如何在Java中获取证书信息

我正在尝试获取和读取仅使用Java的证书。我应该看哪些代码或示例来获得网站证书

例如，网站：

我是否使用URL类

URL url = new URL("https://google.com");

---

好的，我刚刚找到了如何获得我想要的信息

public void certInformation(String aURL) throws Exception{
        URL destinationURL = new URL(aURL);
        HttpsURLConnection conn = (HttpsURLConnection) destinationURL.openConnection();
        conn.connect();
        Certificate[] certs = conn.getServerCertificates();
        for (Certificate cert : certs) {
            System.out.println("Certificate is: " + cert);
            if(cert instanceof X509Certificate) {
                    X509Certificate x = (X509Certificate ) cert;
                    System.out.println(x.getIssuerDN());
            }
        }
    }

也许这会有帮助：