Servlet 3.0 offers some new features, including:
- new annotation types for annotating Servlet classes. These annotation types make the deployment descriptor optional. The deployment descriptor is still needed for more advanced configuration settings.
- asynchronous oprations
- dynamic registration and initializers
- file upload. No need for a separate library
If you already program with Servlet 2.5, you should be able to pick up these new features easily.
subject: Question to Budi: How different is Servlet 3.0 , and does the book bridge the gap?