Java电子商城项目控制台版（面向对象版）

 

 

基于面向对象的方式编程

根据商城菜单分析如下的对象的内容：

对象	属性	行为
用户	用户名和密码	注册，登录，购买，查看
管理员	用户名和密码	添加，修改，删除
商城	当前登录用户 管理员 商品集合 用户集合 扫描器	显示菜单的方法 获取用户输入的菜单 判断用户输入的菜单
商品	编号，名称，价格，数量

User类：

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.Scanner;
/**
 * User
 * 这个been类实现了Serializable这个接口（实现文件读写（序列化））
 * 所具有的属性：用户名,密码
 * 所具有的行为:注册，登录，购买，查看
 * @author 
 *
 */
public class User implements Serializable{
	String username;
	String userpwd;
	Goods goods = new Goods();
	//验证是否登录
	private boolean isLogin;
	
	
	public boolean isLogin() {
		return isLogin;
	}

	public void setLogin(boolean isLogin) {
		this.isLogin = isLogin;
	}

	/*
	 * 校验用户名合法性
	 */
	private boolean checkUsername(String username) {
		//定义一个为false的bool值
		boolean res = false;
		//用户名长度不满6位，则重新输入
		if (username.length() != 6) {
			System.out.println("用户名长度必须为6位");
			return res;
		} else if (Character.isDigit(username.charAt(0))) {//用户名不能以数字开头，则重新输入
			System.out.println("用户名不能以数字开头");
			return res;
		} else {
			//成功，返回true，继续下一步操作
			return res = true;
		}
	}
	
	/*
	 * 购买商品的方法
	 */
	public void buy() {
		while (true) {
			System.out.println("请选择您需要购买商品的编号：");
			int id = Shop.sc.nextInt();
			System.out.println("您将要的购买的商品信息如下：");
			Goods shopGoods = this.findGoodsById(id);
			System.out.println(shopGoods);
			System.out.println("请输入您需要购买商品的数量：");
			int num = Shop.sc.nextInt();

			Goods myGoods = new Goods();
//			myGoods.setId(shopGoods.getId());
//			myGoods.setName(shopGoods.getName());
//			myGoods.setPrice(shopGoods.getPrice());
			//通过clone()方法，就省去了以上备注释的内容
			myGoods = shopGoods.clone();
			myGoods.setNum(num);
			//将已选择的商品添加到我的商品集合中
			Shop.myGoodsList.add(myGoods);
			System.out.println("是否继续Y/N");
			String choice = Shop.sc.next();
			choice = choice.toUpperCase();
			if (choice.equals("N")) {
				break;
			}
		}
		this.showMyGoodsList();
	}
	/*
	 * 展示已购买的商品信息
	 */
	private void showMyGoodsList() {
		System.out.println("******您购买的商品列表如下******");
		BigDecimal total = new BigDecimal("0");
		for (Goods myGoods : Shop.myGoodsList) {
			System.out.println(myGoods);
			//将在buy()方法中储存的信息提取出来，获取商品的价格
			BigDecimal price = myGoods.getPrice();
			//获取商品的数量
			int num = myGoods.getNum();
			//计算
			total = total.add(price.multiply(new BigDecimal(num)));
			//total = total.add(myGoods.getPrice().multiply(new BigDecimal(myGoods.getNum())));
		}
		System.out.println("总价格为：" + total);
	}
	/*
	 * 注册方法
	 */
	public void registUser() {
		//校验用户名合法性的标识
		boolean isCheck = true;

		while (true) {
			System.out.println("欢迎注册");
			System.out.println("请输入用户名");
			Shop.sc = new Scanner(System.in);
			String rusername = Shop.sc.next();
			//校验结果的返回值
			isCheck = this.checkUsername(rusername);

			System.out.println(isCheck);

			if (isCheck == true) {
				System.out.println("请输入密码");
				String ruserpwd = Shop.sc.next();
				System.out.println("请再次输入密码");
				String reuserpwd = Shop.sc.next();
				if (ruserpwd.equals(reuserpwd)) {
					User user = new User();
					user.setUsername(rusername);
					user.setUserpwd(ruserpwd);
					Shop.userList.add(user);
					System.out.println("注册成功");
					//用户注册成功则将用户的注册信息保存到Userfile文件中
					Shop.saveListToFile();
					break;
				} else {
					System.out.println("密码不一致请重新输入");
				}
			}
		}

	}
	/*
	 * 登录方法
	 */
	public void login() {
		boolean loginResult = false;
		int maxTime = 0;
		while (true) {
			if (maxTime != 3) {
				maxTime++;
				System.out.println("欢迎登录");
				System.out.println("请输入用户名");
				Shop.sc = new Scanner(System.in);
				String username = Shop.sc.next();
				System.out.println("请输入密码");
				String userpwd = Shop.sc.next();
				for (User user : Shop.userList) {
					if (username.equals(user.username) && userpwd.equals(user.userpwd)) {
						System.out.println("登录成功");
						this.setLogin(true);
						loginResult = true;
						break;
					}
				}
				if (loginResult == true) {
					break;
				} else {
					if (maxTime != 3) {
						System.out.println("登录失败账号或密码有误,请重新登录");
					}
				}

			} else {
				System.out.println(maxTime + "次登录失败，系统退出");
				System.exit(0);
			}

		}
	}
	/*
	 * 展示商品信息
	 */
	public void showGoodsList() {
		System.out.println("******商品列表如下******");
//		Shop.readGoods2File();
//		for (Goods goods : Shop.goodsList) {
//			System.out.println(goods);
//		}
		goods.initGoodsList();
		
	}
	/*
	 * 查找商品的方法
	 */
	public Goods findGoodsById(int id) {

		Goods returnGoods = null;
		for (Goods goods : Shop.goodsList) {
			if (goods.getId() == id) {
				returnGoods = goods;
				break;
			}
		}
		return returnGoods;
	}

	public User() {
		super();
	}

	public User(String username, String userpwd) {
		super();
		this.username = username;
		this.userpwd = userpwd;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getUserpwd() {
		return userpwd;
	}

	public void setUserpwd(String userpwd) {
		this.userpwd = userpwd;
	}

}

Admin类：

import java.math.BigDecimal;
/**
 * Admin
 * 这个been类继承了User（Admin为User的子类）
 * 所具有的属性：用户名和密码
 * 所具有的行为：添加，修改，删除
 * @author 
 *
 */
public class Admin extends User {
	/*
	 * 管理员登录
	 */
	public void adminLogin() {

		System.out.println("欢迎管理员登录");
		System.out.println("请输入管理员账号");
		String admin = Shop.sc.next();
		while (true) {
			System.out.println("请输入管理员密码");
			String password = Shop.sc.next();
			if (admin.equals("admin") && password.equals("123456")) {
				System.out.println("管理员登录成功");
				while (true) {
					int choice = this.showAdminMenu();

					if (choice == 5) {
						break;
					}

					this.choiceAdminMenu(choice);
				}
				break;
			} else {
				System.out.println("登录失败");
			}
		}
	}
	/*
	 * 展示管理员菜单
	 */
	public int showAdminMenu() {
		System.out.println("*****************欢迎进入管理员菜单**************");
		System.out.println("\t1.添加商品");
		System.out.println("\t2.修改商品");
		System.out.println("\t3.删除商品");
		System.out.println("\t4.查看商品列表");
		System.out.println("\t5.退出");
		System.out.println("******************************************");
		System.out.print("请选择菜单：");
		int choice = Shop.sc.nextInt();
		return choice;
	}
	/*
	 * 判断是否继续的方法
	 */
	public String isGo_on() {
		System.out.println("您是否继续：Y/N");
		String go_on = Shop.sc.next();
		return go_on.toUpperCase();
	}
	/*
	 * 菜单选择方法
	 */
	public boolean choiceAdminMenu(int choice) {
		boolean result = true;
		String go_on = "Y";
		switch (choice) {
		case 1:
			System.out.println("你选择的是添加商品");
			//当go_on为Y时，则继续执行添加商品操作
			while (go_on.equals("Y")) {
				this.addGoods();
				go_on = this.isGo_on();
			}
			break;
		case 2:
			System.out.println("你选择的是修改商品");
			this.updateGoods();
			break;
		case 3:
			System.out.println("你选择的是删除商品");
			this.deleteGoods();
			break;
		case 4:
			System.out.println("你选择的是查看商品列表");
			super.showGoodsList();
			break;
		case 5:
			System.out.println("退出");
			result = false;
			break;
		default:
			System.out.println("输入有误");
			break;
		}
		return false;
	}
	/*
	 * 删除商品方法
	 */
	public void deleteGoods() {
		System.out.println("****开始修改商品信息****");
		System.out.println("请输入要修改的商品编号：");
		int id = Shop.sc.nextInt();
		Goods goods = super.findGoodsById(id);
		Shop.goodsList.remove(goods);
		System.out.println("商品删除成功");
		Shop.saveGoods2File();
	}
	/*
	 * 修改商品方法
	 */
	public void updateGoods() {
		System.out.println("****开始修改商品信息****");
		System.out.println("请输入要修改的商品编号：");
		int id = Shop.sc.nextInt();
		Goods goods = super.findGoodsById(id);
		
		if (goods == null) {
			System.out.println("未找到该商品");
		} else {
		
			System.out.println("商品信息如下：");
			System.out.println("商品编号\t商品名称\t商品价格\t商品数量\t");
			System.out.println(
					goods.getId() + "\t" + goods.getName() + "\t" + goods.getPrice() + "\t" + goods.getNum() + "\t");
		}
		System.out.println("请输入修改后的商品名称：");
		String name = Shop.sc.next();
		goods.setName(name);
		System.out.println("请输入修改后的商品价格：");
		double price = Shop.sc.nextDouble();
		goods.setPrice(new BigDecimal(price));
		System.out.println("请输入修改后的商品数量：");
		int num = Shop.sc.nextInt();
		goods.setNum(num);
		Shop.saveGoods2File();
	}

	
	/*
	 * 添加商品方法
	 */
	public void addGoods() {

		System.out.println("****开始添加商品****");
		System.out.println("请输入商品编号：");
		int id = Shop.sc.nextInt();
		System.out.println("请输入商品名称：");
		String name = Shop.sc.next();
		System.out.println("请输入商品价格：");
		String price = Shop.sc.next();
		System.out.println("请输入商品数量：");
		int num = Shop.sc.nextInt();

		Goods goods = new Goods();
		goods.setId(id);
		goods.setName(name);
		goods.setPrice(new BigDecimal(price));
		goods.setNum(num);
		Shop.goodsList.add(goods);
		System.out.println("商品添加成功");
		Shop.saveGoods2File();
	}

	
}

Shop类：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
/**
 * 商城类
 * 所具有的属性：当前登录用户，管理员，商品集合，用户集合，扫描器
 * 所具有的行为：显示菜单的方法，获取用户输入的菜单，判断用户输入的菜单
 * @author 
 *
 */
public class Shop {
	//定义一个全局变量的扫描i去,用于用户输出
	static Scanner sc = new Scanner(System.in);
	//定义一个goodsList容器存放商品信息
	static List goodsList = new ArrayList();
	//定义一个myGoodsList容器存购买的放商品信息
	static List myGoodsList = new ArrayList();
	//定义一个userList容器存放用户信息
	static List userList = new ArrayList();
	static File userFile = new File("E:\\workspace2\\ConsolShop1.8\\src\\com\\test\\shop\\Userfile");
	static File goodsFile = new File("E:\\workspace2\\ConsolShop1.8\\src\\com\\test\\shop\\Goodsfile");
	User user = new User();
	Admin admin = new Admin();
	Goods goods = new Goods();
	
	public static void saveGoods2File(){
		try {
			FileOutputStream fos = new FileOutputStream(goodsFile);
			ObjectOutputStream oos = new ObjectOutputStream(fos);
			oos.writeObject(goodsList);
			oos.close();
			fos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static void readGoods2File(){
		try {
			FileInputStream fis = new FileInputStream(goodsFile);
			ObjectInputStream ois = new ObjectInputStream(fis);
			Object obj = ois.readObject();
			goodsList = (List) obj;
			ois.close();
			fis.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	public static void saveListToFile(){
		try {
			FileOutputStream fos = new FileOutputStream(userFile);
			ObjectOutputStream oos = new ObjectOutputStream(fos);
			oos.writeObject(userList);
			oos.close();
			fos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public void readListFromFile(){
		try {
			FileInputStream fis = new FileInputStream(userFile);
			ObjectInputStream ois = new ObjectInputStream(fis);
			Object obj = ois.readObject();
			userList = (List) obj;
			ois.close();
			fis.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	public static void main(String[] args) {
		Shop shop = new Shop();
		shop.run();
	}
	
	private void run() {
		this.readListFromFile();
		//设定一个是否退出的条件
		boolean isBreak = true;
		while (isBreak) {
			int choice = this.showMenu();
			//当choice选择为6事，返回的值为false，同时将值赋给了isBreak，并退出菜单
			isBreak = this.chooseMenu(choice);
		}
	}
	
	/*
	 * 菜单展示
	 */
	private int showMenu() {
		System.out.println("*****************欢迎进入电子商城**************");
		System.out.println("\t1.注册");
		System.out.println("\t2.登录");
		System.out.println("\t3.查看商城");
		System.out.println("\t4.查看我购买的商品（我的购物车）");
		System.out.println("\t5.管理员登录");
		System.out.println("\t6.退出系统");
		System.out.println("******************************************");
		System.out.print("请选择菜单：");
		int choice = sc.nextInt();
		return choice;
	}
	
	/*
	 * 菜单选择
	 */
	private boolean chooseMenu(int choice) {
		boolean result = true;
		switch (choice) {
		case 1:
			System.out.println("你选择的菜单是：注册");
			user.registUser();
			break;
		case 2:
			System.out.println("你选择的菜单是：登录");
			user.login();
			break;
		case 3:
			System.out.println("你选择的菜单是：查看商城");
			goods.initGoodsList();
			//判断用户是否登录
			if(user.isLogin() == true){//成功登录，则可以进行购买操作
				user.buy();
			}else{
				System.out.println("你还未登录，请先登录，在购买商品");
			}
			break;
		case 4:
			System.out.println("你选择的菜单是：查看我购买的商品（我的购物车）");
			break;
		case 5:
			System.out.println("管理员登录");
			admin.adminLogin();
			break;
		case 6:
			System.out.println("谢谢使用");
			result = false;
			break;
		default:
			System.out.println("输入有误");
			break;
		}
		return result;
	}
	
	
}

Goods类：

import java.io.Serializable;
import java.math.BigDecimal;
/**
 * Goods
 * 这个been类需要先实现Comparable, Cloneable, Serializable这三个接口
 * 分别意思为：实现排序方法，实现clone对象方法，实现文件读写（序列化）
 * 所具有的属性：编号，名称，价格，数量
 * @author 
 *
 */
public class Goods implements Comparable, Cloneable, Serializable {
	private int id;
	private String name;
	private BigDecimal price;
	private int num;
	
	/**
	 * 重写clone方法
	 */
	public Goods clone(){
		Goods g1 = new Goods();
		try {
			g1 = (Goods) super.clone();
		} catch (CloneNotSupportedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return g1;
	}
	/*
	 * 初始化商品
	 */
	public void initGoodsList() {
		Goods goods1 = new Goods(1, "iPhone7Plus", new BigDecimal("4999"), 5);
		Goods goods2 = new Goods(2, "iPhone8Plus", new BigDecimal("6999"), 10);
		Goods goods3 = new Goods(3, "iPhoneXMax", new BigDecimal("11999"), 25);
		//将商品信息添加到商品集合中
		Shop.goodsList.add(goods1);
		Shop.goodsList.add(goods2);
		Shop.goodsList.add(goods3);
		//循环遍历显示商品信息
		for (Goods goods : Shop.goodsList) {
			System.out.println(goods);
		}
		//读取Goodsfile中的商品信息到控制台
		Shop.readGoods2File();
	}

	public Goods() {
		super();
	}

	public Goods(int id, String name, BigDecimal price, int num) {
		super();
		this.id = id;
		this.name = name;
		this.price = price;
		this.num = num;
	}

	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 BigDecimal getPrice() {
		return price;
	}

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

	public int getNum() {
		return num;
	}

	public void setNum(int num) {
		this.num = num;
	}

	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "[id = " + id + ",name = " + name + ",price = " + price + ",num = " + num + "]";
	}

	// 商品的排序
	@Override
	public int compareTo(Object o) {
		Goods goods = (Goods) o;
		// if(this.num < goods.num){
		// //小于
		// return -1;
		// } else if(this.num == goods.num){
		// //等于
		// return 0;
		// } else{
		// //大于
		// return 1;
		// }
		return this.compareTo(goods.price);
	}
}