[Tomcat]启动Tomcat时报ClassNotFoundException错误。

Question

想用Struts2.0.12配置一个简单的登录应用，
但每次启动Tomcat时报如下错误：

[code="java"]
2008-11-11 0:22:15 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\MySQL\MySQL Server 5.0\bin;C:\Program Files\StormII\Codec;C:\Program Files\StormII
2008-11-11 0:22:16 org.apache.coyote.http11.Http11BaseProtocol init
信息: Initializing Coyote HTTP/1.1 on http-8888
2008-11-11 0:22:16 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 527 ms
2008-11-11 0:22:16 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2008-11-11 0:22:16 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/5.5.27
2008-11-11 0:22:16 org.apache.catalina.core.StandardHost start
信息: XML validation disabled
2008-11-11 0:22:16 org.apache.catalina.core.ApplicationContext log
信息: Marking servlet action as unavailable
2008-11-11 0:22:16 org.apache.catalina.core.StandardContext loadOnStartup
严重: Servlet /JEETest threw load() exception
java.lang.ClassNotFoundException: org.apache.commons.digester.RuleSet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1089)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:448)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
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:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
2008-11-11 0:22:16 org.apache.coyote.http11.Http11BaseProtocol start
信息: Starting Coyote HTTP/1.1 on http-8888
2008-11-11 0:22:16 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2008-11-11 0:22:16 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/56 config=null
2008-11-11 0:22:17 org.apache.catalina.storeconfig.StoreLoader load
信息: Find registry server-registry.xml at classpath resource
2008-11-11 0:22:17 org.apache.catalina.startup.Catalina start
信息: Server startup in 1120 ms
[/code]
不知道是什么地方配置错了。
希望各位能指点一二。
谢谢！

附件中是本次应用中的web.xml和struts-config.xml。
本人第一次JavaEye发帖子，如有什么应该改进的地方，请直言。
再谢！

Answer 1

web.xml的写法：
[code="xml"]

<filter>
    <filter-name>ActionContextCleanUp</filter-name>
    <filter-class>
        org.apache.struts2.dispatcher.ActionContextCleanUp
    </filter-class>
</filter>
<filter-mapping>
    <filter-name>ActionContextCleanUp</filter-name>
    <url-pattern>*.action</url-pattern>
</filter-mapping>


<!-- struts2 filter -->
<filter>
    <filter-name>struts</filter-name>
    <filter-class>
        org.apache.struts2.dispatcher.FilterDispatcher
    </filter-class>
    <init-param>
        <param-name>actionPackages</param-name>
        <param-value></param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>struts</filter-name>
    <url-pattern>*.action</url-pattern>
</filter-mapping>

[/code]
需要的jar：
freemarker\ognl\xwork\struts-core-xxx
这几个是struts2直接相关的