I think you can use wildcards in the action definition like this:

   <action-mappings>
        <action path="**/mystuff"
           type="test.action.TestAction"
           scope="request">
           <forward name="ok"
               path="/mystuff.jsp"/>
        </action>
   </action-mappings>

Then by using following code you can parse the prefixing 'folder'
created dynamically.

public ActionForward execute(ActionMapping map, ActionForm form,
HttpServletRequest req, HttpServletResponse resp) throws Exception {

//
// map.getPath() returns the path used to access the Action.
// e.g. http://localhost:8080/Context/foo/bar.do would return /foo/bar
//
   String path = map.getPath();
//Parse the prefixing "folder" from the path
//e.g. the "foo" from "/foo/bar/
   String folder = path.substring(1,path.indexOf("/",1));

   req.setAttribute("folder",folder);
   return map.findForward("ok");
}

- J-P