Give Url to ur servlet through @WebServlet(name = "Controller", urlPatterns = {"/Controller"})



@WebServlet(name = "Controller", urlPatterns = {"/Controller"})
public class Controller extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
{
}
 protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }
}

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