Convert existing Socket programs to work over HTTP

Question

Hello,
I have a server and client program, which communicate through sockets. I want to convert the server program to work as a servlet and use HTTP Connection in the client to connect to the server. I mean to say I want these programs to work over HTTP. I also want to know, how can I listen to a specific port in a Java Servlet? Can anyone please help me on this, and also provide some links to resources on this...
With Regards,
Keshav Prasad

Answer 1

1: Listen on port
You should get your application server to listener to the port.
i.e. tomcat default is 8080 http://localhost:8080
change to listen on the port you require ->see application docs
2: Client http connection
URL url = new URL("http://pc015:8080/hrm/departmentnumemployees"+sessid);
            HttpURLConnection con = (HttpURLConnection)url.openConnection();           
            con.setDoOutput(true);
            con.setDoInput(true);
            OutputStream out = con.getOutputStream();
            PrintWriter pw = new PrintWriter(out);
            pw.println(depart);
            pw.flush();
            con.connect();
            BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String res = br.readLine();3: Servlet: put this in method
ServletInputStream sis = request.getInputStream();
            InputStreamReader inr = new InputStreamReader(sis);
            BufferedReader br = new BufferedReader(inr);
            // setup writer
            PrintWriter pw = response.getWriter();
            // process
            String name = br.readLine();