public static String getSignContent(final String secureKey, final String timestamp, final String path) {
        Map<String, String> map = new HashMap<>(3);
        map.put("timestamp", timestamp);
        map.put("path", path);
        map.put("version", VERSION);

        List<String> storedKeys = Arrays.stream(map.keySet()
                .toArray(new String[] {}))
            .sorted(Comparator.naturalOrder())
            .collect(Collectors.toList());
        final String signContent = storedKeys.stream()
            .map(key -> String.join("", key, map.get(key)))
            .collect(Collectors.joining()).trim()
            .concat(secureKey);
        return signContent;
    }
getSignContent.
@param secureKey secureKey
@param timestamp timestamp
@param path path
@return String
shenyu-admin/src/main/java/org/apache/shenyu/admin/utils/ShenyuSignatureUtils.java