异常问题，在网上找也没有找到答案

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">



<filter>

<filter-name>struts2filter</filter-name>

<filter-class>

org.apache.struts2.dispatcher.FilterDispatcher</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2filter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>



<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>







<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"

    "http://struts.apache.org/dtds/struts-2.1.dtd">



<struts>

<package namespace="/user" name="user-package" extends="dang-default">

<action name="regist" class="tarena.dang.actions.user.RegistFromAction">

<interceptor-ref name="hibernatetractionStack"/>

<result name="verify">/user/verify_form.jsp</result>

</action>

</package>

</struts>







出现的异常：

2010-5-26 17:39:26 org.apache.catalina.core.AprLifecycleListener init

信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Users\Action\AppData\Local\Genuitec\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin;C:\Program Files\Apache Software Foundation\Tomcat 6.0\bin

2010-5-26 17:39:26 org.apache.coyote.http11.Http11Protocol init

信息: Initializing Coyote HTTP/1.1 on http-8080

2010-5-26 17:39:26 org.apache.catalina.startup.Catalina load

信息: Initialization processed in 556 ms

2010-5-26 17:39:26 org.apache.catalina.core.StandardService start

信息: Starting service Catalina

2010-5-26 17:39:26 org.apache.catalina.core.StandardEngine start

信息: Starting Servlet Engine: Apache Tomcat/6.0.20

log4j:ERROR Could not find value for key log4j.appender.file

log4j:ERROR Could not instantiate appender named "file".

2010-5-26 17:39:31 org.apache.catalina.core.ApplicationContext log

信息: ContextListener: contextInitialized()

2010-5-26 17:39:31 org.apache.catalina.core.ApplicationContext log

信息: SessionListener: contextInitialized()

2010-5-26 17:39:31 org.apache.coyote.http11.Http11Protocol start

信息: Starting Coyote HTTP/1.1 on http-8080

2010-5-26 17:39:31 org.apache.jk.common.ChannelSocket init

信息: JK: ajp13 listening on /0.0.0.0:8009

2010-5-26 17:39:31 org.apache.jk.server.JkMain start

信息: Jk running ID=0 time=0/47  config=null

2010-5-26 17:39:31 org.apache.catalina.startup.Catalina start

信息: Server startup in 5365 ms

2010-5-26 17:39:51 org.apache.catalina.startup.HostConfig checkResources

信息: Reloading context [/dangdang]

2010-5-26 17:39:53 org.apache.catalina.core.StandardContext addApplicationListener

信息: The listener "com.sun.faces.util.ReflectionUtils$ReflectionUtilsListener" is already configured for this context. The duplicate definition has been ignored.

2010-5-26 17:39:53 org.apache.catalina.core.StandardContext addApplicationListener

信息: The listener "com.sun.faces.config.ConfigureListener" is already configured for this context. The duplicate definition has been ignored.

2010-5-26 17:39:53 org.apache.catalina.core.StandardContext addApplicationListener

信息: The listener "com.sun.faces.application.WebappLifecycleListener" is already configured for this context. The duplicate definition has been ignored.

log4j:ERROR Could not find value for key log4j.appender.file

log4j:ERROR Could not instantiate appender named "file".

2010-5-26 17:39:54 org.apache.catalina.core.StandardContext filterStart

严重: Exception starting filter struts2filter

Unable to load configuration. - [unknown location]

at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)

at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)

at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)

at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)

at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)

at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)

at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)

at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3800)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4450)

at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1173)

at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1271)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:296)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)

at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)

at java.lang.Thread.run(Thread.java:619)

Caused by: Caught exception while loading file struts-default.xml - [unknown location]

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:894)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:144)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:111)

at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:164)

at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)

... 17 more

Caused by: java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration

at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)

at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)

at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source)

at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source)

at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.<init>(SAX2DOM.java:69)

at com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory.getSerializationHandler(TransletOutputHandlerFactory.java:187)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.getOutputHandler(TransformerImpl.java:392)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerHandlerImpl.setResult(TransformerHandlerImpl.java:137)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.setup(DomHelper.java:205)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:190)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:181)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:167)

at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:107)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:885)

... 21 more

2010-5-26 17:39:54 org.apache.catalina.core.StandardContext start

严重: Error filterStart

2010-5-26 17:39:54 org.apache.catalina.core.StandardContext start

严重: Context [/dangdang] startup failed due to previous errors