Preparation:
read the document of GWT and understand the basic knowledge of GWT:
http://code.google.com/webtoolkit/doc/1.6/tutorial/index.html
Setup (BY eclipse plugin):
1. install gwt eclipse plugin:
refer to http://code.google.com/eclipse/docs/getting_started.html
2. download the ext-gwt
http://www.sencha.com/products/gwt/download.php
3. upzip the zip package and follow the steps of "setup.txt"
4. test a ext component
1) add "GridExample" and relevant classes to the new created demo project.
2) create it in the entry point class
3) start up server and test it
Setup (BY maven):
refer to: http://www.sencha.com/learn/Tutorial:GWT_GXT_and_Maven_howto
Integrate with Spring:
refer to: http://code.google.com/p/spring4gwt/wiki/SimpleRPCExample
http://spring4gwt.googlecode.com/svn/trunk/src/main/java/org/spring4gwt/server/SpringGwtRemoteServiceServlet.java