InputSream转为String

public static String convertStreamToString(InputStream is) {
        /*
          * To convert the InputStream to String we use the BufferedReader.readLine()
          * method. We iterate until the BufferedReader return null which means
          * there‘s no more data to read. Each line will appended to a StringBuilder
          * and returned as String.
          */
         BufferedReader reader = new BufferedReader(new InputStreamReader(is));
         StringBuilder sb = new StringBuilder();      

         String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                 sb.append(line + "\n");
             }
         } catch (IOException e) {
             e.printStackTrace();
         } finally {
            try {
                 is.close();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }      

        return sb.toString();
     }