shoppingcartimpl.java

本系统是网上购物的详细代码

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

import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

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

public class ShoppingCartImpl implements IShoppingCart{
	private Map<Long, OrderLine> map = new TreeMap<Long, OrderLine>();

	public void addProduct(Product product, int amount) {
		Long productId = product.getProductid();
		if (map.containsKey(productId)) {
			OrderLine orderLine = map.get(productId);
			int total = orderLine.getAmount()+amount;
			orderLine.setAmount(total);
			map.put(productId, orderLine);
		} else {
			OrderLine orderLine = new OrderLine(amount);
			orderLine.setAmount(amount);
			orderLine.setProduct(product);
			map.put(productId, orderLine);
		}
	}

	public double getTotalPrice() {
		Set<Long> set  = map.keySet();
		double totalPrice = 0;
		for(Long productid : set){
			OrderLine orderLine = map.get(productid);
			int num = orderLine.getAmount();
			double basePrice = orderLine.getProduct().getBaseprice();
			double price = basePrice*num;
			totalPrice+=price;
		}
		return totalPrice;
	}

	public void modifyProductAmountById(Long productid, int amount) {
		OrderLine orderLine = map.get(productid);
		orderLine.setAmount(amount);
		map.put(productid, orderLine);
	}

	public void removeAllProducts() {
		map = new TreeMap<Long, OrderLine>();
	}

	public void removeProductById(Long productId) {
		map.remove(productId);
	}

	public Map<Long, OrderLine> getOrderLineMap() {
		return map;
	}
	
}