1.jsp后台管理页面在MyEclipse中打开出现一下错误，我快晕了，大家快帮帮忙！

Question

1.jsp后台管理页面在MyEclipse中打开出现一下错误，我快晕了，java.lang.RuntimeException: DOMCoordinator#createDesignNodeFromSource: Node type DOCUMENT_TYPE_NODEnot supported.
at com.genuitec.eclipse.webdesigner3.DOMCoordinator.createDesignNodeFromSource(DOMCoordinator.java:563)
at com.genuitec.eclipse.webdesigner3.DOMCoordinator.buildDesignDOMChildren(DOMCoordinator.java:437)
at com.genuitec.eclipse.webdesigner3.DOMCoordinator.buildDesignDOMChildren(DOMCoordinator.java:459)
at com.genuitec.eclipse.webdesigner3.DOMCoordinator.buildDesignDOMfromSource(DOMCoordinator.java:422)
at com.genuitec.eclipse.webdesigner3.DOMCoordinator.synchronizeDOMsFromSource(DOMCoordinator.java:192)
at com.genuitec.eclipse.webdesigner3.design.DesignEditSystem.synchronize(DesignEditSystem.java:169)
at com.genuitec.eclipse.webdesigner3.AbstractEditSystem.setSynchronized(AbstractEditSystem.java:24)
at com.genuitec.eclipse.webdesigner3.WebDesigner3.setSynchronized(WebDesigner3.java:113)
at com.genuitec.eclipse.webdesigner3.editors.WebDesignerMultiPageEditor.checkSynchronization(WebDesignerMultiPageEditor.java:943)
at com.genuitec.eclipse.webdesigner3.editors.WebDesignerMultiPageEditor.access$6(WebDesignerMultiPageEditor.java:939)
at com.genuitec.eclipse.webdesigner3.editors.WebDesignerMultiPageEditor$10.run(WebDesignerMultiPageEditor.java:912)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at com.genuitec.eclipse.webdesigner3.editors.WebDesignerMultiPageEditor.designPageChange(WebDesignerMultiPageEditor.java:910)
at com.genuitec.eclipse.webdesigner3.editors.WebDesignerMultiPageEditor.pageChange(WebDesignerMultiPageEditor.java:884)
at org.eclipse.ui.part.MultiPageEditorPart.setActivePage(MultiPageEditorPart.java:973)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:314)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661)
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.EditorAreaHelper.setVisibleEditor(EditorAreaHelper.java:263)
at org.eclipse.ui.internal.EditorManager.setVisibleEditor(EditorManager.java:1410)
at org.eclipse.ui.internal.EditorManager$5.runWithException(EditorManager.java:944)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$27.runWithException(Workbench.java:1361)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2293)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
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:386)
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:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)2.另外一个页面出现这样的问题
HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause java.lang.NullPointerException
org.apache.jsp.admin.user.UserManage_jsp._jspService(UserManage_jsp.java:138)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.10 logs.哪位大侠知道麻烦QQ告诉我好吗？ 小的刚学，忘大侠指点

Answer 1

1、绝招，重启MyEclipse
2、如果不灵的话就试试在文件上点右键 -> Open With -> MyEclipse JSP Editor，或其他的几项试试，或者用Text Editor打开，看一下有没有什么错误

Answer 2

右键myeclipse->exclude from validation;
原因在查中。。

Answer 3

我猜大概是Myeclipse中的某项和jsp中的某个标签不兼容的关系

Answer 4

我猜大概是Myeclipse中的某项和jsp中的某个标签不兼容的关系

Answer 5

我猜大概是Myeclipse中的某项和jsp中的某个标签不兼容的关系  或jsp代码写不有问题 
500 这中情况出现 很多出错的地方都可能导致这个问题 确定不了 

Answer 6

description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: java.lang.NullPointerException 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532) 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426) 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
这个可能是jsp提交的事件在 ACtion 中没有定义.