reloading the same page with message - spring mvc

[indu iyengar]

Hi
am using spring mvc with simple form controller . Here I need to reload the samePage along with some errormessage (like already student id already exists or password doesnot match) if Login fails.

protected ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response,Object command,BindException errors)throws Exception
	{
		StudentDetails student=(StudentDetails)command;
		String stdid = request.getParameter("stdid");
		//System.out.println("Entered in submit ");
		StudentDAO stdao = new StudentDAO();
		boolean flag = stdao.CheckStudentID(stdid);
		//System.out.println("flag SUBMIT "+flag);
		if(flag==true)
		{
			PrintWriter out = response.getWriter();
			//System.out.println("Student ID already Exists Select a different One ");
			ModelAndView mav = new ModelAndView("LoginForm");
			mav.addObject("message"," Student ID already exits Pls Select a different One"); ////not printing message..Just shows the LoginForm page that is the same page is reloading without message///////
			return mav;
		}
		return new ModelAndView(getSuccessView());
	}    

any help would be highly appreciated ...
thanks
indu

[Prasad Krishnegowda]

You can use errors.reject("errorcode","errormsg") combined with showForm(request,response,errors) for this purpose..