春季MVC，更新表单上的模型贴图仍然显示旧信息

Question

请承担我对spring mvc的有限了解。 我试图在POST请求后用更新的模型信息刷新视图。新的信息出现在视图上，以及旧版本，这完全混淆了视图。

这是我的控制器代码。如果您发现某些不正确的信息，请提前通知我！

@Controller 
@SessionAttributes({"Game"}) 
public class SimpleController { 

    @Autowired 
    private SessionLocaleResolver localeResolver; 

    private LoginValidator loginValidator; 
    private GameValidator gameValidator; 

    @Autowired 
    public void setLoginValidator(LoginValidator loginValidator) { 
     this.loginValidator = loginValidator; 
    } 

    @Autowired 
    public void setGameValidator(GameValidator gameValidator) { 
     this.gameValidator = gameValidator; 
    } 

    @RequestMapping(value = "/login", method = RequestMethod.GET) 
    public ModelAndView init(ModelMap model) { 

     ModelAndView mav = new ModelAndView("/views/login.jsp"); 
     LoginBean loginBean = new LoginBean(); 
     model.addAttribute("LoginBean", loginBean); 
     model.addAttribute("game", new Game()); 

     model.addAttribute("ENGLISH", Language.ENGLISH); 
     model.addAttribute("SPANISH", Language.SPANISH); 

     mav.addObject("LoginBean", loginBean); 
     return mav; 

    } 

    @RequestMapping (value="/processLogin", method=RequestMethod.POST) 
    public String login (HttpServletRequest request, HttpServletResponse response, 
      @ModelAttribute("loginBean") LoginBean loginBean, 
      BindingResult result, ModelMap model) { 


     this.loginValidator.validate(loginBean, result); 

     if (result.hasErrors()) { 
      return "redirect:/login.htm"; 
     } 

     Game game = new Game();  

     if (loginBean.getLanguage() == Language.ENGLISH) {   
      localeResolver.setLocale(request, response, new Locale("EN")); 
     } 
     else{ 
      localeResolver.setLocale(request, response, new Locale("ES")); 
     } 

     loginBean.setDictionary(FileLoader.loadDictionary(loginBean.getLanguage()));   

     game.setPlayer(loginBean.getPlayer()); 
     game.setLanguage(loginBean.getLanguage()); 
     game.setDictionary(loginBean.getDictionary()); 
     game.setSelectedWord(game.getRandomWord(game.getDictionary())); 


     model.addAttribute("Game", game); 
     request.getSession().setAttribute("game", game); 

     System.out.println(game.getSelectedWord()); 

     return "redirect:/index.htm"; 
    } 


    @RequestMapping(value = "/index", method = RequestMethod.GET) 
    public ModelAndView play(HttpServletRequest request, 
      @ModelAttribute("game") Game game, ModelMap model){   

     ModelAndView mav = new ModelAndView("/views/index.jsp"); 

     if(request.getSession().getAttribute("game") != null) { 
      game = (Game)request.getSession().getAttribute("game"); 
      mav.addObject("game", game);   
     } else { 
      System.out.println("nothing received"); 
     } 

     request.getSession().setAttribute("game", game); 

     return mav; 
    } 

    @RequestMapping (value="/guessLetter", method=RequestMethod.POST) 
    public ModelAndView guessLetter (HttpServletRequest request, HttpServletResponse response, 
      @ModelAttribute("game") Game game, @RequestParam("guess") String guess, 
      SessionStatus status, ModelMap model) { 

     ModelAndView mav = new ModelAndView("/views/index.jsp"); 

     if(request.getSession().getAttribute("game") != null) { 
      game = (Game)request.getSession().getAttribute("game"); 

      game.guessLetter(guess); 

     } else { 
      System.out.println("no guess!"); 
     } 


     //model.replace("game", game); tried this, but didn't work 
     System.out.println(model.entrySet()); 
     model.addAttribute("Game", game); 
     //request.getSession().setAttribute("game", game); 

     mav.addObject("game", game); 
     status.setComplete(); 

     return mav; 

    } 


} 

Answer 1

原来我没有完全理解SessionStatus方法。这个答案已经真正有用的https://stackoverflow.com/a/24342814/2438413

下面是任何人的情况下我的职业控制器想以供参考：

@RequestMapping (value="/guessLetter", method=RequestMethod.POST) 
     public ModelAndView guessLetter (HttpServletRequest request, HttpServletResponse response, 
       @ModelAttribute("game") Game game, @RequestParam("guess") String guess, 
       SessionStatus status, ModelMap model, BindingResult result) { 
      System.out.println(guess); 

      this.letterValidator.validate(game, result); 

      if (result.hasErrors()) { 
       return new ModelAndView("/views/index.jsp"); 
      }  

      request.getSession().setAttribute("game", game);   
      game.guessLetter(guess);   

      System.out.println(game.getGuessList()); 

      ModelAndView mav = new ModelAndView("redirect:index.htm"); 

      mav.addObject("game", game); 
      model.addAttribute("game", game); 
      return mav; 
     }