java web 之 不同版本的web.xml配置

web.xml

web.xml 2.3

<?xml version="1.0" encoding="ISO-8859-1"?>  <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">  <web-app>  </web-app>

web.xml 2.4

<?xml version="1.0" encoding="UTF-8"?>  <web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  </web-app>  

web.xml 2.5

<?xml version="1.0" encoding="UTF-8"?>  <web-app xmlns="http://java.sun.com/xml/ns/javaee"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"  version="2.5">  </web-app>  

web.xml 3.0

<?xml version="1.0" encoding="UTF-8"?>  <web-app          version="3.0"          xmlns="http://java.sun.com/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">  </web-app>  

web-fragment.xml

<web-fragment xmlns="http://java.sun.com/xml/ns/javaee"                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                xsi:schemaLocation="          http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-fragment_3_0.xsd" version="3.0">  </web-fragment>  

web.xml 3.1

<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_3_1.xsd"             version="3.1"></web-app>