public class PasswordEncrypt {    public static String encodeByMd5(String string) throws NoSuchAlgorithmException, UnsupportedEncodingException {        // 确定计算方法        MessageDigest md5 = MessageDigest.getInstance("MD5");        Base64.Encoder base64Encoder = Base64.getEncoder();        // 加密字符串        return base64Encoder.encodeToString(md5.digest(string.getBytes("utf-8")));    }}