public static String md5(String input) {

        String md5 = null;

        if(null == input) return null;

        try {

        //Create MessageDigest object for MD5
        MessageDigest digest = MessageDigest.getInstance("MD5");

        //Update input string in message digest
        digest.update(input.getBytes(), 0, input.length());

        //Converts message digest value in base 16 (hex)
        md5 = new BigInteger(1, digest.digest()).toString(16);

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();
        }
        return md5;
    }