starting Tomcat v7.0 Server at localhost has encountered a problem

 异常如下
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/day222]]
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/day222]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more
Caused by: java.lang.IllegalArgumentException: The servlets named [PersonServlet] and [com.jugiven.servlet.PersonServlet] are both mapped to the url-pattern [/PersonServlet] which is not permitted
at org.apache.catalina.deploy.WebXml.addServletMapping(WebXml.java:293)
at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2396)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2072)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2033)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2026)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2026)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2026)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1291)

解决：我的问题出在：我的web.xml放错位置导致的，就这么简单，不可思议吧

web.xml要放在webInf下，其次配置servlet时候，  <url-pattern></url-pattern>

中写“/servlet的名字的一半