六月?25,?2016?6:52:24?下午?org.apache.catalina.startup.Catalina?start
嚴重:?The?required?Server?component?failed?to?start?so?Tomcat?is?unable?to?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:625)
?at?sun.reflect.NativeMethodAccessorImpl.invoke0(Native?Method)
?at?sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
?at?sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
?at?java.lang.reflect.Method.invoke(Method.java:497)
?at?org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
?at?org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)
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:769)
?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:439)
?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:924)
?at?org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
?at?org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
?...?11?more

原因可能是xml配置問題，或者jar包問題？

但是還是沒找到問題??！求指點