in my web app i'm using struts as controller and i want to display errors gentrated whiel executing the struts file to same input form.
E.g. login i handled the errors if the fields are blank even these are displayed ( using bean validate method). now if the username and password combination is wrong then?? how to show that using struts
here have look at my action class
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package controller;
import formbeans.signin;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.user;
import model.userDAO;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
 * @author Arvind
public class adminlogin extends org.apache.struts.action.Action {
    /* forward name="success" path="" */
    private static final String SUCCESS = "success";
     * This is the action called from the Struts framework.
     * @param mapping The ActionMapping used to select this instance.
     * @param form The optional ActionForm bean for this request.
     * @param request The HTTP Request we are processing.
     * @param response The HTTP Response we are processing.
     * @throws java.lang.Exception
     * @return
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        ActionErrors errors = new ActionErrors();
        HttpSession session = request.getSession();
        saveErrors(request, errors);
        signin data = (signin) form;
        userDAO admin = new userDAO();
        try {
            user u = admin.admin(data.getUsername(), data.getPassword());
            if (u.getUsername().equals(data.getUsername()) && u.getPassword().equals(data.getPassword())) {
                System.out.println("user valid");
                session.setAttribute("username", u.getUsername());
                return mapping.findForward(SUCCESS);
            } else {
                System.out.println("user valid");
                throw new RuntimeException();
        } catch (Exception e) {
            errors.add("invalid", new ActionMessage("error.record"));<-----this error is not diplayed in the form,when forward happens
   return mapping.findForward("error");
even server log is empty.
is anything wrong here ?? why it is not shown there??
do help