Java Applet 怎么实现Web实时通讯

Question

能说点详细点吗?
 小弟是初学

Answer 1

/**
 * Get a connection to the servlet.
 */
private URLConnection getServletConnection()
throws MalformedURLException, IOException { URL urlServlet = new URL(baseurl, "/echo");
System.out.println(urlServlet);
HttpURLConnection con = (HttpURLConnection) urlServlet
.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type",
"application/x-java-serialized-object");
return con;
} /**
 * Send the inputField data to the servlet and show the result in the
 * outputField.
 */
private String onSendData(UpFile upfile) {
try {
// send data to the servlet
URLConnection con = getServletConnection();
OutputStream outstream = con.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(outstream);
oos.writeObject(upfile.getFile());
oos.writeObject(upfile.getFilePath());
oos.flush();
oos.close(); // receive result from servlet
InputStream instr = con.getInputStream();
ObjectInputStream inputFromServlet = new ObjectInputStream(
instr);
String result = (String) inputFromServlet.readObject();
inputFromServlet.close();
instr.close();
return result;
} catch (Exception ex) {
ex.printStackTrace();
System.out.println("bad");
return null;
}
}这个就是我最近的项目中用到的applet和servlet通信的两个method 你可以学着照做