How do I display real time data which is keep on changing (sometimes miliseconds, seconds, min etc.) and data basically in form of (say in tabular format) coming into jsp page. In this jsp how can we use jquery based ajax call?

JSP sounds disturbing. jquery based ajax call? Please structure your question properly and in much more detail. Since you have not mentioned any constraints, here is a generic solution: What you are looking for is "ajax polling". look around for that and you will understand how to implement it. Now, since the data you are displaying is changing rapidly you would probably need a socket based solution (like websockets). I would suggest http://socket.io that runs on http://nodejs.org. To get a feel of its power and ease, try this simple tutorial that uses MySQL as a datasource -  http://markshust.com/2013/11/07/creating-nodejs-server-client-socket-io-mysql. The characteristics of this solution has the following advantage: socket.io will use a lightweight websocket to easily maintain real time communication. the client side listener will automatically update the data, you will not have to explicitly do it (in most cases). If a websocket fails to open, socket.io will fallback to ajax polling automatically. Therefore your real time requirement will not break in such a case. This solution will get you off your feet in a very short span of time (few hours to one day). There are other things you have to decide on, once you have the basic solution in place: Do you want to ensure that your code handles disconnection problems gracefully? What is the scale of data and pushing notifications are you looking at? (writing code by anticipating scaling is a bad idea however, first face the problem, then scale) If you want inspiration, check out the http://blog.fogcreek.com/the-trello-tech-stack/. Their web-app loads in half a second in a decent connection, and their "real-time data changes" are near instantaneous. There is some well engineered code there. Also, this post outlines an overview of how users' status is tracked (also important if you want to push data to specific users): http://stackoverflow.com/questions/21848413/how-does-trello-show-users-online-offline-idle-state-accurately And as my http://krishnarajpm.com says, "One solution is no solution" in engineering. Do some ground work to understand and make a choice of technology.

Following might help you: http://www.html5rocks.com/en/tutorials/eventsource/basics/

You can basically create a servlet that will send you the new information in json/xml format. [can send a request variable - lastupdated], so that the servlet queries for data thats generated after [lastupdated]. On client end you can use jquery ajax to get the results in json format through this servlet and then populate the table. http://www.w3schools.com/jquery/ajax_getjson.asp You can setInterval function of javascript to update the table after every 2 to 5 seconds. http://www.w3schools.com/js/js_timing.asp Hope this approach helps you!