Fazer Request à url https

DefaultHttpClient httpclient = new DefaultHttpClient();

        KeyStore trustStore  = KeyStore.getInstance(KeyStore.getDefaultType());        
        FileInputStream instream = new FileInputStream(new File("c:/workspace/certificados/certificado.keystore")); 
        try {
            trustStore.load(instream, "123456".toCharArray());
        } finally {
            instream.close();
        }
        
        SSLSocketFactory socketFactory = new SSLSocketFactory(trustStore);
        Scheme sch = new Scheme("https", socketFactory, 443);
        httpclient.getConnectionManager().getSchemeRegistry().register(sch);

        HttpGet httpget = new HttpGet("https://cav.receita.fazenda.gov.br/scripts/CAV/login/login.asp");

        System.out.println("executing request" + httpget.getRequestLine());
        
        HttpResponse response = httpclient.execute(httpget);
        HttpEntity entity = response.getEntity();

        System.out.println("----------------------------------------");
        System.out.println(response.getStatusLine());
        if (entity != null) {
            System.out.println("Response content length: " + entity.getContentLength());
        }
        if (entity != null) {
            entity.consumeContent();
        }

        // When HttpClient instance is no longer needed, 
        // shut down the connection manager to ensure
        // immediate deallocation of all system resources
        httpclient.getConnectionManager().shutdown();