It sometimes happens that a response to a Web request takes a while. One way to handle this is to create a subtask that progressively reports on its progress.

Here is the JSP page.

<%
     MyThread mt = new MyThread(response, out);
     mt.start();
%>

Here is a class that does the work, and responds over time on its progress. Make sure that servlet.jar is in the Classpath.

import javax.servlet.jsp.*;
import javax.servlet.http.*;

public class MyThread extends Thread {
  HttpServletResponse response = null;
  JspWriter out = null;
  int seconds = 0;

  public MyThread (HttpServletResponse response, JspWriter out){
    this.response=response;
	this.out=out;
	for (int i=0;i<5;i++){
      doTell();
	}
  }
  
  public void doTell(){
      try {
          Thread.sleep(3000);
          seconds=seconds + 3;
          out.println("Waiting " + seconds + " seconds <BR>");
          out.flush();
     }catch (Exception e){
          out.println("Exception in MyThread " + e);
     }
  }
}