java EE错误如何解决阿，都是过了，没有能解决的！

java EE异常怎么解决阿，都是过了，没有能解决的！！

严重: Exception starting filter struts
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1493)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:269)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4038)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4692)
	at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1244)
	at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1342)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:303)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
	at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1385)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1649)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1658)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1638)
	at java.lang.Thread.run(Unknown Source)
2011-5-24 9:42:12 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2011-5-24 9:42:12 org.apache.catalina.core.StandardContext start
严重: Context [/Struts] startup failed due to previous errors

web.xml:

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


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

struts.xml

<struts>
	<package name="default" extends="struts-default">
	
		<action name="connect" class="Action.ConnectAction">
			<result name="success">/ok.jsp</result>
			<result name="error">/error.jsp</result>
		</action>
	</package>
</struts>

页面中：<form action="connect.action" method="post">


导入的包：都是基本包+fileUpload+commons.io没有其他的东西，可是就是抱错，怎么解决阿，都3天了！！！！！

引用:

应该是Jar不全面吧，
commons-fileupload-1.2.1.jar
commons-logging.jar
freemarker-2.3.13.jar
ognl-2.6.11.jar
struts2-core-2.1.6.jar
xwork-2.1.2.jar
参考一下...