Map map= new HashMap(); boolean isMultipart = ServletFileUpload.isMultipartContent(request); if (isMultipart) { // File upload // Processing with stream api to improve performance // System.err.println("file upload request.. ."); ServletFileUpload upload = new ServletFileUpload(); FileItemIterator fileItemIterator = upload.getItemIterator(request); for (; fileItemIterator.hasNext();) { FileItemStream item = fileItemIterator.next(); String name = item.getFieldName(); System.out.println(name); if (item.isFormField()) { InputStream stream = item.openStream(); // 普通域 String value = Streams.asString(stream, "UTF-8"); if (map.containsKey(name)) { String valueto = (String) map.get(name); valueto += "," + value; map.put(name, valueto); } else { map.put(name, value); } stream.close(); } else { // File field InputStream in = item.openStream(); // Get file stream } } }