JSP/Servlet Specifications

I never actually remember these things, so it's time to blog about it...

JSP/Servlet Version

Servlet Version	JSP Version	JSTL Version	Java EE Version
2.5	2.1	1.2	5
2.4	2.0	1.1	1.4
2.3	1.2	1.0	1.3
2.2	1.1	1.0	1.2

In order to use Servlet 2.2, the web.xml needs to require it:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD
Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
...

For Servlet 2.3, the web.xml starts with:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD
Web Application 2.3//EN" "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd">
<web-app>
...

For Servlet 2.4, the web.xml starts with:

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app 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"
 version="2.4">
...

For Servlet 2.5, the web.xml starts with:

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
 xsi="http://www.w3.org/2001/XMLSchema-instance"
 schemalocation="http://java.sun.com/xml/ns/j2ee
   http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd"
 version="2.5">
...