spring mvc 参数及返回

方法可接受参数：    

      ServletRequest servletRequest,
          HttpServletRequest httpServletRequest,    //*
          ServletResponse serlResponse,
          HttpServletResponse httpServletResponse,  //*
          InputStream requestIn,                    //*至关于request.getInputStream
          OutputStream responseOut,                 //*至关于response.getOut
          HttpSession session,                      //*必定有值，并且是线程不安全的。要想设置在RequestMappingHandlerAdapter中设置sychnizedOnSession
          User user,                                //*表单提交对象
          Errors errors,                            //网页出错对象
          //BindingResult result,
          Model model,                              //*forward时能够取得当前的数据，也能够取得提交过来 的数据模型。若是方法中最后返回的modelAndView会覆盖model的值
          Local local,
          Principal principal

 

返回

方式一：使用ModelAndView

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

        这样能够重定向到toList这个方法

方式二：返回String

return "redirect:/ toList ";