我正在使用bouncy-castle庫制作一個TLS-Handshake并Web-Server獲取公共證書。下面是我的代碼 private org.bouncycastle.asn1.x509.Certificate[] certificateList;    public static void main(String... args) {        new BCMain().testBCTLS();    }    private void testBCTLS() {        try {            Socket s = new Socket(InetAddress.getByName(WEB_SERVER), WEB_SERVER_PORT);            //TlsProtocolHandler tlsHandler = new TlsProtocolHandler(s.getInputStream(), s.getOutputStream());            TlsClientProtocol protocol = new TlsClientProtocol(s.getInputStream(), s.getOutputStream(), new SecureRandom());            TlsClient client = new DefaultTlsClient() {                private Boolean connectionStatus = Boolean.FALSE;                @Override                public TlsAuthentication getAuthentication() throws IOException {                    return new ServerOnlyTlsAuthentication() {                        public void notifyServerCertificate(Certificate serverCertificate)                                throws IOException {                            certificateList = serverCertificate.getCertificateList();                        }                    };Subject Alternative Names我想從那個公共證書中提取JDK 的X509Certificate有提取方法..但我想從證書中獲取相同的方法。SubjectAlternativeNamesbouncy-castle有人可以幫忙嗎？