web.xml文件头声明各个版本参考

1. Servlet 3.1
   Java EE 7 XML schema, namespace is http://xmlns.jcp.org/xml/ns/javaee/

"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">

 

2. Servlet 3.0
   Java EE 6 XML schema, namespace is http://java.sun.com/xml/ns/javaee

"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"
          version="3.0">

 

3. Servlet 2.5
   Java EE 5 XML schema, namespace is http://java.sun.com/xml/ns/javaee

"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">

 

4. Servlet 2.4
   J2EE 1.4 XML schema, namespace is http://java.sun.com/xml/ns/j2ee

"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"
          version="2.4">

  Servlet 2.4 Web Application

 

5. Servlet 2.3
   J2EE 1.3 DTDs schema. This web.xml file is too old, highly recommend you to upgrade it.

app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >


  Servlet 2.3 Web Application

 

 

 

转载于:https://www.cnblogs.com/Im-Victor/p/10919577.html