我使用Eclipse GWT插件创建了一个示例GWT Web应用程序，它可以完美运行。
但是当我尝试添加新模块时，
什么也没发生-向导继续保留在同一页面上!
接下来，我复制粘贴了我正在使用的Web应用程序的包/目录结构，并手动对
NewModule.gwt.xml及其内容进行了适当的更改；我还适当地更改了Java类名，并刷新了Eclipse项目。但是，现在，当我在项目上运行GWT Compile时(通过在Eclipse中右键单击该项目)，它仅编译原始的webapp，而完全忽略了我在文件系统上手动创建的
NewModule模块。问题:
我在Ubuntu 16.04上将GWT 2.8.0与Eclipse Neon一起使用。也尝试了GWT 2.7.0，具有与上述相同的行为。
最佳答案
我可以重现这一点。值得庆幸的是，记录了一个事件，它将为我们提供一些想法:
Plug-in: org.eclipse.ui
Serverity: Error
Message: Unhandled event loop exception
java.lang.ClassCastException: org.eclipse.jdt.internal.core.JarEntryFile cannot be cast to org.eclipse.core.resources.IFile
at com.google.gwt.eclipse.core.modules.AbstractModule.getShortName(AbstractModule.java:294)
at com.google.gwt.eclipse.core.modules.AbstractModule.getQualifiedName(AbstractModule.java:272)
at com.google.gwt.eclipse.core.modules.ModuleJarResource.getQualifiedName(ModuleJarResource.java:1)
at com.google.gwt.eclipse.core.modules.AbstractModule.getSimpleName(AbstractModule.java:342)
at com.google.gwt.eclipse.core.modules.ModuleJarResource.getSimpleName(ModuleJarResource.java:1)
at com.google.gwt.eclipse.core.modules.ModuleUtils$3.visit(ModuleUtils.java:220)
at com.google.gwt.eclipse.core.modules.ModuleUtils$3.visit(ModuleUtils.java:1)
at com.google.gwt.eclipse.core.modules.ModuleUtils.visitFragments(ModuleUtils.java:338)
at com.google.gwt.eclipse.core.modules.ModuleUtils.findModule(ModuleUtils.java:212)
at com.google.gwt.eclipse.core.wizards.NewModuleWizardPage.addCommonGWTModulesAsDefaultInherits(NewModuleWizardPage.java:367)
at com.google.gwt.eclipse.core.wizards.NewModuleWizardPage.moduleContainerChanged(NewModuleWizardPage.java:496)
at com.google.gwt.eclipse.core.wizards.NewModuleWizardPage.doFieldChange(NewModuleWizardPage.java:291)
at com.google.gwt.eclipse.core.wizards.NewModuleWizardPage.handleFieldChanged(NewModuleWizardPage.java:322)
at org.eclipse.jdt.ui.wizards.NewContainerWizardPage.containerDialogFieldChanged(NewContainerWizardPage.java:319)
at org.eclipse.jdt.ui.wizards.NewContainerWizardPage.access$1(NewContainerWizardPage.java:314)
at org.eclipse.jdt.ui.wizards.NewContainerWizardPage$ContainerFieldAdapter.dialogFieldChanged(NewContainerWizardPage.java:300)
at org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField.dialogFieldChanged(DialogField.java:75)
at org.eclipse.jdt.internal.ui.wizards.dialogfields.StringDialogField.setText(StringDialogField.java:180)
at org.eclipse.jdt.ui.wizards.NewContainerWizardPage.setPackageFragmentRoot(NewContainerWizardPage.java:470)
at org.eclipse.jdt.ui.wizards.NewContainerWizardPage.initContainerPage(NewContainerWizardPage.java:163)
at com.google.gwt.eclipse.core.wizards.NewModuleWizardPage.initModulePage(NewModuleWizardPage.java:328)
at com.google.gwt.eclipse.core.wizards.NewModuleWizard.addPages(NewModuleWizard.java:55)
at org.eclipse.jface.wizard.WizardSelectionPage.getNextPage(WizardSelectionPage.java:116)
at org.eclipse.ui.internal.dialogs.WorkbenchWizardSelectionPage.getNextPage(WorkbenchWizardSelectionPage.java:98)
at org.eclipse.jface.wizard.WizardDialog.nextPressed(WizardDialog.java:869)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:419)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:618)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5219)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4553)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4143)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
at org.eclipse.jface.window.Window.open(Window.java:794)
at org.eclipse.ui.internal.handlers.WizardHandler$New.executeHandler(WizardHandler.java:269)
at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:290)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:295)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:282)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:264)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:488)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:353)
at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:155)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5219)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4553)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4143)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
at org.eclipse.equinox.launcher.Main.main(Main.java:1492)
其次是:
Session Data:
eclipse.buildId=4.6.1.M20160907-1200
java.version=1.8.0_112
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.jee.product --launcher.GTK_version 2
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.jee.product --launcher.GTK_version 2
This is a continuation of log file /home/user/workspace/.metadata/.bak_0.log
Created Time: 2017-05-02 11:19:21.409
在我的情况下，该
.bak_0.log中没有什么有趣的/新的。我已将其报告给Eclipse，并且还记录了354的问题gwt-eclipse-plugin编辑:当然，这并不能回答您的真正问题，我也将看看是否可以帮助您。
编辑2:
由于您已经手动添加了模块，因此我将假定IDE集成对此一无所知。右键单击您的项目，转到GWT，然后从展开菜单中选择“设置”，而不是进行编译。您在对话框中看到新模块了吗？如果没有，请添加它，然后查看GWT Compile是否开始为您工作。
关于命令行，请参考webAppCreator documentation。
编辑3:
好的，现在我无法重现您的行为。我再次开始演示代码，然后复制它，以便在同一项目中有2个模块。它们不会互相继承或继承任何东西-暂存引用scratch / scratch2引用scratch2。我没有创建另一个HTML文件来引用第二个模块。所以这是我的设置:
./src/scratch/server/GreetingServiceImpl.java
./src/scratch/shared/FieldVerifier.java
./src/scratch/client/Scratch_gwt.java
./src/scratch/client/GreetingService.java
./src/scratch/client/GreetingServiceAsync.java
./src/scratch/Scratch_gwt.gwt.xml
./src/scratch2/server/GreetingService2Impl.java
./src/scratch2/shared/FieldVerifier2.java
./src/scratch2/client/GreetingService2Async.java
./src/scratch2/client/Scratch2_gwt.java
./src/scratch2/client/GreetingService2.java
./src/scratch2/Scratch2_gwt.gwt.xml
我不知道它是否相关(有点怀疑)，但我也修改了我的web.xml:
<servlet>
<servlet-name>greetServlet</servlet-name>
<servlet-class>scratch.server.GreetingServiceImpl</servlet-class>
</servlet>
<servlet>
<servlet-name>greetServlet2</servlet-name>
<servlet-class>scratch2.server.GreetingService2Impl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>greetServlet</servlet-name>
<url-pattern>/scratch_gwt/greet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>greetServlet2</servlet-name>
<url-pattern>/scratch_gwt/greet2</url-pattern>
</servlet-mapping>
当我右键单击我的scratch-gwt项目并转到GWT |编译，我有:
Project: scratch-gwt
Log level: Info
Ouput style: Obfuscated
Entry Point Modules
Scratch_gwt - scratch
Scratch2_gwt - scratch2
我确实必须在此处添加Scratch2_gwt入口点。和我的编译输出:
Compiling module scratch.Scratch_gwt
Compiling 5 permutations
Compiling permutation 0...
Compiling permutation 1...
Compiling permutation 2...
Compiling permutation 3...
Compiling permutation 4...
Compile of permutations succeeded
Compilation succeeded -- 11.274s
Linking into /home/user/workspace/scratch-gwt/war/scratch_gwt
Link succeeded
Linking succeeded -- 0.180s
Compiling module scratch2.Scratch2_gwt
Compiling 5 permutations
Compiling permutation 0...
Compiling permutation 1...
Compiling permutation 2...
Compiling permutation 3...
Compiling permutation 4...
Compile of permutations succeeded
Compilation succeeded -- 7.821s
Linking into /home/user/workspace/scratch-gwt/war/scratch2_gwt
Link succeeded
Linking succeeded -- 0.109s
因此，我只能说确实可以做到这一点。重新整理您的编译设置，然后从头开始一个新项目以重试，或者发布一些配置。