記得在spring mvc2中，當保存POJO到數據庫后,要返回成功頁面，如果這個時候要帶點信息，
則要這樣：
Java代碼:
- //第三個參數（UserModel user）默認為綁定對象
- @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");//默認為forward模式
- // ModelAndView mv = new ModelAndView("redirect:/user/save/result");//redirect模式
- mv.addObject("message","保存用戶成功！");
- return mv;
- }
而在spring mvc 3.1后，可以這樣
Java代碼:
- @RequestMapping(value = "/user/save", method = RequestMethod.POST)
- public ModelAndView saveUser(UserModel user, RedirectAttributes redirectAttributes) throws Exception {
- redirectAttributes.addFlashAttribute("message", "保存用戶成功！");//使用addFlashAttribute,參數不會出現在url地址欄中
- return "redirect:/user/save/result";
- }
來個稍微完整點的例子，首先是一個表單，在其中填入一些信息：
Java代碼:
- <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>
則在controller中，可以這樣：
Java代碼:
- @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的時候，會發現參數丟失，因為flash scope其實只支持redirect的，所以可以判斷下：
Java代碼:
- @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"; //給出其他提示信息
原文地址：http://www.software8.co/wzjs/java/2943.html