Java:Servlet历史
| Servlet API version | Released | Platform | Important Changes |
|---|---|---|---|
| Servlet 4.0 | Under development | Java EE 8 | HTTP/2 |
| Servlet 3.1 | May 2013 | Java EE 7 | Non-blocking I/O, HTTP protocol upgrade mechanism (WebSocket)[1] |
| Servlet 3.0 | December 2009 | Java EE 6, Java SE 6 | Pluggability, Ease of development, Async Servlet, Security, File Uploading |
| Servlet 2.5 | September 2005 | Java EE 5, Java SE 5 | Requires Java SE 5, supports annotation |
| Servlet 2.4 | November 2003 | J2EE 1.4, J2SE 1.3 | web.xml uses XML Schema |
| Servlet 2.3 | August 2001 | J2EE 1.3, J2SE 1.2 | Addition of Filter
|
| Servlet 2.2 | August 1999 | J2EE 1.2, J2SE 1.2 | Becomes part of J2EE, introduced independent web applications in .war files |
| Servlet 2.1 | November 1998 | Unspecified | First official specification, added RequestDispatcher, ServletContext
|
| Servlet 2.0 | JDK 1.1 | Part of Java Servlet Development Kit 2.0 | |
| Servlet 1.0 | June 1997 |