servlet-api-2.4.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/s-优快云博客

在启动Tomcat项目时，由于WEB-INF/lib目录下的servlet-api-2.4.jar与Tomcat/lib下的servlet-api.jar冲突，导致错误。解决办法是删除WEB-INF/lib下的servlet-api*.jar，以避免版本冲突。此外，还出现了多个应用程序监听器配置错误，如com.pltfm.sys.util.AppListener、com.pltfm.batch.ContextListener和com.pltfm.suggest.job.UpdateSuggestIndexRunner，这些类未被找到，可能是类路径问题。

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tomcat项目启动的时候报下面的错误
原因：项目的WEB-INF/lib下有servlet-api*.*.jar。jar包，和tomcat/lib 下的servlet-api.jar 包冲突
两选一去掉ok ，建议去掉WEB-INF/lib 下
信息: Starting Servlet Engine: Apache Tomcat/6.0.30
2012-3-23 16:08:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(E:\xop-platform-workspace2\SearchWeb_20120308\src\main\webapp\WEB-INF\lib\servlet-api-2.4.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
2012-3-23 16:08:01 org.apache.catalina.core.StandardContext listenerStart

 严重: Error configuring application listener of class com.pltfm.sys.util.AppListener
 java.lang.ClassNotFoundException: com.pltfm.sys.util.AppListener
	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.StandardContext.listenerStart(StandardContext.java:4115)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4671)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
	at org.apache.catalina.core.StandardService.start(StandardService.java:525)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
	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)
2012-3-23 16:08:01 org.apache.catalina.core.StandardContext listenerStart
严重: Error configuring application listener of class com.pltfm.batch.ContextListener
java.lang.ClassNotFoundException: com.pltfm.batch.ContextListener
	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.StandardContext.listenerStart(StandardContext.java:4115)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4671)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
	at org.apache.catalina.core.StandardService.start(StandardService.java:525)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
	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)
2012-3-23 16:08:01 org.apache.catalina.core.StandardContext listenerStart
严重: Error configuring application listener of class com.pltfm.suggest.job.UpdateSuggestIndexRunner
java.lang.ClassNotFoundException: com.pltfm.suggest.job.UpdateSuggestIndexRunner
	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.StandardContext.listenerStart(StandardContext.java:4115)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4671)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
	at org.apache.catalina.core.StandardService.start(StandardService.java:525)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
	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)
2012-3-23 16:08:01 org.apache.catalina.core.StandardContext listenerStart