shopcart.java

jsp+servlet网上购物,是一个实现mvc的网站

package com.ebook.Util;

import com.ebook.Entity.*;
import java.util.*;

/**
 *
 * @author 隆科
 */
public class shopCart {

    private ArrayList<cartItem> cart;

    public shopCart() {
        cart = new ArrayList<cartItem>();
    }

    public void addcartItem(cartItem item) {
        //  cart.add(item);

        cartItem oldItem = null;
        if (item != null) {
            for (int i = 0; i < cart.size(); i++) {
                oldItem = cart.get(i);
                if (oldItem.getBookid() == item.getBookid()) {
                    oldItem.setQuantity(item.getQuantity() + cart.get(i).getQuantity());
                    return;
                }
            }
            cart.add(item);
        }
    }

    public boolean removeItem(int id) {
        cartItem oldItem = null;
        for (int i = 0; i <cart.size(); i++) {
            oldItem = cart.get(i);
            if (oldItem.getBookid() == id) {
                cart.remove(i);
                return true;
            }

        }
        return false;
    }

    public boolean removeAll() {
        return cart.removeAll(cart);
    }

    public double getTotal() {
        double total = 0.0;
        Iterator iter = cart.iterator();
        while (iter.hasNext()) {
            cartItem item = (cartItem) iter.next();
            total +=
                    item.getTotalPrice();
        }

        return total;
    }

    public ArrayList getCart() {
        return cart;
    }
}