GWT的项目经理，在其自己的可重复使用的包装

代码说明：

gwitbus makes GWT’s built-in Handler Manager and associated classes available to non-GWT projects. The Handler Manager provides an event bus that, in GWT projects, decouples both the GUI from the back-end, and bits of the GUI from each other. gwitbus takes the (latest) source from google web toolkit"s com.google.gwt.event.shared package, and bundles it up into its own jar. You can then use those classes in any Java application, e.g. a Swing application, as shown in the example code.