項目原來是部署在weblogic中，今天想看看在tomcat中怎么樣，於是就把項目發布在tomcat中，可是啟動的時候遇到如下異常：
嚴重: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1099)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1621)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> basePath.java in servlet mapping
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3208)
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3183)
at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1302)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1294)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
2013-4-8 14:23:00 org.apache.catalina.startup.HostConfig deployDirectory
嚴重: Error deploying web application directory D:\tomcat 7.0\apache-tomcat-7.0.27\webapps\localhost
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/localhost]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1099)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1621)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
仔細查看了一下上面的異常，發現上面加粗的部分，於是找到了web.xml中的相關部分，代碼如下：
<servlet>
<servlet-name>basePath</servlet-name>
<servlet-class>com.localhost.website.commons.net.BasePathServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>basePath</servlet-name>
<url-pattern>basePath.java</url-pattern>
</servlet-mapping>
這個是在weblogic中運行的，沒有問題，現在發布到了tomcat中遇到了上面的問題，這是時候把
<url-pattern>basePath.java</url-pattern> 修改成 <url-pattern>/basePath.java</url-pattern>
啟動的時候就沒有問題了，原因可能是因為我在weblogic中配置的域名的問題，而沒有項目名照成的，當然這個只是猜測，沒有具體是查找