Javascript 想在alertbox的jsp页面上显示控制器消息吗_Javascript_Spring_Jsp_Model View Controller

Javascript 想在alertbox的jsp页面上显示控制器消息吗

javascript spring jsp model-view-controller

Javascript 想在alertbox的jsp页面上显示控制器消息吗,javascript,spring,jsp,model-view-controller,Javascript,Spring,Jsp,Model View Controller,首先，您需要在隐藏输入中设置msg值 @RequestMapping(value = "/register", method = RequestMethod.POST) public String register(@ModelAttribute("student") Student s, Model model) { boolean isRegistered = sptiService.add(s); if (isRegistered == true)

首先，您需要在隐藏输入中设置msg值

@RequestMapping(value = "/register", method = RequestMethod.POST)
    public String register(@ModelAttribute("student") Student s, Model model) {

        boolean isRegistered = sptiService.add(s);
        if (isRegistered == true)
            model.addAttribute("msg", "You have registered");
        else
            model.addAttribute("msg", "Unable to register");
        return "home";
    }

 <!doctype html>
 <html lang="en">
 <head></head>
 <title></title>
 <body>
 <input type="hidden" value="${msg}" id="hiddenId">

 <script type="text/javascript">
      alert($("#hiddenId").val());
 </script>

 </body>
</html>