- @WebServlet(urlPatterns = "/myPage", asyncSupported=true) public class MyActionServlet extends HttpServlet { public MyActionServlet(){ } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { process(req, resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { process(req,resp); } private void process(HttpServletRequest req, HttpServletResponse resp) { System.out.println("Hello world"); req.getSession(); AsyncContext async = req.startAsync(); async.addListener(new AsyncListener() { @Override public void onTimeout(AsyncEvent event) throws IOException { System.out.println("onTimeout:event::"+event); } @Override public void onStartAsync(AsyncEvent arg0) throws IOException { System.out.println("onstart::"); } @Override public void onError(AsyncEvent event) throws IOException { System.out.println("onError.."+event); } @Override public void onComplete(AsyncEvent event) throws IOException { System.out.println("onComplete::"+event); } }); } }