小编Par*_*asu的帖子

我需要通过java以编程方式获取安全网站的公钥.我看了这个,这个,这个和这个和其他的方面.但我还没有找到通过java获得它的解决方案.

编辑:::

根据Zielu的回答,我写了以下程序:

import java.security.PublicKey;
import java.security.cert.Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;

public class RetrievePublicKey {

    private static PublicKey getKey(String hostname, int port) throws Exception {
        SSLSocketFactory factory = HttpsURLConnection.getDefaultSSLSocketFactory();        
        SSLSocket socket = (SSLSocket) factory.createSocket(hostname, port);
        socket.startHandshake();
        Certificate[] certs = socket.getSession().getPeerCertificates();
        Certificate cert = certs[0];
        PublicKey key = cert.getPublicKey();
        System.out.println(key);
        return key;
    }
    public static void main(String[] args) throws Exception {
        System.out.println(getKey("bctcl-parasuram.bctchn.local", 8443));
    }

}

但是当我运行它时,我得到以下异常:

Exception in thread "main" javax.net.ssl.SSLHandshakeException: …