Struts isn't calling my servlet. What am I doing wrong?

Well, basically my struts servlet isn't working right. Please tell me if anything appears wrong below:

Java Resources\src\bo\DisplayCartServlet.java

  package action;

  import java.io.*;
  import java.sql.SQLException;

  import javax.servlet.*;
  import javax.servlet.http.*;
  import org.apache.struts.action.*;

  import bo.*;
  import dao.*;

  public class DisplayCartServlet extends Action
  {
     public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response)
        throws IOException, ServletException
     {

       String forward = new String("success");      ;
        String productCode = request.getParameter("productCode");      

        HttpSession session = request.getSession();

        Cart cart = (Cart) session.getAttribute("cart");  
        if (cart == null)
        {
           cart = new Cart();
           session.setAttribute("cart", cart);
        }

        int 开发者_如何学Goquantity = 1;

        // Get product from product code
        Product product=null;
    try {
        product = ProductDB.selectProduct(productCode);         
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
        session.setAttribute("product", product);

        // If product exists, add or remove from cart
        if (product != null)
        {
            LineItem lineItem = new LineItem();
            lineItem.setProduct(product);
            lineItem.setQuantity(quantity);
            if (quantity > 0)
              cart.addItem(lineItem);
            else
              cart.removeItem(lineItem);
         }
         session.setAttribute("cart", cart);

        return(mapping.findForward(forward));
    }

}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
    <struts>
        <constant name="struts.enable.DynamicMethodInvocation" value="false" />
        <constant name="struts.devMode" value="false" />
                <package name="example" namespace="/example" extends="struts-default">        
                    . . . . 

                    <action name="cart" class="action.DisplayCartServlet" >
                      <result name="success">/example/cart.jsp</result>
                    </action>        

                </package>
     </struts>

listProducts.jsp link that activates the struts and servlet

   <div id="cartLink"><a href="<s:url action="cart?productCode=XM123456"/>">Add to   Cart</a></div>   

Your application isn't working correctly because you have created a Struts 1 Action class but you are trying to configure it with a Struts 2 configuration XML.

Struts 1 and Struts 2 are very different.

Struts 1 Configuration is called struts-config.xml: http://struts.apache.org/dtds/struts-config_1_3.dtd

Struts 2 configuration is called struts.xml: http://struts.apache.org/dtds/struts-2.0.dtd

You created a Struts 1 Action class (which as @BalusC pointed out, is not a Servlet) so you must configure it using struts-config.xml...

Or,

... you have to create a Struts 2 class to match the struts.xml configuration.

Just check the webserver logs and find the proper error.. i.e., any exceptions specific to the problem. which will help you narrow down the problem.