Servlet 3.1 与 Servlet 3.0 有何不同

Servlet 3.1 与 Servlet 3.0 以及其他版本

+=============+================+====================+=============================================================================+
|   VERSION   |      DATE      |   JAVA EE / JDK    |                             FEATURES / CHANGES                              |
+=============+================+====================+=============================================================================+
| Servlet 3.1 | May 2013       | JavaEE 7           | Non-blocking I/O, HTTP protocol upgrade mechanism                           |
+-------------+----------------+--------------------+-----------------------------------------------------------------------------+
| Servlet 3.0 | December 2009  | JavaEE 6, JavaSE 6 | Pluggability, Ease of development, Async Servlet, Security, File Uploading  |
+-------------+----------------+--------------------+-----------------------------------------------------------------------------+
| Servlet 2.5 | September 2005 | JavaEE 5, JavaSE 5 | Requires JavaSE 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      |                    |                                                                             |
+-------------+----------------+--------------------+-----------------------------------------------------------------------------+

源

servlet 3.1 是否在 JavaEE 7 下？

Servlet 3.1 是在 JavaEE 7 中引入的。

Servlet 3.1 与 Servlet 3.0 有何不同？

关于Servlet 3.1中的新变化，请阅读Arun Gupta的这篇博客文章：Servlet 3.1中有哪些新功能？ - Java EE 7向前发展

我还想知道哪个版本的eclipse支持servlet 3.1开发。

新版本的Eclipse 4.3（名为Kepler）支持Java EE 7技术。参见 Arun Gupta 的博客文章：Eclipse 4.3 中的 Java EE 7 支持