KevinGong

2篇文章介紹Google Web Toolkit?

	面向 Java 開發(fā)人員的 Ajax: 使用 Google Web Toolkit 開發(fā) Ajax：GWT(Google Web Toolkit) 是 Google 最近推出的一個開發(fā) Ajax 應(yīng)用的框架，它支持用 Java 開發(fā)和調(diào)試 Ajax 應(yīng)用，本文主要介紹如何利用 GWT 進行 Ajax 的開發(fā)。
	面向 Java 開發(fā)人員的 Ajax: Google Web Toolkit 入門：Ajax 被用于創(chuàng)建更加動態(tài)和交互性更好的 Web 應(yīng)用程序。Google Web Toolkit （簡稱 GWT） 是 Google 推出的 Ajax 應(yīng)用開發(fā)包，GWT 支持開發(fā)者使用 Java 語言開發(fā) Ajax 應(yīng)用。本文將介紹 GWT 開發(fā) Ajax 應(yīng)用的基本方法和步驟。

goolipse安裝和使用：
googlipse插件：http://sourceforge.net/projects/googlipse

Requirements:

?Googlipse requires Eclipse 3.2 （必須3.2）with WebTools Platform 1.5（一定要裝,）running on a Java 1.5 VM. You need to separately install Google Web Toolkit from :http://code.google.com/webtoolkit/download.html

Installation:

?(*) Drop the com.googlipse.gwt_<version>.jar file in your eclipse\plugins folder
?(*) Open Eclipse. Select Window->Preferences->Googlipse and set GWT home to the directory where you have installed the Google Web Toolkit.
?(*) You are all set to code.
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Adding Googlipse to your project:

?Googlipse is implemented as a WTP Facet. When creating a new Dynamic Web Project, select Googlipse in the Project Facets page. If you already have a Dynamic Web Project, you can add Googlipse facet by selecting Project->Properties->Project Facets(Please make sure you don't have gwt-user.jar in your classpath). In case you didn't like Googlipse, you can remove the facet.

Creating a Module:

?Once you have a Dynamic Web Project with Googlipse facet, you can add a new module by File->New->Other->Googlipse->Gwt Module. Modules can be created only in valid java packages (default package is not allowed). Either you can type in the package (with project & source folder) in the location field or you can select it by clicking Browse button. You can also click the Create button to create a new package. Next type in the name of the module. Click Finish, you will have all the artifacts for the module generated.
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Adding a Remote Service;

?Note :A Remote Service will be created only in a module. So if you don't have a module, you need to create one using the New Module wizard, before this step.
?You can select File->New->Other->Googlipse->Gwt Remote Service. Click the Browse button and select the module (the gwt.xml file). Type the name and uri for the service and click Finish. Now the artifacts for the remote service will be generated. (You have to add an entry in the gwt.xml file manually. Googlipse doesn't add it. This feature will be implemented in future versions)
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Adding a Remote Service method:

?You can open the RemoteService interface and add/change methods in it. You need to provide the implementation of those methods in RemoteServiceImpl class, but thanks to Googlipse, you don't have to do anything in RemoteServiceAsync. Googlipse will automatically update the corresponding Async file whenever a RemoteService interface is changed.
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Calling a method using Remote Service:

?The utility class in the Remote service should help you in making the remote call.
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?MyRemoteServiceAsync async = MyRemoteService.Util.getInstance();
?async.makeRemoteCall(param1, param2, callback);
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Running/Debugging a Gwt Application:

?Select Run->Run/Debug to activate the Lauch configuration dialog box. Double Click "Gwt Application". In the main page, you can select the Project & Module you want to run. In the parameters page you can select the parameters such as port and log level. Click Run to execute the GwtShell & bring up your application. The laucher will add the jar files & all the source folders in the project to your application.
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Questions/Bugs/Suggestions?

?Drop a mail to googlipse-users@lists.sourceforge.net