java的md5加密

    public static String getMD5(String input) {
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("MD5");
        }
        catch(NoSuchAlgorithmException e)
        {
            log.fatal("Not such algorithm, application may fail to run correctly");
        }

        try {
            byte[] messageDigest = md.digest(input.getBytes("UTF-8"));
            byte[] encoded = Base64.encode(messageDigest);
            String retValue = new String(encoded);
            return retValue;
        } catch (UnsupportedEncodingException ex) {
            log.error("Assertion: MD5 unsupported encodingException. This should never orccur.");
            ex.printStackTrace();
        }

        return input;

    }