login

connection= (HttpsURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);

connection.addRequestProperty("Content-Type:","application/x-www-form-urlencoded");
connection.addRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8");
 connection.connect();
                OutputStream os = connection.getOutputStream();
                String enc = URLEncoder.encode("j_username=***********&j_password=**************");

                System.out.println("encoder---->"+enc.toString());

                PrintWriter pri = new PrintWriter(os);
                pri.write(enc);
                pri.flush();

                int responseCode = connection.getResponseCode();
                String responseCode1 = connection.getResponseMessage();
                pri.close();

System.out.println("\nSending 'POST' request to URL : " + url);

                System.out.println("Response Code : " + responseCode);

                System.out.println("Response message : " + responseCode1);


InputStream stream = connection.getInputStream();

System.out.println("input stream------>>"+stream.toString());


                BufferedReader reader = new BufferedReader(new InputStreamReader(stream));

                char[] buffer =new char[10*1024];
                reader.read(buffer);
                risultato = new String(buffer);

System.out.println("buffer ------->>>>"+risultato);

                connection.disconnect();