J2EE版本

Different versions of JEE:

Note: JPE (Java Professional Edition) project announced in May 1998 at Sun Microsystems.

Version	Released in
JEE2 (J2EE 1.2)	12 Dec 1999	Servlet 2.2	JSP 1.1
JEE3 (J2EE 1.3)	24 Sep 2001	Servlet 2.3	JSP 1.2		JSTL 1.0
JEE4 (J2EE 1.4)	11 Nov 2003	Servlet 2.4	JSP 2.0		JSTL 1.1	JSF1.1
JEE5	11 May 2006	Servlet 2.5	JSP 2.1	EL2.1	JSTL 1.2	JSF 1.2
JEE6	10 Dec 2009	Servlet 3.0	JSP 2.2	EL 2.2	JSTL 1.2	JSF 2.0
JEE7	12 Jun 2013	Servlet 3.1	JSP 2.3	EL 3.0	JSTL 1.2	JSF 2.2

JEE and TOMCAT:

Lets only look at servlet and JSP versions in JEE as it compares to in TOMCAT.

JEE Version	TOMCAT Version
JEE3 implements Servlet 2.3 and JSP 1.2	Tomcat 4 supports the same (Servlet 2.3 and JSP 1.2)
JEE4 implements Servlet 2.4 and JSP 2.0	Tomcat 5 supports the same
JEE5 implements Servlet 2.5, JSP 2.1, JSTL 1.2, JSF 1.2	Tomcat 6 supports Servlet 2.5, JSP 2.1 only. No JSTL. No JSF
JEE6 implements Servlet 3.0, JSP 2.2, EL 2.2, JSTL 1.2, JSF 2.0