my requirement is to develop rich web applications quickly and easily, and the framework must be easy/compatible with spring something like IceFaces
i am confused about IceFaces/PrimeFaces, or use jsp with YUI/DWR
please advise me.
I wrote Spring integration with JSF 2.1 + RichFaces 4. it works not bad, if you are searching for rapid rich client implementation it might be good choice though.
You can see basic tutorial how it works:
http://www.mkyong.com/jsf2/jsf-2-0-spring-integration-example/