web-app 4.0 web.xml备忘

web.xml 4.0版本的备忘

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee  http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" 
 version="4.0" metadata-complete="true">