The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files
冲突问题
ServletFileUpload upload1 = new ServletFileUpload(new DiskFileItemFactory());
upload1.setHeaderEncoding("UTF-8");
//通过文件上传核心组件解析request请求,获取到所有的FileItem对象
List fileItemList = upload1.parseRequest(request);
commons.fileupload版本1.4
解决:导入旧版的tomcat



