JavaHttpsExample.java

package foo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.cert.Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;

public class JavaHttpsExample {
	public static void main(String[] args) throws Exception {
		String httpsURL = "https://www.google.com/";
		URL myurl = new URL(httpsURL);
		HttpsURLConnection con = (HttpsURLConnection) myurl.openConnection();

		printHttpsCert(con);

		InputStream ins = con.getInputStream();
		InputStreamReader isr = new InputStreamReader(ins);
		BufferedReader in = new BufferedReader(isr);

		String inputLine;

		while ((inputLine = in.readLine()) != null) {
			System.out.println(inputLine);
		}

		in.close();
	}

	private static void printHttpsCert(HttpsURLConnection con) {

		if (con != null) {

			try {

				System.out.println("Response Code : " + con.getResponseCode());
				System.out.println("Cipher Suite : " + con.getCipherSuite());
				System.out.println("\n");

				Certificate[] certs = con.getServerCertificates();
				for (Certificate cert : certs) {
					System.out.println("Cert Type : " + cert.getType());
					System.out.println("Cert Hash Code : " + cert.hashCode());
					System.out.println("Cert Public Key Algorithm : "
							+ cert.getPublicKey().getAlgorithm());
					System.out.println("Cert Public Key Format : "
							+ cert.getPublicKey().getFormat());
					System.out.println("\n");
				}

			} catch (SSLPeerUnverifiedException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}

		}

	}
}