MD5加密

/**
     * MD5加密
     * @param strObj 待加密数据
     * @return
     */
    public static byte[] MD5(String strObj) {
        byte[] resultString = null;
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = md.digest(strObj.getBytes());
        } catch (NoSuchAlgorithmException ex) {
            ex.printStackTrace();
        }
        return resultString;
    }