上传文件时后台的request对象时空的，tempFile里面什么都没有

Question

public void doPost(HttpServletRequest req, HttpServletResponse resp)      throws ServletException, IOException {   System.out.println("已接收到请求");   //获取前台传过来的流信息   InputStream fileSource = req.getInputStream();   //临时文件存储位置   String tempFileName = "D:/temp/tempFile";   //创建临时文件   File tempFile = new File(tempFileName);   //输出流指向临时文件   FileOutputStream outputStream = new FileOutputStream(tempFile);   byte b[] = new byte[1024];   int n;   //从输入流读取内容写入到输出流   while(( n = fileSource.read(b)) != -1){      outputStream.write(b, 0, n);   }   //关闭输入、输出流   outputStream.close();   fileSource.close();}

Answer 1

                DiskFileItemFactory factory = new DiskFileItemFactory();
		factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb
		factory.setRepository(new File(this.getServletContext().getRealPath("WEB-INF")));// 设置缓冲区目录
		ServletFileUpload upload = new ServletFileUpload(factory);
		List<FileItem> items = upload.parseRequest(request);// 得到所有的文件
		Iterator<FileItem> i = items.iterator();
		if (!i.hasNext()) {
			logger.warn("receiveFile ,file not exists!");
			return;
		}
		FileItem fi = (FileItem) i.next();
		fi.getInputStream()

Answer 2

别忘了采纳