前两天重新安装了jdk,tomcat,maven 等开发组件。然后将一个以前开发完成的一个项目放到tomcat中，eclipse的控制台打印出了异常日志如下：

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SEVERE: A child container failed during start java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failed to start component[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/cepis]] 

at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252) at java.util.concurrent.FutureTask.get(FutureTask.java:111) 
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) 
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/cepis]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 7 more
 Caused by:java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext 
at java.lang.Class.getDeclaredFields0(Native Method) 
at java.lang.Class.privateGetDeclaredFields(Class.java:2308) 
at java.lang.Class.getDeclaredFields(Class.java:1760) 
at org.apache.catalina.startup.WebAnnotationSet.getDeclaredFields(WebAnnotationSet.java:452) 
at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:257) 
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:136) 
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)
at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858) 
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345) 
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) 
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more
 Caused by:java.lang.ClassNotFoundException: org.springframework.context.ApplicationContext 
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711) 
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
 ... 21 moreAug 16, 2012 9:18:19 AM org.apache.catalina.core.ContainerBase 
startInternal SEVERE: A child container failed during start java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:
 Failed to start component[StandardEngine[Catalina].StandardHost[localhost]] 
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252) 
at java.util.concurrent.FutureTask.get(FutureTask.java:111) 
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) 
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:675) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:601) 
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450) 
Caused by:org.apache.catalina.LifecycleException: Failed to start component[StandardEngine[Catalina].StandardHost[localhost]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
at java.lang.Thread.run(Thread.java:722)
 Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136) 
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more Aug 16, 20129:18:19 AM org.apache.catalina.startup.Catalina 
start SEVERE: Catalina.start:org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:675) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:601) 
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
 Caused by:org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) 
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more
 Caused by:org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) 
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 9 more
 Caused by:org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136) 
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
 ... 11 more JUE 22, 2016 6:12:59 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 885 ms
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这个异常是因为我们没有将maven库映射到WEB-INF/lib下，
解决方法为：
右击项目-->点击deployment assembly-->点击add-->点击 java build path entires -->点击next-->点击maven dependencies-->点击finish然后重启项目

java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext