Question

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 quantity = 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>   

Answer 1

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.