Tomcat部署项目时出错java.lang.IllegalStateException: ContainerBase.addChild: start:org.apache.catalina.LifecycleException: Failed to start component[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/项目名]]

一个非常easy的项目。没有出现编译错误，从Eclipse中用Tomcat v7.0 server启动出现下面错误，貌似不是项目本身的问题（如由于库没有导入）。

六月 10, 2015 2:02:50 下午 org.apache.catalina.startup.Catalina start

严重: 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:689)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)

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:739)

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:1131)

at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

… 11 more

六月 10, 2015 2:02:50 下午 org.apache.coyote.AbstractProtocol pause

信息: Pausing ProtocolHandler [“http-bio-8080”]

六月 10, 2015 2:02:50 下午 org.apache.coyote.AbstractProtocol pause

信息: Pausing ProtocolHandler [“ajp-bio-8009”]

六月 10, 2015 2:02:50 下午 org.apache.catalina.core.StandardService stopInternal

信息: Stopping service Catalina

六月 10, 2015 2:02:50 下午 org.apache.coyote.AbstractProtocol destroy

信息: Destroying ProtocolHandler [“http-bio-8080”]

六月 10, 2015 2:02:50 下午 org.apache.coyote.AbstractProtocol destroy

信息: Destroying ProtocolHandler [“ajp-bio-8009”]

把项目部署到tomcat文件夹下，用命令行启动。报下面错误。

所以能够肯定得是是Tomcat容器在载入我们servlet的时候出现的问题。所以重点检查web.xml文件是否有问题：servlet是否都定义了，mapping映射是否定义正确….最后发现问题的本源在于servlet-name上下没有相应