web.xml报错

 

The content of element type "web-app" must match "(icon?,display-
 name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,servlet-
 mapping*,session-config?,mime-mapping*,welcome-file-list?,error-page*,taglib*,resource-env-
 ref*,resource-ref*,security-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)".

 

调整web.xml里的顺序，严格按照这个提示的顺序来！