MultipartFile转InputStreamReader BufferedReader

public static BufferedReader multipartFileToBufferedReader(MultipartFile picFile, String charsetName) {
        if (picFile.isEmpty()) {
            return null;
        }
        try {
            InputStream inputStream = picFile.getInputStream();
            InputStreamReader is = new InputStreamReader(inputStream, charsetName);
            BufferedReader br = new BufferedReader(is);
            return br;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }