How to print reports automatically in a web application

Which part of a web application take responsibility to print reports to a printer automatically after processing data from database ?
Is it doing in JSP , servlet or beans?
How to do it ? How to assign a printer ?
Thanks a lot.

You left out a vital piece of the specification. Where is the printer? Client side or Server side?
Bill

choisn,
Javaranch has a naming policy which is strictly enforced. Please read the policy and change your display name if you wish to continue posting here. Thanks.

Reports are printed in client side.

Server side HTML generation - ie JSP, servlets, beans, can't control a thing on the client side.
Java applet security is specifically set up to prevent what you are trying to do under normal circumstances.
You will have to have a client side application - either a stand alone application or a signed applet.
Bill