引用原站的说明:

Google Web Toolkit (GWT) is a Java software development framework that makes writing AJAX applications like Google Maps and Gmail easy for developers who don't speak browser quirks as a second language. Writing dynamic web applications today is a tedious and error-prone process; you spend 90% of your time working around subtle incompatibilities between web browsers and platforms, and JavaScript's lack of modularity makes sharing, testing, and reusing AJAX components difficult and fragile.

GWT lets you avoid many of these headaches while offering your users the same dynamic, standards-compliant experience. You write your front end in the Java programming language, and the GWT compiler converts your Java classes to browser-compliant JavaScript and HTML.  

参考文档/资料:
[URL=http://code.google.com/webtoolkit/download.html]Download Google Web Toolkit (GWT) [/URL](开发包下载)

[URL=http://code.google.com/webtoolkit/documentation/examples/]Featured Example Projects[/URL] (例子,开发包里已经包含了)

[URL=http://soft.yesky.com/272/2537772.shtml]使用GWT开发AJAX应用程序[/URL] (一步步教你使用Intellij IDEA及ANT开发GWT实例)

[URL=http://www.jetbrains.com/idea/training/demos/GWT.html]Google Web Toolkit as 1-2-3[/URL](Intellij IDEA DEMO,来自Intellij IDEA网站上的实例,Flash动画,有配音,English version)