解决myeclipse错误：Could not create the view: An unexpected exception was thrown.

报错信息如下：

    at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.loadFromPreferences(Unknown Source)    at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.init(Unknown Source)    at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.<init>(Unknown Source)    at com.genuitec.eclipse.ast.deploy.core.DeploymentManager.getDefault(Unknown Source)    at com.genuitec.eclipse.ast.deploy.core.ui.ServerTreeViewer$ServerTreeContentProvider.inputChanged(Unknown Source)    at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:276)    at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690)    at com.genuitec.eclipse.ast.deploy.core.ui.ServerTreeViewer.<init>(Unknown Source)    at com.genuitec.eclipse.ast.deploy.core.ui.ServerView.createPartControl(Unknown Source)    at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:375)    at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:229)    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)    at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)    at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:534)    at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)    at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)    at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)    at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)    at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1245)    at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1198)    at org.eclipse.ui.internal.PartStack.presentationSelectionChanged(PartStack.java:834)    at org.eclipse.ui.internal.PartStack.access$1(PartStack.java:823)    at org.eclipse.ui.internal.PartStack$1.selectPart(PartStack.java:137)    at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:133)    at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:269)    at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:278)    at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)    at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$2.handleEvent(DefaultTabFolder.java:88)    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)    at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)    at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:2746)    at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1433)    at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:257)    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)    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:344)    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    at java.lang.reflect.Method.invoke(Method.java:597)    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)

解决办法：打开myeclipse的工作空间，搜索com.genuitec.eclipse.ast.deploy.core，找到文件com.genuitec.eclipse.ast.deploy.core.prefs，用记事本打开后是tomcat的运行项目的配置信息，把它删除后，重新打开myeclipse即可。