Struts 2 action class not working

Question

I am using struts2 for developing a web application.
I have include the required jars for struts2 but when it is going to call the struts action class it is throwing 404 error.
There is no error on console and browser does not showing .action extension whitch it shows when struts.xml call an action class.
I am using jdk 1.6 and struts 2.0.
Am I missing any jar who is responsible for all this.

In jsp I am simply calling the function from
<s:form action = "Mergexmlaction" method = "post"/>

Here is my struts.xml and web.xml

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts> 
  <constant name="struts.multipart.maxSize" value="6000000000" /> 

  <package name="default" namespace="/jsp" extends="struts-default">
    <action name="Mergexmlaction" class="com.hm.merge.mergeaction.Mergexmlaction">
      <result name="success" >/jsp/Result.jsp</result>
      <result name="error" >/jsp/Browse_multiplexmlfiles.jsp</result> 
      <interceptor-ref name="fileUpload">
        <param name="maximumSize">600000000</param> 
      </interceptor-ref> 
    </action>
  </package>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="xml_file_merging" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 
  <display-name>xml_file_merging</display-name>
  <filter>
        <filter-name>struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.FilterDispatcher
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <welcome-file-list>
        <welcome-file>jsp/Browse_multiplexmlfiles.jsp</welcome-file>
    </welcome-file-list>
</web-app>

Answer 1

There are a few issues.

<package name="default" namespace="/jsp" extends="struts-default">

1) I'd recommend against having a namespace of "jsp", it doesn't make any sense. Namespaces should be something meaningful to the application and/or user.

  <action name="Mergexmlaction" class="com.hm.merge.mergeaction.Mergexmlaction">

2) Don't name an action with "action", there will either be a .action extension, or no extension at all. Either way, there's no reason to duplicate "action" in the first case, and no reason to use "action" if there's no extension. Just "mergexml", "mergeXml", etc.

    <result name="success" >/jsp/Result.jsp</result>

3) I recommend putting your JSP pages under WEB-INF to avoid direct client access.

    <interceptor-ref name="fileUpload">

4) Once you declare any interceptors, you must declare all interceptors. This action has only a single interceptor running. It's possible this is okay, but it's almost never the right thing to do.

<welcome-file>jsp/Browse_multiplexmlfiles.jsp</welcome-file>

5) And this is the ultimate issue, depending on how you're accessing the application. You show the welcome file as being a JSP page, which is presumably using S2 tags. This won't work: the tags depend on their being a complete S2 request, a value stack, etc.

All access to an S2 app should take place through an S2 action, not a JSP. If you look at the rendered HTML for the directly-accessed JSP you'll see neither namespace nor action extension rendered.

Answer 2

The namespace attribute of package element is optional and if it is not present, the default value "/" is assumed. If the namespace attribute has a non-default value, the namespace must be added to the URI that invokes the actions in the package.

For example, the URI for invoking an action in a package with a default namespace is this:

/context/actionName

To invoke an action in a package with a non-default namespace, you need this URI:

/context/namespace/actionName

Answer 3

an error 404 is a bad link. means you just are calling a link that doesnt exist. Check your mapping in your struts config file and make sure you use the correct url.