spring mvc 參數及返回

方法可接受參數：    

      ServletRequest servletRequest,
          HttpServletRequest httpServletRequest,    //*
          ServletResponse serlResponse,
          HttpServletResponse httpServletResponse,  //*
          InputStream requestIn,                    //*至關於request.getInputStream
          OutputStream responseOut,                 //*至關於response.getOut
          HttpSession session,                      //*必定有值，並且是線程不安全的。要想設置在RequestMappingHandlerAdapter中設置sychnizedOnSession
          User user,                                //*表單提交對象
          Errors errors,                            //網頁出錯對象
          //BindingResult result,
          Model model,                              //*forward時能夠取得當前的數據，也能夠取得提交過來 的數據模型。若是方法中最後返回的modelAndView會覆蓋model的值
          Local local,
          Principal principal

 

返回

方式一：使用ModelAndView

 return new ModelAndView("redirect:/toList");

        這樣能夠重定向到toList這個方法

方式二：返回String

return "redirect:/ toList ";