真的是快要疯了，Tomcat启动时找不到存在的jar

[weixin_38060120]

 开发四年只会写业务代码，分布式高并发都不会还做程序员？->>>    确定有加入commons-lang-2.6.jar，commons-lang3-3.3.1.jar也试过，可是在启动Tomcat时还是报：java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils 为这种看似简单的问题折腾了个大半天，我要疯了。救救我吧！ Mar 24, 2014 11:35:22 AM org.apache.catalina.core.StandardServer await INFO: A valid shutdown command was received via the shutdown port. Stopping the Server instance. Mar 24, 2014 11:35:22 AM org.apache.coyote.AbstractProtocol pause INFO: Pausing ProtocolHandler ["http-bio-8080"] Mar 24, 2014 11:35:22 AM org.apache.catalina.core.StandardService stopInternal INFO: Stopping service Catalina Mar 24, 2014 11:35:22 AM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextDestroyed() Mar 24, 2014 11:35:22 AM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextDestroyed() Mar 24, 2014 11:35:22 AM org.apache.coyote.AbstractProtocol stop INFO: Stopping ProtocolHandler ["http-bio-8080"] Mar 24, 2014 11:35:22 AM org.apache.coyote.AbstractProtocol destroy INFO: Destroying ProtocolHandler ["http-bio-8080"] Mar 24, 2014 11:35:32 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] Mar 24, 2014 11:35:32 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 574 ms Mar 24, 2014 11:35:32 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina Mar 24, 2014 11:35:32 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.40 Mar 24, 2014 11:35:32 AM org.apache.catalina.core.StandardContext filterStart SEVERE: Exception starting filter global java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils     at framework.GlobalFilter.init(GlobalFilter.java:55)     at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)     at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)     at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)     at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4746)     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5399)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)     at java.util.concurrent.FutureTask.run(FutureTask.java:166)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)     at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)     ... 14 more Mar 24, 2014 11:35:32 AM org.apache.catalina.core.StandardContext startInternal SEVERE: Error filterStart Mar 24, 2014 11:35:32 AM org.apache.catalina.core.StandardContext startInternal SEVERE: Context [] startup failed due to previous errors Mar 24, 2014 11:35:32 AM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home/lucky/apps/apache-tomcat-7.0.40/webapps/host-manager Mar 24, 2014 11:35:32 AM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home/lucky/apps/apache-tomcat-7.0.40/webapps/examples Mar 24, 2014 11:35:33 AM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextInitialized() Mar 24, 2014 11:35:33 AM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextInitialized() Mar 24, 2014 11:35:33 AM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@484c3f0b') Mar 24, 2014 11:35:33 AM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home/lucky/apps/apache-tomcat-7.0.40/webapps/manager Mar 24, 2014 11:35:33 AM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home/lucky/apps/apache-tomcat-7.0.40/webapps/docs Mar 24, 2014 11:35:33 AM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-bio-8080"] Mar 24, 2014 11:35:33 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 1147 ms