Referenced file contains errors (http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd)

1、错误描述

Maven项目 web.xml 头部报错

'Description Resource Path Location Type
Referenced file contains errors (http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd). For more information, right click on the message in the Problems View and select "Show
Details..." web.xml /testweba/src/main/webapp/WEB-INF line 1 XML Problem
'

我修改后正确的头部

参考：

https://stackoverflow.com/questions/32538754/eclipse-web-xml-referenced-file-error