//String https_url = "https://localhost:9001/init?playerId=3344";
       String https_url = "https://localhost:9001/play?playerId=3344";
    URL url;
    try {
            url = new URL(https_url);
            HttpsURLConnection con = (HttpsURLConnection)url.openConnection();
            con.setDoInput(true);
            con.setDoOutput(true);
            con.setRequestMethod("POST");
            OutputStreamWriter output = new OutputStreamWriter(con.getOutputStream());
            String postData=
                "<TransactionId>" 
                                + "13256477107065" 
                                //这个id是https_url为注释掉的那个init URL返回的结果，我直接copy放在这里 
                + "</TransactionId>";
            output.write(postData);
            output.flush();
                                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 (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }