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Comparing the Google Web Toolkit to Echo2

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不久之前,Google发布了它们的一款Web开发Framework,Google Web Toolkit,其核心思想是允许开发人员使用Java的语法和类库创建Web程序,然后使用Java to JavaScript的编译器把Java代码转换成JavaScript代码,并在浏览器中运行。Gmail就是用这种形式开发出来的。马上,有些人就开始高呼:“这真是革命性的创新啊!”。然而,一种新方法的好坏,要看它与率先出来的方法的比较。最近,很多人都把GWT和Echo2做比较。这些比较中,有些比较客观,有些则略显偏颇。于是,Echo2的领导者Tod Liebeck在TSS上发表了自己对这种比较的看法。

GWT和Echo2的最大区别在于:GWT以JavaScript的形式运行在客户端,而Echo2以Java bytecode的形式运行在服务器端。GWT直接在浏览器中处理所有的操作,而Echo2则以AJAX的方式与Server进行通信。这应该是选择这两种框架时需要仔细考虑的方面。

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