Unable to deploy Java program for App Engine

An internal error occurred during: "Deploying twittscript to Google".
Received IOException parsing the input stream for C:/Users/ming/workspace/twittscript/war\WEB-INF/web.xml

any one can help?

Reference appspot using Java

http://sticky.appspot.com/

DWR demo

http://youactivist.appspot.com/dwr/test/Demo

I better list of Java framework support by Google App Engine.

http://spreadsheets.google.com/pub?key=pRJ_0hajVrhacLjp3HqD5ew

refer to Google list here as follows;

http://groups.google.com/group/google-appengine-java/web/will-it-play-in-app-engine?pli=1

Grail for Google App Engine.

http://grails.org/plugin/app-engine

I will posting more info when I did try on it.

Google App Engine supports Java now.

http://code.google.com/intl/zh-TW/appengine/docs/java/gettingstarted/

You can download Eclipse plug-in as well.