哪位大佬能帮我看一下我的报错信息，萌新表示看不懂

Question

2018-5-24 17:17:10 org.apache.catalina.core.AprLifecycleListener init

信息: Loaded APR based Apache Tomcat Native library 1.1.34 using APR version 1.5.1.

2018-5-24 17:17:10 org.apache.catalina.core.AprLifecycleListener init

信息: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].

2018-5-24 17:17:10 org.apache.catalina.core.AprLifecycleListener initializeSSL

信息: OpenSSL successfully initialized with version OpenSSL 1.0.1q 3 Dec 2015

2018-5-24 17:17:10 org.apache.coyote.http11.Http11AprProtocol init

信息: Initializing Coyote HTTP/1.1 on http-8080

2018-5-24 17:17:10 org.apache.coyote.ajp.AjpAprProtocol init

信息: Initializing Coyote AJP/1.3 on ajp-8009

2018-5-24 17:17:10 org.apache.catalina.startup.Catalina load

信息: Initialization processed in 766 ms

2018-5-24 17:17:10 org.apache.catalina.core.StandardService start

信息: Starting service Catalina

2018-5-24 17:17:10 org.apache.catalina.core.StandardEngine start

信息: Starting Servlet Engine: Apache Tomcat/6.0.45

2018-5-24 17:17:10 org.apache.catalina.startup.HostConfig deployDescriptor

信息: Deploying configuration descriptor host-manager.xml

2018-5-24 17:17:10 org.apache.catalina.startup.HostConfig deployDescriptor

信息: Deploying configuration descriptor manager.xml

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory BookWork

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory docs

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory examples

2018-5-24 17:17:11 org.apache.catalina.core.ApplicationContext log

信息: ContextListener: contextInitialized()

2018-5-24 17:17:11 org.apache.catalina.core.ApplicationContext log

信息: SessionListener: contextInitialized()

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory MyFirstServletDemo

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory ROOT

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory s

2018-5-24 17:17:11 org.apache.catalina.core.StandardContext filterStart

严重: Exception starting filter EncodingFilter

java.lang.ClassNotFoundException: serlvet.EncodingFilter

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)

at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:272)

at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:119)

at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4102)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4760)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:803)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:780)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)

at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1080)

at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1003)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:507)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:325)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1069)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)

at org.apache.catalina.core.StandardService.start(StandardService.java:525)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)

at org.apache.catalina.startup.Catalina.start(Catalina.java:595)

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

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

2018-5-24 17:17:11 org.apache.catalina.core.StandardContext start

严重: Error filterStart

2018-5-24 17:17:11 org.apache.catalina.core.StandardContext start

严重: Context [/s] startup failed due to previous errors

2018-5-24 17:17:11 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory ServeltDemoByep

2018-5-24 17:17:12 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory ServletGetInit

2018-5-24 17:17:12 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory ServletLifeCycleDemo

2018-5-24 17:17:12 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory ServletPathDirection

2018-5-24 17:17:12 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory test

2018-5-24 17:17:12 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory test.myeclipse.bak

2018-5-24 17:17:12 org.apache.coyote.http11.Http11AprProtocol start

信息: Starting Coyote HTTP/1.1 on http-8080

2018-5-24 17:17:12 org.apache.coyote.ajp.AjpAprProtocol start

信息: Starting Coyote AJP/1.3 on ajp-8009

2018-5-24 17:17:12 org.apache.catalina.startup.Catalina start

信息: Server startup in 2158 ms

我知道是划线的那个地方出问题了，但是看不出是什么问题.....

Answer 1

严重: Exception starting filter EncodingFilter java.lang.ClassNotFoundException: serlvet.EncodingFilter错误如上，问题是没有找到serlvet.EncodingFilter 这个类呀， 是不是web.xml中写了这个Filter，但是没有引入相关jar包？