Springリダイレクト

@RequestMapping(value = "/register", method = RequestMethod.POST)
public String processRegistration(Model model) {

    //               URL 
    model.addAttribute("username", "");
    model.addAttribute("password","");

    //        /success
    return "redirect:/success";
}

@RequestMapping(value = "/register", method = RequestMethod.POST)
public String processRegistration(RedirectAttributes model) {

    //               URL 
    model.addAttribute("username", "");
    model.addAttribute("password","");

    List<String> list = new ArrayList<>();

    //      session ，          model.getFlashAttributes();   
    model.addFlashAttribute("object", list);

    //        /success
    return "redirect:/success";
}