}).orElse(null);
    }

    public static String base64(final String value) {
        if (value == null) {
            return StringUtil.EMPTY;
        }
        return Base64.getUrlEncoder().encodeToString(value.getBytes(Constants.CHARSET_UTF_8));
    }

    public static boolean fileExists(final String path) {
        final File file = new File(LaServletContextUtil.getServletContext().getRealPath(path));