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

下面是运行结果：