The responses of servlets called by an applet

Question

I'd like to do so that my applet calls a servlet, sending to it some data, and that the response of my servlet is displayed in my applet's frame, as any HTML page.
How can I do that ?
Thank's.

Answer 1

Your applet to servlet communication is as object streams.So while sending data to servlet you do,
HttpURLConnection connection = (HttpURLConnection) urlServeur.openConnection();
connection.setRequestProperty("Content-Type", "application/octet-stream");
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(false);
ObjectOutputStream oos = new ObjectOutputStream(connection.getOutputStream());
oos.writeObject(entreprise);
oos.flush();
oos.close();
Note: DoOutput(false) is there.
For your applet to read the data back you have to do the same like this,
public InputStream sendPostData(java.util.Hashtable args) throws java.io.IOException
     URLConnection con = servlet.openConnection();
     if((args != null))     {
          con.setDoInput(true);
          con.setDoOutput(true);
          con.setUseCaches(false);
          con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
          ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream());
          out.writeObject(args);
          out.flush();
          out.close();
     return con.getInputStream();
you read the objects from the stream and do whatever u want.
In servlet you have to make sure to serialize the objects or use objects that implement serializable and write in a output stream like this,
private void writeOutput(HttpServletRequest req,HttpServletResponse res,java.util.Hashtable hash) throws java.io.IOException {
          ObjectOutputStream out = new ObjectOutputStream(res.getOutputStream());
          out.writeObject(hash);
          out.flush();
          out.close();
Hope it helps.!Good Luck.!