java加密MD5,SHA-1,SHA-256,默认使用SHA-256

电玩女神 2024-04-17 05:40 102阅读 0赞

加密，对应php的代码  hash('sha256', 'xxx');

方式一、

/**
         * 对字符串加密,加密算法使用MD5,SHA-1,SHA-256,默认使用SHA-256
         * @param strSrc 要加密的字符串
         * @param encName 加密类型
         * @return
         */
        public static String encrypt(String strSrc, String encName) {
            MessageDigest md = null;
            String strDes = null;
            byte[] bt = strSrc.getBytes();
            try {
                if (BeanUtil.isEmpty(encName)) {
                    encName = "SHA-256";
                }
                md = MessageDigest.getInstance(encName);
                md.update(bt);
                strDes = bytes2Hex(md.digest()); // to HexString
            } catch (NoSuchAlgorithmException e) {
                return null;
            }
            return strDes;
        }
    
        public static String bytes2Hex(byte[] bts) {
            String des = "";
            String tmp = null;
            for (int i = 0; i < bts.length; i++) {
                tmp = (Integer.toHexString(bts[i] & 0xFF));
                if (tmp.length() == 1) {
                    des += "0";
                }
            des += tmp;
            }
            return des;
        }

方式二、

以下传入的字符串是方式一种strSrc拼接之前的参数，实际两种方式的参数比较后相当于

String strSrc = channelID + channelKey + appID + userID + nonce + timestamp;

public static String createToken(String channelId, String channelKey, String appId, String userId,String nonce, Integer timestamp) throws NoSuchAlgorithmException {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            digest.update(channelId.getBytes());
            digest.update(channelKey.getBytes());
            digest.update(appId.getBytes());
            digest.update(userId.getBytes());
            digest.update(nonce.getBytes());
            digest.update(Long.toString(timestamp).getBytes());
            String token = DatatypeConverter.printHexBinary(digest.digest()).toLowerCase();
            return token;
        }