What features are in Servlet 3.0?

Servlet 3.0 aims to offer Web developers greater simplicity and ease of development while adhering to Web 2.0 principles. Key changes from Servlet 2.5 include the following:

• Greater pluggability as a result of Web fragments and new methods to add servlets and filters
• New annotations: Servlet Annotation, Servlet Filter Annotation and Servlet Context Listener Annotation
• Support for asynchronous processing
• Security enhancements related to user authentication

Source link

An Overview of Servlet 3.0

Further Reading

DevX article on Servlet 3.0