eclipse中部署项目报错：
Server Tomcat Server at localhost failed to start.
查看控制台报错信息如下,原来是web.xml文件有问题,导致不能启动
查看控制台报错信息
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> MailSend in servlet mapping
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3432)
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3407)
at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1438)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1359)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:888)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:388)
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:5519)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
检查了下 MailSend in servlet mapping
<servlet>
<servlet-name>MailSend</servlet-name>
<servlet-class>com.csy.servlet.MailSend</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MailSend</servlet-name>
<url-pattern>MailSend</url-pattern>
</servlet-mapping>
发现<url-pattern>MailSend</url-pattern>少写了个/
正确的是
<url-pattern>/MailSend</url-pattern>
