HttpsTest.java

package org.httpkit.client;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.cert.Certificate;

public class HttpsTest {
    public static void main(String[] args) throws IOException {

        HttpsURLConnection con = (HttpsURLConnection) new URL("https://github.com").openConnection();
        print_https_cert(con);

        //dump all the content
        print_content(con);

    }

    private static void print_content(HttpsURLConnection con) {
        if (con != null) {

            try {

                System.out.println("****** Content of the URL ********");
                BufferedReader br =
                        new BufferedReader(
                                new InputStreamReader(con.getInputStream()));

                String input;

                while ((input = br.readLine()) != null) {
                    System.out.println(input);
                }
                br.close();

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

        }

    }

    private static void print_https_cert(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();
            }

        }

    }
}