tomcat启动报错

我用jsf+ibatis+spring做一个小程序，tomcat启动报错，如下：

2010-9-25 17:24:48 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\jdk1.5.0_21\bin;.;C:\WINDOWS\system32;C:\WINDOWS;D:\Program Files\Java\jdk1.5.0_21\jre\bin;D:/Program Files/Java/jdk1.5.0_21/bin/../jre/bin/client;D:/Program Files/Java/jdk1.5.0_21/bin/../jre/bin;D:\Program Files\Java\jdk1.5.0_21/bin;D:\software\apache-maven-2.1.0\bin;e:\oracle\product\10.2.0\db_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Common Files\Thunder Network\KanKan\Codecs;C:\Program Files\MySQL\MySQL Server 5.1\bin;d:\Program Files\StormII\Codec;d:\Program Files\StormII;C:\Program Files\IDM Computer Solutions\UltraEdit\
2010-9-25 17:24:49 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2010-9-25 17:24:49 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 889 ms
2010-9-25 17:24:49 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2010-9-25 17:24:49 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.29
java.lang.reflect.InvocationTargetException
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:592)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
[color=darkred][size=xx-small]Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;[/size][/color]
at org.apache.catalina.core.StandardHost$MemoryLeakTrackingListener.lifecycleEvent(StandardHost.java:561)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4625)
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)
... 6 more

谁能帮忙解决一下？