以下是Struts2过滤器的配置，出现了异常，请大家帮忙看下
<filter>
<filter-name>Struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
<init-param>
<param-name>actionPackages</param-name>
<param-value>com.mycompany.myapp.actions</param-value>
</init-param>
<init-param>
<param-name>configProviders</param-name>
<param-value>providers.MyConfigurationProvider</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
严重: Exception starting filter Struts2
Unable to locate provider class: providers.MyConfigurationProvider - Class: org.apache.catalina.loader.WebappClassLoader
File: WebappClassLoader.java
Method: loadClass
......
<filter>
<filter-name>Struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
<init-param>
<param-name>actionPackages</param-name>
<param-value>com.mycompany.myapp.actions</param-value>
</init-param>
<init-param>
<param-name>configProviders</param-name>
<param-value>providers.MyConfigurationProvider</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
严重: Exception starting filter Struts2
Unable to locate provider class: providers.MyConfigurationProvider - Class: org.apache.catalina.loader.WebappClassLoader
File: WebappClassLoader.java
Method: loadClass
......
信息: Initialization processed in 597 ms
2010-4-10 20:26:34 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2010-4-10 20:26:34 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.20
2010-4-10 20:26:35 org.apache.catalina.startup.HostConfig deployDescriptor
警告: A docBase D:\Program Files\apache-tomcat-6.0.20\webapps\webdemo inside the host appBase has been specified, and will be ignored
log4j:WARN No appenders could be found for logger (org.apache.struts2.dispatcher.Dispatcher).
log4j:WARN Please initialize the log4j system properly.
2010-4-10 20:26:39 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter Struts2
Unable to locate provider class: providers.MyConfigurationProvider - Class: org.apache.catalina.loader.WebappClassLoader
File: WebappClassLoader.java
Method: loadClass
Line: 1387 - org/apache/catalina/loader/WebappClassLoader.java:1387:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
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.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.deployDescriptor(HostConfig.java:630)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:556)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:491)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)
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:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: Unable to locate provider class: providers.MyConfigurationProvider - Class: org.apache.catalina.loader.WebappClassLoader
File: WebappClassLoader.java
Method: loadClass
Line: 1387 - org/apache/catalina/loader/WebappClassLoader.java:1387:-1
at org.apache.struts2.dispatcher.Dispatcher.init_CustomConfigurationProviders(Dispatcher.java:350)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:414)
... 28 more
Caused by: java.lang.ClassNotFoundException: providers.MyConfigurationProvider
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.struts2.util.ClassLoaderUtils.loadClass(ClassLoaderUtils.java:111)
at org.apache.struts2.dispatcher.Dispatcher.init_CustomConfigurationProviders(Dispatcher.java:342)
... 29 more
2010-4-10 20:26:39 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2010-4-10 20:26:39 org.apache.catalina.core.StandardContext start
严重: Context [/webdemo] startup failed due to previous errors
2010-4-10 20:26:40 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2010-4-10 20:26:40 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2010-4-10 20:26:40 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2010-4-10 20:26:40 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2010-4-10 20:26:40 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/63 config=null
2010-4-10 20:26:41 org.apache.catalina.startup.Catalina start
信息: Server startup in 6564 ms