启动tomcat 出现Exception starting filter struts2 异常

[xiaozhilover]

2010-1-27 22:24:01 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2010-1-27 22:24:01 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2010-1-27 22:24:01 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1484)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
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:3838)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
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:526)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
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:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
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)


我已经导入了commons-logging-1.0.4.jar,freemaker-2.3.15.jar,ongl-2.7.3.jar,struts-core.2.1.8.jar,xwork-core-2.1.6.jar,commons-fileupload-1.2.1.jar 一共6个包

web.xml中主要是：
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

一切看起来都很正常，但就是不知道为什么出现这个异常，希望大家能帮助一下,多谢！

[ineedaname]

如果我记得没错的话
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher </filter-class>
不是这个
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
冒似是这个

[crazylaa]

java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher
类名写错了还是包不正确？这是个难题哈

[xxy8100]

<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>是正确的 可能包没有找到有问题

[JavaAlpha]

java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher 

包加的不对 或没加

[xiaozhilover]

实在不好意思，各位，自己找到原因了，是struts-core.jar、xwork-core.jar与前面几个包兼容性问题。我替换了就好了。感谢各位了。

[老紫竹]

果然是重复包的问题。

[lijinsheng009]

昨天 我老师 也是 这样对我们说的，我们 用的是 struts1.2的，有个asm.jar 与 asm-2.3.jar 冲突，也是这个问题，学习啊，嘿嘿

[zl3450341]

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

就是这样啊
好像没什么错