>

Here also need to explain is: This method can not access the static resources under the Web-inf directory, that is, the JS directory must be the Web root (may be webapp,webcontent, etc.) directory, otherwise it can not be referenced;

If placed in the Web-inf directory, even if you use <c:url value= "/web-inf/js/jquery.js" > There will also be 404 errors.

Baidu found: The following container of the default servlet name, but also mentioned that the static resource servlet mapping needs to be written in front of Dispatcherservlet I have tested it in jboss-eap-5.1, it has nothing to do with it, so it may be a container or version of the relationship.

Tomcat, Jetty, JBoss, and GlassFish the default servlet name-"Default"
Google App Engine Default servlet name-"_ah_default"
Resin default servlet name-"Resin-file"
WebLogic default servlet name-"Fileservlet"
The name of the WebSphere default servlet-"Simplefileservlet"

Method 2: Add the spring Configuration to the corresponding-servlet.xml <mvc:default-serlvet-handler>

Such as:

<mvc:default-servlet-handler/>

This method only needs to add a line of code, the JSP page is referenced in the same way as Method 1, also cannot reference the resources under Web-inf.

Method 3. Using the new features of spring 3.0.4, add the configuration in the appropriate-servlet.xml <mvc:resource>

Such as:

3.1 <mvc:resources location= "/js/" mapping= "/js/**"/>

Or

3.2 <mvc:resources location= "/web-inf/js/" mapping= "/js/**"/>

This method I wrote two configuration, different place is just the value of location, one is "/js/", One is "/web-inf/js/", both can, according to your own directory structure to refer to. This means that you can refer to static resources in the Web-inf directory using this method, and the value of the mapping property here uses the Ant wildcard method, "/js/**" (two "*") refers to the directory represented by the value of the location and all subdirectories However, it is important to note that when referencing in a JSP page:

<c:url value= "/js/jquery.js" > value must be similar to the value of the mapping property, if it is a 3.1-way configuration, the reference is under the Web root directory js/ Jquery.js, if it is a 3.2-way configuration, it refers to the Web root directory under Web-inf/js/jquery.js;

<c:url value= "/js/ui/jquery-ui.js" > references the location directory under the subdirectory UI under Jquery-ui.js.

SPRINGMVC dispatcherservlet interception and access to static resources HTML, JS, CSS 404 issues

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