What are the differences between Servlet 2.5 and 3?

Question

I\'m rolling J2EE code that adheres to Servlet 2.5 and I\'m wondering what are the major differences between 2.5 and 3. Pointers to official Sun docs and personal experience

Answer 1

As Don mentioned, the main areas of improvements and additions are:

• Pluggability (modularizing of web.xml)
• Ease of development (annotations, generics, convention over configuration)
• Async servlet support (for comet style programming, async web proxy, async web services)
• Security enhancements (programmatic login/logout)
• Others (HttpOnly Cookie, Session tracking, EJB in WAR file)

Check out the Javaone 2008 presentation "Java Servlet 3.0 API: What's new and exciting" for details.