HMACSHA加密方法

 /** 计算签名 */
  public String getSign(Map<String, String> params)
      throws UnsupportedEncodingException {
    TreeMap<String, String> map = Maps.newTreeMap();
    map.putAll(params);
    TreeSet<String> treeSet = Sets.newTreeSet();
    for (Map.Entry<String, String> entry : map.entrySet()) {
      treeSet.add(
          URLEncoder.encode(entry.getKey(), StandardCharsets.UTF_8.name())
              + "="
              + URLEncoder.encode(entry.getValue(), StandardCharsets.UTF_8.name()));
    }
    String join = String.join("&", treeSet);
    join = join.replace("+", "%20");
    join = join.replace("*", "%2A");
    join = join.replace("~", "%7E");
    String code = URLEncoder.encode(join, StandardCharsets.UTF_8.name());
    code = code.toUpperCase();
    byte[] hmac = new HmacUtils(HmacAlgorithms.HMAC_SHA_1, secretAccessKey + "&").hmac(code);
    return Base64.getEncoder().encodeToString(hmac);
  }

Map<String, String> paramMap = new HashMap<>();
        List<String> keyList = new ArrayList<>();
        for (String param : params) {
            String[] kv = param.split("\\=", 2);
            keyList.add(kv[0]);
            paramMap.put(kv[0], kv.length > 0 ? kv[1] : "");
        }

        keyList.sort(new Comparator<String>() {
            @Override
            public int compare(String o1, String o2) {
                return o1.compareTo(o2);
            }
        });

        String stringToSign = method.toUpperCase() + accessKey + timeStamp + uuid;
        for (String key : keyList) {
            stringToSign += key;
            stringToSign += paramMap.get(key);
        }

        Mac hmacSha256 = Mac.getInstance("HmacSHA256");
        byte[] keyBytes = accessKey.getBytes(StandardCharsets.UTF_8);
        hmacSha256.init(new SecretKeySpec(keyBytes, 0, keyBytes.length, "HmacSHA256"));
        String sign = new String(
                Base64.getEncoder().encode(hmacSha256.doFinal(stringToSign.getBytes(StandardCharsets.UTF_8))));
    

MD5加密:

String stringToSign = accessKey + accessSecret + timeStamp;
java.security.MessageDigest md5 = MessageDigest.getInstance("MD5");
        byte[] signature = null;
        signature = md5.digest(stringToSign.getBytes(StandardCharsets.UTF_8));
String ret = bytes2String(signature);

public static String bytes2String(byte[] signature) {
        char[] chars = new char[signature.length * 2];
        int i = 0;
        for (byte sig : signature) {
            chars[i++] = HEX_CHARS[(sig & 0xFF) >> 4];
            chars[i++] = HEX_CHARS[sig & 0xF];
        }
        return new String(chars);
    }