I am implementing an applet ---servlet communication. There are two parameters that need to be sent by applet to the servlet. I am not sure can I implement the transferring process as follows? If not, how to handle the transferring processing involving multiple parameters? Thanks.
Applet side:
// send data to the servlet
URLConnection con = getServletConnection(hostName);
OutputStream outstream = con.getOutputStream();
System.out.println("Send the first parameter");
ObjectOutputStream oos1 = new ObjectOutputStream(outstream);
oos1.writeObject(parameter1);
oos1.flush();
oos1.close();
System.out.开发者_StackOverflowprintln("Send the second parameter");
ObjectOutputStream oos2 = new ObjectOutputStream(outstream);
oos2.writeObject(parameter2);
oos2.flush();
oos2.close();
Servlet side:
InputStream in1 = request.getInputStream();
ObjectInputStream inputFromApplet = new ObjectInputStream(in1);
String receievedData1 = (String)inputFromApplet.readObject();
InputStream in2 = request.getInputStream();
ObjectInputStream inputFromApplet = new ObjectInputStream(in2);
String receievedData2 = (String)inputFromApplet.readObject();
For simplicity, you should use HTTP GET or POST parameters (since they are String values).
Applet side :
URL postURL = new URL("http://"+host+"/ServletPath");
HttpURLConnection conn = (HttpURLConnection) postURL.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.connect();
PrintWriter out = new PrintWriter(conn.getOutputStream());
out.write("param1="+URLEncoder.encode(parameter1)+"¶m2="+URLEncoder.encode(parameter2));
out.flush();
The host can be obtain from getCodeBase().getHost()
in you Applet instance.
Servlet Side :
void doPost(HttpServletRequest req, HttpServletResponse resp) {
String parameter1 = req.getParameter("param1");
String parameter2 = req.getParameter("param2");
}
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