流-字符串装换

/**** * 流-字符串 * @param is * @return */private String inputStream2String(InputStream is){   BufferedReader in = new BufferedReader(new InputStreamReader(is));   StringBuffer buffer = new StringBuffer();   String line = "";   try {while ((line = in.readLine()) != null){     buffer.append(line).append("\n");   }} catch (IOException e) {e.printStackTrace();}return buffer.toString();   }