MyEclipse Struts Config Editor默认打开*.xml异常情况解决

用myeclipse7.5 打开*.xml 默认使用MyEclipse Struts Config Editor的时候出错。

详细如下：

org.eclipse.ui.PartInitException: Unable to open editor, unknown editor ID: org.xmen.ui.text.XMLTextEditor
	at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:634)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2817)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2729)
	at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2721)
	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2673)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2652)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2635)
	at com.genuitec.eclipse.struts.editor.multipage.StrutsConfigEditor.init(StrutsConfigEditor.java:472)
	at org.eclipse.ui.internal.EditorManager.createSite(EditorManager.java:799)
	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:643)
	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:428)
	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:594)
	at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:306)
	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:1256)
	at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)
	at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1608)
	at org.eclipse.ui.internal.PartStack.add(PartStack.java:499)

碰到这种情况，只要找到该目录，打开.project文件，编辑最后一行，找到<natures>结点，增加一条<nature>com.genuitec.eclipse.cross.easystruts.eclipse.easystrutsnature</nature>就行了。