A servlet From an applet

Question

Dear friends,
Hope you are doing well.
I am facing a problem of how to call a servlet from an applet.
Any help , please forward it.
thanks
vishal

Answer 1

You can communicate with servlet from an applet, using URL connection, and then send POST/GET methods through HTTP protocol, here is a code snippet,
// applet side, this method will send a POST method to the servlet and then get url openstream to read a
// returned object from the servlet, params should be in the form param1=value&param2=value etc...
public Object getObjectFromServlet(String servletName,String params) {
    Object object = null;
    try {
      URL url = new URL(codeBase,
                        contextRoot + servletName + params);
      URLConnection con = url.openConnection();
      con.setUseCaches(false);
      InputStream in = con.getInputStream();
      ObjectInputStream result = new ObjectInputStream(in);
      object = result.readObject();
      result.close();
      in.close();
    catch (ClassNotFoundException ex) {
      System.err.println("ClassNotFoundException caught:" + ex.getMessage());
    catch (MalformedURLException ex) {
      System.err.println("MalformedURLException caught:" + ex.getMessage());
    catch (IOException ex) {
      System.out.println("IOException caught:" + ex.getMessage());
    return object;
//servlet side
public void doPost(HttpServletRequest request, HttpServletResponse response){
      //Extract all the necessary supplied parameters from the request object and configurations.
       String param1 = request.getParameter("param1");
       String param2 = request.getParameter("param2");
  try {
        ObjectOutputStream out = new ObjectOutputStream(response.getOutputStream());
        out.writeObject(object);
        out.close();
      catch (IOException ioe) {
        System.err.println("IOException caught:" + ioe.getMessage());
}