无法在 Eclipse 中创建新的 GWT 项目

Question

我到处寻找解决方案，但找不到任何对我有用的东西。

我有 Eclipse Oxygen 并安装了 GWT 插件（取自 Eclipse Marketplace）。 当我尝试创建新的 GWT 项目时，提供项目名称和包名称并取消勾选（这很重要，因为勾选了此选项，项目正在创建但仍然无法工作）“生成项目示例代码”并单击完成我已经收到错误消息“创建元素失败。有关详细信息，请参阅错误日志”

我有以下错误：

插件：org.eclipse.jdt.ui

消息：内部错误

错误信息：

java.lang.reflect.InvocationTargetException
    at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:398)
    at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:980)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard.performFinish(NewElementWizard.java:136)
    at com.google.gdt.eclipse.suite.wizards.NewWebAppProjectWizard.performFinish(NewWebAppProjectWizard.java:115)
    at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:778)
    at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:417)
    at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:619)
    at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:81)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
    at org.eclipse.jface.window.Window.open(Window.java:794)
    at com.google.gdt.eclipse.core.actions.AbstractOpenWizardAction.run(AbstractOpenWizardAction.java:103)
    at com.google.gdt.eclipse.suite.actions.NewWebAppToolbarHandler.execute(NewWebAppToolbarHandler.java:26)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:291)
    at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:92)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:239)
    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:487)
    at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
    at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:431)
    at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:446)
    at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:472)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
    at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
    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(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
Caused by: java.lang.NullPointerException
    at com.google.gwt.eclipse.core.launch.LegacyGWTLaunchShortcutStrategy.getShell(LegacyGWTLaunchShortcutStrategy.java:110)
    at com.google.gwt.eclipse.core.launch.LegacyGWTLaunchShortcutStrategy.generateUrl(LegacyGWTLaunchShortcutStrategy.java:130)
    at com.google.gdt.eclipse.suite.launch.WebAppLaunchUtil.determineStartupURL(WebAppLaunchUtil.java:139)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.createLaunchConfig(WebAppProjectCreator.java:558)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.create(WebAppProjectCreator.java:372)
    at com.google.gdt.eclipse.suite.wizards.NewWebAppProjectWizard.finishPage(NewWebAppProjectWizard.java:139)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard$2.run(NewElementWizard.java:120)
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5660)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:105)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Root exception:
java.lang.NullPointerException
    at com.google.gwt.eclipse.core.launch.LegacyGWTLaunchShortcutStrategy.getShell(LegacyGWTLaunchShortcutStrategy.java:110)
    at com.google.gwt.eclipse.core.launch.LegacyGWTLaunchShortcutStrategy.generateUrl(LegacyGWTLaunchShortcutStrategy.java:130)
    at com.google.gdt.eclipse.suite.launch.WebAppLaunchUtil.determineStartupURL(WebAppLaunchUtil.java:139)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.createLaunchConfig(WebAppProjectCreator.java:558)
    at com.google.gdt.eclipse.suite.wizards.WebAppProjectCreator.create(WebAppProjectCreator.java:372)
    at com.google.gdt.eclipse.suite.wizards.NewWebAppProjectWizard.finishPage(NewWebAppProjectWizard.java:139)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard$2.run(NewElementWizard.java:120)
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5660)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:105)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)

会话数据：

eclipse.buildId=4.7.2.M20171130-0510
java.version=1.8.0_151
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=pl_PL
Framework arguments:  -product org.eclipse.epp.package.jee.product -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product -data file:/E:/eclipse-workspace/ -product org.eclipse.epp.package.jee.product

知道我的日食有什么问题吗？我尝试重新安装，但到目前为止没有运气

谢谢

Answer 1

这是一个GWT Eclipse 插件的已知问题：Issue #351 - Unable to create new project。

不幸的是，它仍然是打开的。作为一种解决方法，您可以尝试修复生成的示例的问题（至少，只需删除除具有空入口点的模块之外的所有代码）。或者使用 Maven/Gradle 作为项目的起点。

Answer 2

如http://www.gwtproject.org/gettingstarted.html 所述，使用命令行实用程序 webAppCreator 创建项目。它生成文件以启动 GWT 项目。应该为此下载 GWT SDK。运行命令行参数也需要 Apache Ant。请设置 ANT_HOME 环境变量并附加 Path 指向 bin 目录。将项目导入 Eclipse。