java笔记之InputStream转换成String

private static String changeInputStream(InputStream inputStream,
            String encode) {
        // TODO Auto-generated method stub
        // 将InputStream转换为Reader，并使用缓冲读取，提高效率，同时可
        // 以按行读取内容
        BufferedReader br;
        String result = null;
        try {
            br = new BufferedReader(new InputStreamReader(inputStream, encode));
            String line = null;

            while ((line = br.readLine()) != null) {
                result += line;
            }
            inputStream.close();
            return result;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return "";
    }

Done！