问POST和GET用于相同的URL - Controller - Spring

EN

@Controller
public class HelloWorldController {

    @RequestMapping("/hello.html")
    public ModelAndView helloWorld() {

        String message = "Hello World, Spring 3.0!";
        return new ModelAndView("hello", "message", message);
    }

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String viewLogin(Map<String, Object> model) {
        User user = new User();
        model.put("userForm", user);
        return "LoginForm";
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String doLogin(@Valid  @ModelAttribute("userForm")  User userForm,
            BindingResult result, Map<String, Object> model) {

        if (result.hasErrors()) {
            return "login";
        }

        return "LoginSuccess";
    }
}