使用JBoss Tools插件打开.ftl文件时发生Eclipse错误-从插件调用代码时出现问题："；org.eclipse.ui.workbench“；

我只是下载并安装Eclipse（开普勒）4.3.2 ，然后在帮助>Eclipse Marketplace…中安装JBoss工具（仅安装Freemarker IDE），如下链接：

eclipse打开.ftl文件时出错

活动详情：

消息：从插件“org.eclipse.ui.workbench”调用代码时出现问题

异常堆栈跟踪：

java.lang.NullPointerException
at org.jboss.ide.eclipse.freemarker.model.ItemSet.<init>(ItemSet.java:56)
at org.jboss.ide.eclipse.freemarker.editor.Editor.getItemSet(Editor.java:277)
at org.jboss.ide.eclipse.freemarker.outline.OutlineContentProvider.getElements(OutlineContentProvider.java:63)
at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:1010)
at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:721)
at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1351)
at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391)
at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:917)
at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:620)
at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:820)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:797)
at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:644)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:768)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1548)
at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:833)
at org.eclipse.jface.viewers.AbstractTreeViewer$5.run(AbstractTreeViewer.java:1532)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443)
at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404)
at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1525)
at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280)
at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690)
at org.jboss.ide.eclipse.freemarker.outline.OutlinePage.createControl(OutlinePage.java:86)
at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:137)
at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:412)
at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:753)
at org.eclipse.ui.part.PageBookView$4.partActivated(PageBookView.java:1055)
at org.eclipse.ui.internal.WorkbenchPage$15.run(WorkbenchPage.java:4794)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4792)
at org.eclipse.ui.internal.WorkbenchPage.access$16(WorkbenchPage.java:4772)
at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:194)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$2.run(PartServiceImpl.java:192)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:190)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:609)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:553)
at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:104)
at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:59)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1453)
at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1416)
at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2856)
at org.eclipse.swt.widgets.Widget.wmSetFocus(Widget.java:2421)
at org.eclipse.swt.widgets.Control.WM_SETFOCUS(Control.java:5235)
at org.eclipse.swt.widgets.Canvas.WM_SETFOCUS(Canvas.java:457)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4681)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
at org.eclipse.swt.internal.win32.OS.SetFocus(Native Method)
at org.eclipse.swt.widgets.Control.forceFocus(Control.java:1098)
at org.eclipse.swt.widgets.Control.setSavedFocus(Control.java:3620)
at org.eclipse.swt.widgets.Decorations.restoreFocus(Decorations.java:838)
at org.eclipse.swt.widgets.Decorations.WM_SETFOCUS(Decorations.java:1782)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4681)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:498)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:826)
at org.eclipse.jface.window.Window.open(Window.java:802)
at org.eclipse.ui.internal.views.log.EventDetailsDialog.open(EventDetailsDialog.java:180)
at org.eclipse.ui.internal.views.log.EventDetailsDialogAction.run(EventDetailsDialogAction.java:98)
at org.eclipse.ui.internal.views.log.LogView$15.doubleClick(LogView.java:536)
at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:845)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:843)
at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1477)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1246)
at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:249)
at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:246)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:307)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)

java.lang.NullPointerException
位于org.jboss.ide.eclipse.freemarker.model.ItemSet.（ItemSet.java:56）
位于org.jboss.ide.eclipse.freemarker.editor.editor.getItemSet（editor.java:277）
位于org.jboss.ide.eclipse.freemarker.outline.OutlineContentProvider.getElements（OutlineContentProvider.java:63）
位于org.eclipse.jface.viewers.StructuredViewer.getRawChildren（StructuredViewer.java:1010）
在org.eclipse.jface.viewers.ColumnViewer.getRawChildren（ColumnViewer.java:721）
位于org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren（AbstractTreeViewer.java:1351）
位于org.eclipse.jface.viewers.TreeViewer.getRawChildren（TreeViewer.java:391）
位于org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren（StructuredViewer.java:917）
在org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren上（AbstractTreeViewer.java:620）
位于org.eclipse.jface.viewers.AbstractTreeViewer$1.run（AbstractTreeViewer.java:820）
位于org.eclipse.swt.custom.BusyIndicator.showWhile（BusyIndicator.java:70）
位于org.eclipse.jface.viewers.AbstractTreeViewer.createChildren（AbstractTreeViewer.java:797）
位于org.eclipse.jface.viewers.TreeViewer.createChildren（TreeViewer.java:644）
位于org.eclipse.jface.viewers.AbstractTreeViewer.createChildren（AbstractTreeViewer.java:768）
位于org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree（AbstractTreeViewer.java:1548）
位于org.eclipse.jface.viewers.TreeViewer.internalInitializeTree（TreeViewer.java:833）
位于org.eclipse.jface.viewers.AbstractTreeViewer$5.run（AbstractTreeViewer.java:1532）
位于org.eclipse.jface.viewers.StructuredViewer.preservingSelection（StructuredViewer.java:1443）
在org.eclipse.jface.viewers.TreeViewer.preservingSelection上（TreeViewer.java:403）
位于org.eclipse.jface.viewers.StructuredViewer.preservingSelection（StructuredViewer.java:1404）
位于org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged（AbstractTreeViewer.java:1525）
位于org.eclipse.jface.viewers.ContentViewer.setInput（ContentViewer.java:280）
位于org.eclipse.jface.viewers.StructuredViewer.setInput（StructuredViewer.java:1690）
位于org.jboss.ide.eclipse.freemarker.outline.OutlinePage.createControl（OutlinePage.java:86）
在org.eclipse.ui.views.contentoutline.contentoutline.doCreatePage（contentoutline.java:137）上
在org.eclipse.ui.part.PageBookView.createPage（PageBookView.java:412）上
在org.eclipse.ui.part.PageBookView.partActivated上（PageBookView.java:753）
在org.eclipse.ui.part.PageBookView$4.partActivated（PageBookView.java:1055）
位于org.eclipse.ui.internal.WorkbenchPage$15.run（WorkbenchPage.java:4794）
位于org.eclipse.core.runtime.SafeRunner.run（SafeRunner.java:42）
位于org.eclipse.ui.internal.WorkbenchPage.firePartActivated（WorkbenchPage.java:4792）
在org.eclipse.ui.internal.WorkbenchPage.access$16（WorkbenchPage.java:4772）
位于org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated（WorkbenchPage.java:194）
位于org.eclipse.e4.ui.internal.workbench.partserviceinpl$2.run（partserviceinpl.java:192）
位于org.eclipse.core.runtime.SafeRunner.run（SafeRunner.java:42）
位于org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated（PartServiceImpl.java:190）
位于org.eclipse.e4.ui.internal.workbench.partserviceinpl.activate（partserviceinpl.java:609）
位于org.eclipse.e4.ui.internal.workbench.partserviceinpl.activate（partserviceinpl.java:553）
位于org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate（AbstractPartRenderer.java:104）
位于org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent（ContributedPartRenderer.java:59）
位于org.eclipse.swt.widgets.EventTable.sendEvent（EventTable.java:84）
位于org.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1057）
位于org.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1081）
位于org.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1066）
位于org.eclipse.swt.widgets.Shell.setActiveControl（Shell.java:1453）
位于org.eclipse.swt.widgets.Shell.setActiveControl（Shell.java:1416）
位于org.eclipse.swt.widgets.Control.sendFocusEvent（Control.java:2856）
位于org.eclipse.swt.widgets.Widget.wmSetFocus（Widget.java:2421）
位于org.eclipse.swt.widgets.Control.WM_SETFOCUS（Control.java:5235）
位于org.eclipse.swt.widgets.Canvas.WM_SETFOCUS（Canvas.java:457）
位于org.eclipse.swt.widgets.Control.windowProc（Control.java:4681）
位于org.eclipse.swt.widgets.Canvas.windowProc（Canvas.java:340）
位于org.eclipse.swt.widgets.Display.windowProc（Display.java:4977）
位于org.eclipse.swt.internal.win32.OS.SetFocus（本机方法）
位于org.eclipse.swt.widgets.Control.forceFocus（Control.java:1098）
位于org.eclipse.swt.widgets.Control.setSavedFocus（Control.java:3620）
位于org.eclipse.swt.widgets.Decorations.restoreFocus（Decorations.java:838）
位于org.eclipse.swt.widgets.Decorations.WM_SETFOCUS（Decorations.java:1782）
位于org.eclipse.swt.widgets.Control.windowProc（Control.java:4681）
位于org.eclipse.swt.widgets.Canvas.windowProc（Canvas.java:340）
位于org.eclipse.swt.widgets.Decorations.windowProc（Decorations.java:1627）
位于org.eclipse.swt.widgets.Shell.windowProc（Shell.java:2075）
位于org.eclipse.swt.widgets.Display.windowProc（Display.java:4977）
位于org.eclipse.swt.internal.win32.OS.DefWindowProcW（本机方法）
位于org.eclipse.swt.internal.win32.OS.DefWindowProc（OS.java:2544）
位于org.eclipse.swt.widgets.Shell.callWindowProc（Shell.java:498）
位于org.eclipse.swt.widgets.Control.windowProc（Control.java:4706）
位于org.eclipse.swt.widgets.Canvas.windowProc（Canvas.java:340）
位于org.eclipse.swt.widgets.Decorations.windowProc（Decorations.java:1627）
位于org.eclipse.swt.widgets.Shell.windowProc（Shell.java:2075）
在org.eclipse.swt.widg