cartaction.java

网上购物车的JAVA代码实现版

package feng.shoppingcart.web.action;
import java.util.*;

import org.apache.struts.actions.*;

import javax.servlet.http.*;
import org.apache.struts.action.*;
import feng.shoppingcart.entity.*;
import feng.shoppingcart.biz.*;
import feng.shoppingcart.util.*;
import feng.shoppingcart.web.form.CartForm;


public class CartAction extends LookupDispatchAction{
	String[] product_names;
	String[] product_ids;
	String[] product_numbers;
	@Override
	protected Map getKeyMethodMap() {
		Map map=new HashMap();
		map.put("cart_button_modifynumber", "modifyNumber");
		map.put("cart_button_clearselect","deleteSelectedItem");
		map.put("cart_button_clearcart", "clearCart");
		return map;
	}
	
	public ActionForward modifyNumber(ActionMapping mapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response) throws Exception{
		Cart cart=(Cart)request.getSession(true).getAttribute("cart");
		if(cart!=null){

			HashMap<Integer,Item> items=cart.getItems();
			CartForm cartform=(CartForm)form;
			product_names=null;
			product_numbers=null;
			product_names=cartform.getProduct_names();
			product_numbers=cartform.getProduct_numbers();
			
			if(product_names!=null){

				for(int i=0;i<product_names.length;i++){
					Integer key=Integer.valueOf(product_names[i]);
					Item item=items.get(key);System.out.println("*&&&&&&7&&&**item"+item);
					item.setNumber(Integer.valueOf(product_numbers[i]));
					cart.modigyItemNumber(item);
				}
			}
			request.getSession(true).setAttribute("cart", cart);
			form.reset(mapping, request);
		
		}
		System.out.println("*******************modityOk");
		return mapping.findForward("modifyOk");
	}

	public ActionForward deleteSelectedItem(ActionMapping mapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response) throws Exception{
		Cart cart=(Cart)request.getSession(true).getAttribute("cart");
		if(cart!=null){

			HashMap<Integer,Item> items=cart.getItems();
			CartForm cartform=(CartForm)form;
			product_ids=null;
			product_ids=cartform.getProduct_ids();
			if(product_ids!=null){

				for(int i=0;i<product_ids.length;i++){
					Integer key=Integer.valueOf(product_ids[i]);
					items.remove(key);

				}
			}
			System.out.println("*******************deleteSelectItemOk");
			cart.setItems(items);
			request.getSession(true).setAttribute("cart", cart);
			form.reset(mapping, request);
		
		}
		
		return mapping.findForward("deleteSelectedItemOk");
		
	}
	public ActionForward clearCart(ActionMapping mapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response){
		request.getSession(true).removeAttribute("cart");
		System.out.println("&&&&&&&&&&&&&&&&&&&&&&&& clearOk");
		return mapping.findForward("clearOk");
	}
	
	/*public ActionForward welecome(ActionMapping mapping,ActionForm form,
						HttpServletRequest request,HttpServletResponse response) throws Exception{
		String method=this.getMethodName(mapping, form, request, response, this.getParameter(mapping, form, request, response));
		if(method=="modifyNumber")	return this.modifyNumber(mapping, form, request, response);
		if(method=="deleteSelectedItem")	return this.deleteSelectedItem(mapping, form, request, response);
		if(method=="clearCart")	return this.clearCart(mapping, form, request, response);
		return mapping.findForward("welcomeOk");
	}
	public ActionForward modifyNumber(ActionMapping mapping,ActionForm form,
						HttpServletRequest request,HttpServletResponse response) throws Exception{
		Cart cart=(Cart)request.getSession(true).getAttribute("cart");
		if(cart!=null){

			HashMap<Integer,Item> items=cart.getItems();
			CartForm cartform=(CartForm)form;
			product_names=null;
			product_numbers=null;
			product_names=cartform.getProduct_names();
			product_numbers=cartform.getProduct_numbers();
			
			if(product_names!=null){

				for(int i=0;i<product_names.length;i++){
					Integer key=Integer.valueOf(product_names[i]);
					Item item=items.get(key);System.out.println("*&&&&&&7&&&**item"+item);
					item.setNumber(Integer.valueOf(product_numbers[i]));
					cart.modigyItemNumber(item);
				}
			}
			request.getSession(true).setAttribute("cart", cart);
			form.reset(mapping, request);
		
		}
		System.out.println("*******************modityOk");
		return mapping.findForward("modifyOk");
	}
	public ActionForward deleteSelectedItem(ActionMapping mapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response) throws Exception{
		Cart cart=(Cart)request.getSession(true).getAttribute("cart");
		if(cart!=null){

			HashMap<Integer,Item> items=cart.getItems();
			CartForm cartform=(CartForm)form;
			product_ids=null;
			product_ids=cartform.getProduct_ids();
			if(product_ids!=null){

				for(int i=0;i<product_ids.length;i++){
					Integer key=Integer.valueOf(product_ids[i]);
					items.remove(key);

				}
			}
			System.out.println("*******************deleteSelectItemOk");
			cart.setItems(items);
			request.getSession(true).setAttribute("cart", cart);
		
		}
		
		return mapping.findForward("deleteSelectedItemOk");
	}
	public ActionForward clearCart(ActionMapping mapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response){
		request.getSession(true).removeAttribute("cart");
		System.out.println("&&&&&&&&&&&&&&&&&&&&&&&& clearOk");
		return mapping.findForward("clearOk");
	}
*/
}