How to remove Attribute without the use of scriptlet

[Bibhudutta Pradhan]

<%request.removeAttribute("name"); %>

How could I perform this without using <%%> ?

[Bear Bibeault]

First, carefully think about the matter and decide if this is something that should really be done in a JSP. Is it view logic? Or control logic? Should it be done in a controller rather than a JSP?

Then if, and only if, you decide that it should be done in the JSP, you'd search for a way to do it with the JSTL. Perhaps you could google JSTL remove attribute.

[Bibhudutta Pradhan]

what to put in view and what to put in controller, I really dont understand .
Would you please provide me some resource on that ?
Thanks .

[Paul Clapham]

Conceptually it isn't difficult. The controller (e.g. servlet) gathers the request parameters and performs whatever actions are required to update the application's state. This could include updating a database or storing data in the user's session or sending e-mails or whatever other business requirements need to be performed. Then it collects together all of the information required to produce the HTML which is to be sent to the client as the response, and forwards to the view component.

The view (e.g. JSP) takes the information which the controller produced, and generates HTML based on that information.

Note that it isn't the view's responsibility to update the application's state in any way. That's why removing an attribute is a dubious idea for a JSP.