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();
   }