tomcat报错org.apache.struts.action.ActionServlet cannot be cast to javax.servlet

Question

严重: Servlet /test threw load() exception
java.lang.ClassCastException: org.apache.struts.action.ActionServlet cannot be cast to javax.servlet.Servlet
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1116)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2012-1-10 9:49:57 org.apache.catalina.core.ApplicationContext log信息: Marking servlet jsp as unavailable
2012-1-10 9:49:57 org.apache.catalina.core.StandardContext loadOnStartup
examples
2012-1-10 9:50:00 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2012-1-10 9:50:00 org.apac
严重: Servlet /test threw load() exception
java.lang.ClassCastException: org.apache.jasper.servlet.JspServlet cannot be cast to javax.servlet.Servlet
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1116)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2012-1-10 9:49:57 org.apache.tomcat.util.modeler.Registry registerComponent严重: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/test,J2EEApplication=none,J2EEServer=none
2012-1-10 9:49:57 org.apache.catalina.startup.HostConfig deployWAR
信息: Deploying web application archive axis2.war
[INFO] Clustering has been disabled
[INFO] Deploying module: addressing-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/addressing-1.5.1.mar
[INFO] Deploying module: jaxws-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/axis2-jaxws-mar-1.5.1.mar
[INFO] Deploying module: script-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/axis2-scripting-1.5.1.mar
[INFO] Deploying module: metadataExchange-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/mex-1.5.1.mar
[INFO] Deploying module: mtompolicy-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/mtompolicy-1.5.1.mar
[INFO] Deploying module: ping-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/ping-1.5.1.mar
[INFO] Deploying module: soapmonitor-1.5.1 - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/modules/soapmonitor-1.5.1.mar
[INFO] Deploying module: metadataExchange-1.5.1-impl - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/lib/mex-1.5.1-impl.jar
[INFO] Deploying Web service: version-1.5.1.aar - file:/D:/apache-tomcat-6.0.29/webapps/axis2/WEB-INF/services/version-1.5.1.aar
2012-1-10 9:49:59 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory docs
2012-1-10 9:49:59 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory he.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2012-1-10 9:50:00 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory myapp
2012-1-10 9:50:00 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory ROOT
2012-1-10 9:50:00 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2012-1-10 9:50:00 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2012-1-10 9:50:00 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/62  config=null
2012-1-10 9:50:00 org.apache.catalina.startup.Catalina start
信息: Server startup in 4094 ms菜鸟学struts，写logindemo的时候出现红色标记的报错，另外启动tomcat之后localhost:8080和127.0.0.1都进不到tomcat的欢迎页面
求指点

Answer 1

java.lang.ClassCastException: org.apache.struts.action.ActionServlet cannot be cast to javax.servlet.Servle应该是你代码中有什么强制类型转换错了？

Answer 2

java.lang.ClassCastException: org.apache.struts.action.ActionServlet cannot be cast to javax.servlet.Servlet关键错误信息是这行，ActionServlet不能被映像成Servlet
看你在什么地方把ActionServlet对象当Servlet对象用了

Answer 3

出现强制类型转换的只有loginAction中了
public class LoginAction extends Action { @Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

LoginForm loginForm = (LoginForm)form;
if(loginForm.getUsername().equals("shenlichao")){
return mapping.findForward("loginSuccess");
}else{
return mapping.findForward("loginFailure");
}

}
}
转换的是loginForm也不是servlet呀  还是不解

Answer 4

一共就写了LoginForm和LoginAction两段代码，都没有ActionServlet出现过。。

Answer 5

我重新装了tomcat并部署好项目启动后报错
严重: Begin event threw exception
java.lang.ClassNotFoundException: org.apache.catalina.loader.DevLoader
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205)
at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1356)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
at org.apache.catalina.startup.ContextConfig.processContextConfig(ContextConfig.java:793)
at org.apache.catalina.startup.ContextConfig.contextConfig(ContextConfig.java:736)
at org.apache.catalina.startup.ContextConfig.init(ContextConfig.java:1018)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:279)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.StandardContext.init(StandardContext.java:5667)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4415)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2012-1-10 14:18:37 org.apache.catalina.startup.ContextConfig processContextConfig
严重: Parse error in context.xml for /strutstest
java.lang.ClassNotFoundException: org.apache.catalina.loader.DevLoader
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2806)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2832)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1359)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
at org.apache.catalina.startup.ContextConfig.processContextConfig(ContextConfig.java:793)
at org.apache.catalina.startup.ContextConfig.contextConfig(ContextConfig.java:736)
at org.apache.catalina.startup.ContextConfig.init(ContextConfig.java:1018)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:279)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.StandardContext.init(StandardContext.java:5667)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4415)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2012-1-10 14:18:37 org.apache.catalina.startup.ContextConfig processContextConfig