严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catali

本身写了个最简单的springMVC项目练练手，没有用maven，在WebContent中新建了lib文件夹，将jar包复制到这里面，而后add to build path到项目里。

启动Tomcat，报错，启动不起来。在网页中运行localhost:8080发现Tomcat页面是能够打开的。

报错内容以下：

 1 严重: A child container failed during start
 2 java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/zhang]]
 3     at java.util.concurrent.FutureTask.report(FutureTask.java:122)
 4     at java.util.concurrent.FutureTask.get(FutureTask.java:188)
 5     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
 6     at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
 7     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
 8     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
 9     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
10     at java.util.concurrent.FutureTask.run(FutureTask.java:262)
11     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
12     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
13     at java.lang.Thread.run(Thread.java:745)
14 Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/zhang]]
15     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
16     ... 6 more
17 Caused by: java.lang.NoClassDefFoundError: org/springframework/web/context/WebApplicationContext
18     at java.lang.Class.getDeclaredFields0(Native Method)
19     at java.lang.Class.privateGetDeclaredFields(Class.java:2436)
20     at java.lang.Class.getDeclaredFields(Class.java:1806)
21     at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)
22     at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:261)
23     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:140)
24     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)
25     at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:403)
26     at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:879)
27     at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:374)
28     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
29     at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
30     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5355)
31     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
32     ... 6 more
33 Caused by: java.lang.ClassNotFoundException: org.springframework.web.context.WebApplicationContext
34     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
35     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
36     ... 20 more

网上百度你们都说是jar包缺乏。可是检查spring所须要的jar包，都存在，以下图。

而后就看lib文件是否是有问题，果真有问题。

原来个人lib文件夹在WebContent下，将它放到WEB-INF目录下，再从新将jar包add to build path里，项目就能启动了。

 

如今将这个问题分享出来，但愿能帮到其余的朋友。

可能我犯得这个错误很低级，别人不会犯这种错误吧。^_^