如何在QApplication富客户机中使用Qt初始化TeamCenter

Question

1. 我可以使用GUI独立运行"HelloWorld1“Qt应用程序。

1. 我可以运行"HelloWorld2“团队中心插件(通过Eclipse)继承的ViewPart。

1. 尝试在插件中插入QApplication，如下所示： 公共类MyComView扩展了ViewPart {ViewPart{静态{ //尝试插入qtjambi // System.out.println("QQ==before load qtjambi")；// QApplication qap1 = QApplication.instance()；// System.out.println("QQ==after获取实例“)；}//.}

我的代码是很好的编译和链接。但是，下面的堆栈跟踪有一个java.lang.ClassNotFoundException错误：

!STACK 0
java.lang.NoClassDefFoundError: com/trolltech/qt/gui/QApplication
    at com.mycom.myview.views.MyComView.<clinit>(MyComView.java:89)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:170)
    at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:874)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
    at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:267)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:263)
    at org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:63)
    at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:324)
    at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226)
    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
    at org.eclipse.ui.internal.Perspective.showView(Perspective.java:2228)
    at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1067)
    at org.eclipse.ui.internal.WorkbenchPage$20.run(WorkbenchPage.java:3816)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3813)
    at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3789)
    at com.cals.testplugin2.handlers.CallMyViewPart.execute(CallMyViewPart.java:26)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:294)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
    at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
    at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)
    at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:770)
    at org.eclipse.ui.menus.CommandContributionItem.access$10(CommandContributionItem.java:756)
    at org.eclipse.ui.menus.CommandContributionItem$5.handleEvent(CommandContributionItem.java:746)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3880)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3473)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at com.teamcenter.rac.aifrcp.Application.runApplication(Unknown Source)
    at com.teamcenter.rac.aifrcp.Application.start(Unknown Source)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    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:559)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: java.lang.ClassNotFoundException: com.trolltech.qt.gui.QApplication
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:489)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:405)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:393)
    at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
    ... 59 more

我做错什么了？如何在Eclipse中正确地使用Qt，特别是在Teamcenter插件中？

Answer 1

引发java.lang.NoClassDefFoundError的原因有几个。代码编译得很好，但在运行时抛出异常。

如果您从.jar文件中的命令行运行它，那么它可能没有在jar文件的清单中列出。

如果您在Eclipse中运行它，请检查类路径，或者确保类可以在工作目录中找到。

com/trolltech/qt/gui/QApplication依赖于本机libary代码，因此请确保您的类路径或工作目录具有Qt本机库。