利用集合实现一个简单的购物商城

//运行展示在最后

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import hncu.cn.baseCode.homeWork.shop.bean.Prodect;
import hncu.cn.baseCode.homeWork.shop.bean.ShoppingCar;
//本例没使用到泛型，所以全部的警告都盖掉了
@SuppressWarnings("all")
public class Main {
	private static List listIni = new ArrayList();// 初始化购物商城 集合
	private static ShoppingCar shoppingCar = new ShoppingCar();// 购物车
	private static Scanner scanner = new Scanner(System.in);

	public static void main(String[] args) {
		// 初始化
		init();
		System.out.println("****************欢迎来到老干爹商城*****************");
		while (true) {
			System.out.print("请输入操作序号：< 1.查看商品  2.查看购物车  3.退出系统 >");
			int i = scanner.nextInt();
			switch (i) {
			case 1:
				showPro();// 查看商品,是否购买
				break;
			case 2:
				// 查看购物车，是否结算
				showCar();
				break;
			case 3:
				// 退出
				System.exit(0);
				break;
			default:
				break;
			}
		}
	}

	private static void showCar() {
		if (shoppingCar.getList().size() == 0) {
			System.out.println("你的购物车为空");
		} else {
			shoppingCar.print();//展示购物车
			shoppingCar.settleAccounts();//是否结算
		}
	}

	public static void showPro() {
		// 显示商品
		print(listIni);
		System.out.print("是否购买商品<1.是   2.否>");
		int i = scanner.nextInt();
		if (i == 1) {
			int c = shoppingCar.shop(listIni);
			Prodect p = (Prodect) listIni.get(c);
			int count = p.getCount();
			if(count>0){
				((Prodect) listIni.get(c)).setCount(count--);// (如果没了呢....)
			}else {
				System.out.println("该商品库存为 0，再看看其他商品吧~");
			}
		}
	}

	public static void print(List list) {
		System.out.println("编号\t品名\t价格\t描述\t存货量");
		for (Object object : list) {
			System.out.println(object.toString()+((Prodect)(object)).getCount());
		}
	}

	public static void init() {
		for (int i = 0; i < 5; i++) {
			Prodect prodect = new Prodect(i, "VIVO", 500 * (i + 1), ("VIVO" + i + " 代"), i * i + 10);
			listIni.add(prodect);
		}
	}
}

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import javax.swing.text.StyledEditorKit.ForegroundAction;

@SuppressWarnings("all")
public class ShoppingCar {
	private List list = new ArrayList();

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}

	private int count;

	public ShoppingCar() {
		super();
	}

	public ShoppingCar(int count) {
		super();
		this.count = count;
	}

	public int shop(List li) {
		System.out.print("请输入需要购买的商品编号：");
		int i = new Scanner(System.in).nextInt();
		Prodect po = (Prodect) li.get(i);
		list.add(po);
		return i;// 返回需要购买的编号
	}

	public  void print() {
		System.out.println("编号\t品名\t价格\t描述");
		for (Object object : list) {
			System.out.println(object);
		}
	}
	public void settleAccounts(){
		System.out.println("是否结算？< 1.是  2.否  >");
		int i = new Scanner(System.in).nextInt();
		if(i == 1){
			System.out.println("总金额是："+countMoney());
		}
	}
	public double countMoney(){
		double s = 0;
		for (Object object : list) {
			double price = ((Prodect)(object)).getPrice();
			s += price;
		}
		//清空购物车
		list.removeAll(list);
		return s;
	}
}

@SuppressWarnings("all")
public class Prodect {
	private int id;
	private String name;
	private double price;
	private String diString;// 描述
	private int count;// 总数

	public Prodect(int id, String name, double price, String diString, int count) {
		super();
		this.id = id;
		this.name = name;
		this.price = price;
		this.diString = diString;
		this.count = count;
	}

	public int getCount() {
		return count;
	}

	public void setCount(int count) {
		this.count = count;
	}

	public Prodect() {
		super();
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}

	public String getDiString() {
		return diString;
	}

	public void setDiString(String diString) {
		this.diString = diString;
	}

	@Override
	public String toString() {
		return id + "\t" + name + "\t" + price + "\t" + diString + "\t";
	}

}

下面是运行结果：