spring mvc 文件文件长传过大，无法正常重定向

Question

@ControllerAdvice
 public class MulitpartExceptionHandler {

           @ExceptionHandler(MultipartException.class)
           public String handleError(MultipartException e, RedirectAttributes redirectAttributes) {
                redirectAttributes.addFlashAttribute("error", e.getCause().getMessage());
                return "redirect:/uploadForm";
          }

    }
 
    @GetMapping("/uploadForm")
    public String uploadForm() {
        return "upload";
    }

    @PostMapping("/uploadFile")
    public String uploadFile(@RequestParam("file") MultipartFile file, HttpServletRequest request, Model model)
            throws IOException {

        String rootDirectory = request.getSession().getServletContext().getRealPath("/");
        Path path = Paths.get(rootDirectory + fileDirectory + file.getOriginalFilename());

        try {
            file.transferTo(new File(path.toString()));
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("File saving failed", e);
        }
        model.addAttribute("filename", file.getOriginalFilename());

        return "success";
    }

spring mvc 上传文件过大，上面的重定向无效，报异常，请问一下是什么原因，谢谢。
项目代码这里可以下载

Answer 1

设置一下文件上传的大小

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
  <!-- 单位是字节 -->
    <property name="maxUploadSize" value="1000000000"/>
</bean>