转载 http://www.cnblogs.com/BuzyAlways/p/5690980.html
servlet版本与tomcat版本对应关系，各版本web.xml头信息写法
The mapping between the specifications and the respective Apache Tomcat versions is:
Servlet Spec JSP Spec EL Spec WebSocket Spec JASPIC Spec Apache Tomcat version Actual release revision Supported Java Versions 4.0@H_403_49@ TBD (2.4?)@H_403_49@ TBD (3.1?)@H_403_49@ TBD (1.2?)@H_403_49@ 1.1@H_403_49@ 9.0.x@H_403_49@ 9.0.0.M9 (alpha)@H_403_49@ 8 and later@H_403_49@ 3.1@H_403_49@ 2.3@H_403_49@ 3.0@H_403_49@ 1.1@H_403_49@ 1.1@H_403_49@ 8.5.x@H_403_49@ 8.5.4@H_403_49@ 7 and later@H_403_49@ 3.1@H_403_49@ 2.3@H_403_49@ 3.0@H_403_49@ 1.1@H_403_49@ N/A@H_403_49@ 8.0.x (superseded)@H_403_49@ 8.0.35 (superseded)@H_403_49@ 7 and later@H_403_49@ 3.0@H_403_49@ 2.2@H_403_49@ 2.2@H_403_49@ 1.1@H_403_49@ N/A@H_403_49@ 7.0.x@H_403_49@ 7.0.70@H_403_49@ 6 and later (7 and later for WebSocket)@H_403_49@ 2.5@H_403_49@ 2.1@H_403_49@ 2.1@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ 6.0.x@H_403_49@ 6.0.45@H_403_49@ 5 and later@H_403_49@ 2.4@H_403_49@ 2.0@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ 5.5.x (archived)@H_403_49@ 5.5.36 (archived)@H_403_49@ 1.4 and later@H_403_49@ 2.3@H_403_49@ 1.2@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ 4.1.x (archived)@H_403_49@ 4.1.40 (archived)@H_403_49@ 1.3 and later@H_403_49@ 2.2@H_403_49@ 1.1@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ N/A@H_403_49@ 3.3.x (archived)@H_403_49@ 3.3.2 (archived)@H_403_49@ 1.1 and later @H_403_49@ web.xml v2.3
1 <?xml version="1.0" encoding="ISO-8859-1"?> 2 <!DOCTYPE web-app PUBLIC "-//Sun Microsystems,Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> 3 4 <web-app5 6 </>web.xml v2.4
xml version="1.0" encoding="UTF-8"web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"web.xml v2.5
1 2 3 xmlns="http://java.sun.com/xml/ns/javaee" 4 5 xmlns:xsi 6 7 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 8 9 version="2.5"10 11web.xml v3.0
2 3 web-app 4 ="3.0" 5 xmlns6 xmlns:xsi7 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"8 9 >
