cannot resolve tag library

when i use below tag in my jsp:

<%@taglib uri="http://java.sun.com/portlet" prefix="portlet"%>

gettting error as :

Caused by: nested exception is weblogic.servlet.jsp.JspException: (line 1):

Could not parse deployment descriptor: java.io.IOException:

cannot resolve'http://java.sun.com/portlet' into a valid tag library

any tld file do i need to use here? (i am using Spring framework and JSR 168) anything need to config in web.xml?

[511 byte] By [kasima] at [2007-11-27 11:06:28]