Spring 3.1's WebApplicationInitializer Sample

SampleWebAppInitializer.java

 public class SampleWebAppInitializer implements WebApplicationInitializer {

        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();
//            ac.register(AppConfig.java);
            ServletContextListener listener = new ContextLoaderListener(ac);
            servletContext.addListener(listener);

            AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
//            ac.register(WebConfig.class);
            ServletRegistration.Dynamic dispatcher = servletContext.addServlet("spring", new DispatcherServlet(context));
            dispatcher.setLoadOnStartup(1);
            dispatcher.addMapping("/app");
        }
    }