Using Spring MVC 3.1+ WebApplicationInitializer to programmatically configure session-config and error-page

Question

WebApplicationInitializer provides a way to programmatically represent a good portion of a standard web.xml file - the servlets, filters, listeners.

However I have

Answer 1

In web.xml

    3
-->

    

  

Listener Class

public class ProductBidRollBackListener implements HttpSessionListener {

 @Override
 public void sessionCreated(HttpSessionEvent httpSessionEvent) {
    //To change body of implemented methods use File | Settings | File Templates.

 }

 @Override
 public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
    HttpSession session=httpSessionEvent.getSession();
    WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(session.getServletContext());
    ProductService productService=(ProductService) context.getBean("productServiceImpl");
    Cart cart=(Cart)session.getAttribute("cart");
    if (cart!=null && cart.getCartItems()!=null && cart.getCartItems().size()>0){
        for (int i=0; i