Tomcat对应的JSP/Servlet版本规范
参考：http://tomcat.apache.org/whichversion.html
| Servlet Spec | JSP Spec | EL Spec | WebSocket Spec | Apache Tomcat version | Actual release revision | Minimum Java Version |
| 3.1 | 2.3 | 3.0 | 1.0 | 8.0.x | 8.0.0-RC1 (alpha) | 1.7 |
| 3.0 | 2.2 | 2.2 | N/A | 7.0.x | 7.0.42 | 1.6 |
| 2.5 | 2.1 | 2.1 | N/A | 6.0.x | 6.0.37 | 1.5 |
| 2.4 | 2.0 | N/A | N/A | 5.5.x (archived) | 5.5.36 (archived) | 1.4 |
| 2.3 | 1.2 | N/A | N/A | 4.1.x (archived) | 4.1.40 (archived) | 1.3 |
| 2.2 | 1.1 | N/A | N/A | 3.3.x (archived) | 3.3.2 (archived) | 1.1 |