tomcat出现错误 org.apache.catalina.LifecycleException

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ajax]]

 at java.util.concurrent.FutureTask$Sync.innerGet(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:800)

 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$Sync.innerRun(Unknown Source)

 at java.util.concurrent.FutureTask.run(Unknown Source)

 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(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[/ajax]]

 at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)

 ... 7 more

 

 

解决访法：检查web.xml中的servlet映射<url-pattern>

出现此异常，一般是由于过滤器造成的。

@WebFilter("/*")

过滤器弄错了，检查<url-pattern></url-pattern>中配置的内容是否缺少“/” ,"/"表示当前web应用。