Eclipse 运行web project，出现Server Tomcat v9.0 Server at localhost failed to start.错误

一直出现Server Tomcat v9.0 Server at localhost failed to start.

看到一篇文章http://stackoverflow.com/questions/39310432/fixing-apache-v9-0-server-tomcat-v9-0-server-at-localhost-failed-to-start-error

发现web.xml的问题也会导致这个。

重新找了个web.xml的模板，改下，就好了。