shoppingcartimpl.java

网上购物系统用SSH实现的

package cn.com.tarena.ecport.biz.impl;

import java.util.Iterator;

import cn.com.tarena.ecport.biz.IShoppingCart;
import cn.com.tarena.ecport.pojo.OrderLine;
import cn.com.tarena.ecport.pojo.Orders;
import cn.com.tarena.ecport.pojo.Product;

public class ShoppingCartImpl implements IShoppingCart {

	private Orders order = new Orders();
	
	public void addProduct(Product product, int amount) {
//		得到order中的所有orderLine比较与实参product的id是否相等，相等则在原有基础加上数量
		Iterator it = order.getOrderlines().iterator();
		while(it.hasNext()){
			OrderLine orderLine = (OrderLine)it.next();
			if(orderLine!=null&&product.getProductid()==orderLine.getProduct().getProductid()){
				orderLine.setAmount(orderLine.getAmount()+amount);
				return;
			}
		}
//		执行到这里说明,没有匹配项。所以新增一条
		OrderLine orderLine = new OrderLine();
		orderLine.setAmount(amount);
		orderLine.setProduct(product);
		orderLine.setOrders(order);
		order.getOrderlines().add(orderLine);
		
	}

	public double getTotalPrice() {
		Iterator it = order.getOrderlines().iterator();
		double sum = 0;
		while(it.hasNext()){
			OrderLine orderLine = (OrderLine)it.next();
			sum = sum + orderLine.getProduct().getBaseprice()*orderLine.getAmount();
		}
		order.setCost(sum);
		return sum;
	}

	public void modifyProductAmountById(Long productid, int amount) {
//		得到order中的所有orderLine比较与实参product的id是否相等，相等则在原有基础加上数量
		Iterator it = order.getOrderlines().iterator();
		while(it.hasNext()){
			OrderLine orderLine = (OrderLine)it.next();
			if(orderLine!=null&&productid==orderLine.getProduct().getProductid()){
				orderLine.setAmount(amount);
				return;
			}
		}
	}

	public void removeAllProducts() {
		order.getOrderlines().clear();

	}

	public void removeProductById(Long productid) {
		Iterator it = order.getOrderlines().iterator();
		OrderLine orderLine = null;
		while(it.hasNext()){
			orderLine = (OrderLine)it.next();
			if(orderLine!=null&&productid==orderLine.getProduct().getProductid()){
				break;
			}
		}
		if(orderLine!=null){
			order.getOrderlines().remove(orderLine);
		}
	}

	public Orders getOrder() {
		return order;
	}
	
}