model.addAttribute("error",ErrorMessages.USERLOGINERROR);

return "redirect:/userlogin";

if(name.equals("false")){
System.out.println(ErrorMessages.USERLOGINERROR);
model.addAttribute("error",ErrorMessages.USERLOGINERROR);
return "redirect:/getuserloginpage";
}

<form:form action="userlogin" method="post" commandname="login">
<div align="center" style="color: red">${error}</div>
<div align="center" style="color: red">${thanks}</div>
...

@RequestMapping(value="/someURL", method=GET)
public String yourMethod(RedirectAttributes redirectAttributes)
{
   ...
   redirectAttributes.addAttribute("rd", "rdValue");
   redirectAttributes.addFlashAttribute("fa", faValue);
   return "redirect:/someOtherURL";
}