guokehua@yahoo.com.cn J Web 1.0&Web 2.0 Web 2.0 Asynchronous browser client user interfa Ajax web application model (asynchronous) Java Script call HTML+CSS data client UI browser t Ajax engine I r activity Ajax engine Http request I dent'-sde processing http(s)transport XML data time web and/or XML server processing processng server tores, backend processing, server-side systems Ajax web application model 郭克华J2EE框架实战教学视频J guokehua@yahoo.com.cn 郭克华J2EE框架实战教学视频 Web 1.0 & Web 2.0 Web 1.0 & Web 2.0 Web 2.0 Asynchronous