我的tomcat啟動(dòng)報(bào)錯(cuò)，情況是這樣的：環(huán)境：系統(tǒng)：windows10java：java8tomcat: tomcat-8.0.28如果不做任何修改，tomcat啟動(dòng)正常，各個(gè)項(xiàng)目運(yùn)行正常。為了編譯方便（沒有用IDE開發(fā)），我把從http://www.java2s.com/Code/Jar/j/Downloadjavaxservlet31jar.htm上下載的servlet-3.1.jar放到了%JAVA_HOME%\jre\lib\ext目錄下編譯倒是省事了，但啟動(dòng)tomcat就出錯(cuò)了，每個(gè)項(xiàng)目的報(bào)錯(cuò)都一樣06-Dec-2015 17:38:43.004 SEVERE [localhost-startStop-1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/docs]]        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)    ... 10 more06-Dec-2015 17:38:43.018 SEVERE [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Error deploying web application directory D:\tomcat\apache-tomcat-8.0.28\webapps\docs java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/docs]]        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1101)        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1816)06-Dec-2015 17:38:43.031 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory D:\tomcat\apache-tomcat-8.0.28\webapps\docs has finished in 488 ms