spring mvc3中的addFlashAttribute方法
记得在spring mvc2中，当保存POJO到数据库后,要返回成功页面，如果这个时候要带点信息， 则要这样： Java代码:

//第三个参数（UserModel user）默认为绑定对象 @RequestMapping(value = "/user/save", method = RequestMethod.POST) public ModelAndView saveUser(HttpServletRequest request, HttpServletResponse response,UserModel user) throws Exception { ModelAndView mv = new ModelAndView("/user/save/result");//默认为forward模式 // ModelAndView mv = new ModelAndView("redirect:/user/save/result");//redirect模式 mv.addObject("message","保存用户成功！"); return mv; }

而在spring mvc 3.1后，可以这样 Java代码:

@RequestMapping(value = "/user/save", method = RequestMethod.POST) public ModelAndView saveUser(UserModel user, RedirectAttributes redirectAttributes) throws Exception { redirectAttributes.addFlashAttribute("message", "保存用户成功！");//使用addFlashAttribute,参数不会出现在url地址栏中 return "redirect:/user/save/result"; }

来个稍微完整点的例子，首先是一个表单，在其中填入一些信息： Java代码:

<form:form id="myform" action="saveUserDetails.action" method="POST" commandName="user"> <form:input type="text" name="firstName" path="firstName"/> <form:input type="text" name="lastName" path="lastName"/> <form:input type="text" name="email" path="email"/> <input type="submit" value="submit"> </form:form>

则在controller中，可以这样： Java代码:

@RequestMapping(value="/saveUserDetails.action", method=RequestMethod.POST) public String greetingsAction(@Validated User user,RedirectAttributes redirectAttributes){ someUserdetailsService.save(user); redirectAttributes.addFlashAttribute("firstName", user.getFirstName()); redirectAttributes.addFlashAttribute("lastName", user.getLastName()) return "redirect:success.html"; } success.html: <div> <h1>Hello ${firstName} ${lastName}. Your details stored in our database.</h1> </div><br>

但如果F5的时候，会发现参数丢失，因为flash scope其实只支持redirect的，所以可以判断下： Java代码:

@RequestMapping(value="/success.html", method=RequestMethod.GET) public String successView(HttpServletRequest request){ Map<String,?> map = RequestContextUtils.getInputFlashMap(request); if (map!=null) return "success"; else return "redirect:someOtherView"; //出其他提示信息 原文地址：http://www.software8.co/wzjs/java/2943.html