MD5加密

/**
     * MD5加密验证
     * @param time  时间戳字符串
     * @param domainName  请求数据表明
     * @return
     */
    def md5Key(String  time,String domainName){
        def token = "id=" + StaticUtils.IMOCCA_X_LC_ID + "&key=" + StaticUtils.IMOCCA_X_LC_KEY +
                "&time=$time&domainName=$domainName"
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] md5 = md.digest(token.getBytes());
        return byteToHex(md5)
    }

    /**
     * byte转换16进制字符串
     * @param hash
     * @return
     */
    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash)
        {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }