struts2启动时报错
lmzpp 2010-08-05 11:52:48 2010-8-5 11:46:12 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: D:\Program Files\Java\jdk1.6.0_21\bin;.;D:\Windows\Sun\Java\bin;D:\Windows\system32;D:\Windows;D:/Program Files/Java/jdk1.6.0_21/bin/../jre/bin/client;D:/Program Files/Java/jdk1.6.0_21/bin/../jre/bin;,;D:\Program Files\Java\jdk1.6.0_21\bin;D:\Windows\system32;D:\Windows;D:\Windows\System32\Wbem;D:\Windows\System32\WindowsPowerShell\v1.0\;D:\TOOLS\bin;E:\bin;;D:\TOOLS\MySQL\bin;D:\MySQL\bin;E:\MySQL\bin;D:\Program Files\MySQL\MySQL Server 7.0\bin
2010-8-5 11:46:12 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:StrutsOne' did not find a matching property.
2010-8-5 11:46:13 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2010-8-5 11:46:13 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 623 ms
2010-8-5 11:46:13 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2010-8-5 11:46:13 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.28
2010-8-5 11:46:13 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
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:4001)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
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:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2010-8-5 11:46:13 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2010-8-5 11:46:13 org.apache.catalina.core.StandardContext start
严重: Context [/StrutsOne] startup failed due to previous errors
请问一下这是什么错误啊?