Servlet和JSP规范版本对应关系：
| Servlet规范版本 | JSP版本 | JSF版本 | JAVA EE版本 |
|---|---|---|---|
| Servlet2.3 | JSP1.2、JSP1.1 | J2EE1.3 | |
| Servlet2.4 | JSP2.0 | JSF1.1 | J2EE1.4 |
| Servlet2.5 | JSP2.1 | JSF1.2、JSF2.0 | Java EE5 |
| Servlet3.0 | JSP2.2 | Java EE6 |
Tomcat所对应的Servlet/JSP规范和JDK版本：
| Servlet Spec | JSP Spec | EL Spec | WebSocket Spec | JASPIC Spec | Apache Tomcat Version | Latest Released Version | Supported Java Versions |
|---|---|---|---|---|---|---|---|
| 4.0 | 2.3 | 3.0 | 1.1 | 1.1 | 9.0.x | 9.0.8 | 8 and later |
| 3.1 | 2.3 | 3.0 | 1.1 | 1.1 | 8.5.x | 8.5.31 | 7 and later |
| 3.1 | 2.3 | 3.0 | 1.1 | N/A | 8.0.x (superseded) | 8.0.51 (superseded) | 7 and later |
| 3.0 | 2.2 | 2.2 | 1.1 | N/A | 7.0.x | 7.0.86 | 6 and later (7 and later for WebSocket) |
| 2.5 | 2.1 | 2.1 | N/A | N/A | 6.0.x (archived) | 6.0.53 (archived) | 5 and later |
| 2.4 | 2.0 | N/A | N/A | N/A | 5.5.x (archived) | 5.5.36 (archived) | 1.4 and later |
| 2.3 | 1.2 | N/A | N/A | N/A | 4.1.x (archived) | 4.1.40 (archived) | 1.3 and later |
| 2.2 | 1.1 | N/A | N/A | N/A | 3.3.x (archived) | 3.3.2 (archived) | 1.1 and later |
Apache官方对各版本的解释：http://tomcat.apache.org/whichversion.html。