今天开始学习servlet简单的写了一次web.xml以后tomcat就一直报错 ?报错

问题:严重:Achildcontainerfailedduringstart
java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
atjava.util.concurrent.FutureTask.report(FutureTask.java:122)
atjava.util.concurrent.FutureTask.get(FutureTask.java:192)
atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)
atorg.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
atjava.lang.Thread.run(Thread.java:745)
Causedby:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
...6more
Causedby:java.lang.NoSuchMethodError:javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
atorg.apache.tomcat.websocket.server.WsServerContainer.(WsServerContainer.java:150)
atorg.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131)
atorg.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47)
atorg.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...6more

三月22,20174:11:04下午org.apache.catalina.core.ContainerBasestartInternal
严重:Achildcontainerfailedduringstart
java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Servlet]]
atjava.util.concurrent.FutureTask.report(FutureTask.java:122)
atjava.util.concurrent.FutureTask.get(FutureTask.java:192)
atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)
atorg.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
atjava.lang.Thread.run(Thread.java:745)
Causedby:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Servlet]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
...6more
Causedby:java.lang.NoSuchMethodError:javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
atorg.apache.tomcat.websocket.server.WsServerContainer.(WsServerContainer.java:150)
atorg.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131)
atorg.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47)
atorg.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...6more

三月22,20174:11:04下午org.apache.catalina.core.ContainerBasestartInternal
严重:Achildcontainerfailedduringstart
java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost]]
atjava.util.concurrent.FutureTask.report(FutureTask.java:122)
atjava.util.concurrent.FutureTask.get(FutureTask.java:192)
atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)
atorg.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
atorg.apache.catalina.core.StandardService.startInternal(StandardService.java:441)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
atorg.apache.catalina.core.StandardServer.startInternal(StandardServer.java:789)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
atorg.apache.catalina.startup.Catalina.start(Catalina.java:629)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:498)
atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)
Causedby:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina].StandardHost[localhost]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
atjava.lang.Thread.run(Thread.java:745)
Causedby:org.apache.catalina.LifecycleException:Achildcontainerfailedduringstart
atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:951)
atorg.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...6more

三月22,20174:11:04下午org.apache.catalina.startup.Catalinastart
严重:TherequiredServercomponentfailedtostartsoTomcatisunabletostart.
org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardServer[8005]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
atorg.apache.catalina.startup.Catalina.start(Catalina.java:629)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:498)
atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)
Causedby:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardService[Catalina]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
atorg.apache.catalina.core.StandardServer.startInternal(StandardServer.java:789)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...7more
Causedby:org.apache.catalina.LifecycleException:Failedtostartcomponent[StandardEngine[Catalina]]
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
atorg.apache.catalina.core.StandardService.startInternal(StandardService.java:441)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...9more
Causedby:org.apache.catalina.LifecycleException:Achildcontainerfailedduringstart
atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:951)
atorg.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
...11more

三月22,20174:11:04下午org.apache.coyote.AbstractProtocolpause
信息:PausingProtocolHandler["http-nio-8080"]
三月22,20174:11:04下午org.apache.coyote.AbstractProtocolpause
信息:PausingProtocolHandler["ajp-nio-8009"]
三月22,20174:11:04下午org.apache.catalina.core.StandardServicestopInternal
信息:StoppingserviceCatalina
三月22,20174:11:04下午org.apache.coyote.AbstractProtocoldestroy
信息:DestroyingProtocolHandler["http-nio-8080"]
三月22,20174:11:04下午org.apache.coyote.AbstractProtocoldestroy
严重:FailedtodestroyendpointassociatedwithProtocolHandler["http-nio-8080"]
java.lang.NullPointerException
atorg.apache.tomcat.util.net.NioEndpoint.releaseCaches(NioEndpoint.java:316)
atorg.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:492)
atorg.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:883)
atorg.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:551)
atorg.apache.catalina.connector.Connector.destroyInternal(Connector.java:1023)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.core.StandardService.destroyInternal(StandardService.java:589)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:879)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.startup.Catalina.start(Catalina.java:633)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:498)
atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)

三月22,20174:11:04下午org.apache.coyote.AbstractProtocoldestroy
信息:DestroyingProtocolHandler["ajp-nio-8009"]
三月22,20174:11:04下午org.apache.coyote.AbstractProtocoldestroy
严重:FailedtodestroyendpointassociatedwithProtocolHandler["ajp-nio-8009"]
java.lang.NullPointerException
atorg.apache.tomcat.util.net.NioEndpoint.releaseCaches(NioEndpoint.java:316)
atorg.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:492)
atorg.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:883)
atorg.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:551)
atorg.apache.catalina.connector.Connector.destroyInternal(Connector.java:1023)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.core.StandardService.destroyInternal(StandardService.java:589)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:879)
atorg.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
atorg.apache.catalina.startup.Catalina.start(Catalina.java:633)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:498)
atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)

把你的web.xml贴出来看一下

你看看配置的tomcat是7.0还是软件自带的，tomcat主页能打开么

启动Tomcat有问题吗？

你把Eclipse中的Tomcat删掉，然后再重新导入到Eclipse中，试一下

应该是你web.xml中配置有问题，或是缺jar包了