Programmatic servlet configuration

Servlet 3 allows you to configure your webapplication in Java.
A set of methods have been added to ServletContext to support this, e.g.

• addFilter
• addListener
• addServlet

When your application starts, you can call these methods from a  ServletContextListener:

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@WebListener public class MyServletContextListener implements ServletContextListener {   public void contextInitialized(ServletContextEvent event) {     ServletContext ctx = event.getServletContext();     ServletRegistration servlet = ctx.addServlet ("ProServlet","org.edu.ProServlet");       servlet.addMapping("/dyna/*");   }   public void contextDestroyed(ServletContextEvent event) {} }

After the ServletContext is initialised, you can't call these methods anymore.