fileupload插件調用upload.parseRequest(request)解析得到空值問題

得到的list長度是0，項目配置不能改變，沒辦法了，只能將HttpServletRequest強換成DefaultMultipartHttpServletRequest ,直接獲取表單中的字段了。方法很low，還是解決了自己的問題

DefaultMultipartHttpServletRequest httpServletRequest = (DefaultMultipartHttpServletRequest) request;
MultipartFile multipartFile = httpServletRequest.getFile("file");
String Id = httpServletRequest.getParameter("Id");