修改web.xml后tomcat出错

第一个启动是没错的，但是之后我发现jsp提交数据出现错误
HTTP Status 405 - HTTP method POST is not supported by this URL
type Status report

message HTTP method POST is not supported by this URL

description The specified HTTP method is not allowed for the requested resource
我觉得可能是配置出错(不小心漏掉了t)，所以把它改成下一个，启动tomcat就出错了,这是为什么，就加了个t而已
十二月 18, 2015 7:17:41 下午 org.apache.catalina.core.StandardContext reload
严重: Exception starting Context with name [/JavaWebApp]
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/JavaWebApp]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:4020)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1545)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1518)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1716)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:333)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1373)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1545)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1555)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1523)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: The servlets named [manageServlet] and [Servlet.manageServlet] are both mapped to the url-pattern [/manageServlet] which is not permitted
at org.apache.catalina.deploy.WebXml.addServletMapping(WebXml.java:293)
at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2428)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2103)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2064)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2057)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1304)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:889)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5405)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 12 more

十二月 18, 2015 7:17:41 下午 org.apache.catalina.core.StandardContext reload
信息: Reloading Context with name [/JavaWebApp] is completed

jsp提交数据出现错误，说明提交数据时使用的是POST方法，而异常信息显示你提交的这个URL路径指向的Servlet不支持Post方法。
检查下这个URL对应的Servlet，看看是否限制了访问方法了。

你在doPost中写this.doPost()。那不是死循环吗