How to find out the location of the file in Struts?

I want to know that how to find out the location of a file in Struts. Where the files would be situated Here is some part of program:

<filter-mapping>
    <filter-name>LoginFilte开发者_StackOverflow中文版r</filter-name>
    <url-pattern>*.do</url-pattern>
 </filter-mapping>

 <servlet>
  <servlet-name>action</servlet-name>
  <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
  <init-param>
   <param-name>config</param-name>
   <param-value>/WEB-INF/struts-config.xml</param-value>
   </init-param>
   <load-on-startup>2</load-on-startup>
 </servlet>

I know that .do would be the extension of any file in the project but I am not getting its location. I don't know anything about struts.

Thanks in advance

Your .do is your URL pattern as (@Jigar Joshi mentioned) to see where it's mapped you will have to look at your URL on your browser:

Supposed your have http://localhost:8080/myapp/login.do, then the .do is seeing by your web container and it calls your Struts Servlet org.apache.struts.action.ActionServlet.

The Struts ActionServlet will then see your relative path /login (see how I've ignored the .do) and see whether it's mapped on your config file (in your case /WEB-INF/struts-config.xml).

From there, Struts ActionServlet check if there's an action path that matches your relative path, something like this:

<action path="/login" type="com.myapp.action.LoginAction" name="LoginForm" scope="request">

</action>

If that <action> is found, Struts will call com.myapp.action.LoginAction class and call the execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception method (if the class is just a simple Action class).

I hope this helps.

Inside your <action> element you might find another element called <forward>, example:

<forward name="FHome" path="/content/jsp/home.jsp" />

The forward name attribute is basically what your Struts Action calls when it returns an ActionForward, a code like this:

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
     return mapping.findForward("FHome");
}

Bear in mind that a forward inside an action element in struts-config.xml is called a local forward. A Global Forward sits outside the action element.

The path of the forward element is the relative path of the jsp page that Struts has to call (and the web/servlet container) to render.

Hope this clears things out for you.

I know that .do would be the extension of any file in the projec

No , .do would be the URL pattern.

Whenever you hit /yourapp/login.do particular action is supposed to be executed in struts and that is mapped in struts-config.xml