您想要的方法是getServerCertificates，而不是getServerCertificateChain。有一些很好的示例代码在这里。
添加了一些我自己的示例代码。为您的好起点。不要忘记查看HttpsURLConnection和X509Certificate的Javadocs 。
import java.net.URL;
import java.security.cert.Certificate;
import java.security.cert.CertificateExpiredException;
import java.security.cert.X509Certificate;
import javax.net.ssl.HttpsURLConnection;
public class TestSecuredConnection {
/**
* @param args
*/
public static void main(String[] args) {
TestSecuredConnection tester = new TestSecuredConnection();
try {
tester.testConnectionTo("https://www.google.com");
} catch (Exception e) {
e.printStackTrace();
}
}
public TestSecuredConnection() {
super();
}
public void testConnectionTo(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) {
try {
( (X509Certificate) cert).checkValidity();
System.out.println("Certificate is active for current date");
} catch(CertificateExpiredException cee) {
System.out.println("Certificate is expired");
}
}
}
}
}
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