java超市购物库存随之减少超市购物程序java

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mob6454cc69d373 2023-06-06 15:42:19

导语：面向对象的笔记还在整理，之前的笔记也有点凌乱，先发一个国庆期间做的一个超市购物的案例。主要的功能是顾客查看，购买，结算商品、管理员添加，删除，查看商品。

1.实体包

//管理员账号实体类
public class Admin {
	private String id;//管理员帐号
	private String passWord;//管理员密码
	
	public Admin() {
		super();
	}
	
	public Admin(String id, String passWord) {
		super();
		this.id = id;
		this.passWord = passWord;
	}
	
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getPassWord() {
		return passWord;
	}
	public void setPassWord(String passWord) {
		this.passWord = passWord;
	}
	
}

//商品实体类
public class Product {
	private int id;//商品序号
	private String name;//商品名称
	private float price;//商品价格
	private int nums;//商品数量
	
	public static Product[] goodList = new Product[200];//存储商品的数组
	
	public Product() {
		super();
	}
	public Product(int num, String name, float price,int nums) {
		super();
		this.id = num;
		this.name = name;
		this.price = price;
		this.nums = nums;
	}
	public int getNums() {
		return nums;
	}
	public void setNums(int nums) {
		this.nums = nums;
	}
	public int getId() {
		return id;
	}
	public void setId(int num) {
		this.id = num;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public float getPrice() {
		return price;
	}
	public void setPrice(float price) {
		this.price = price;
	}
	
}

//购物车实体类
public class ShopCar {
	
	public static Product[] shopCars = new Product[200];//存储商品的数组
	
	public ShopCar() {
		super();
	}

}

2.界面包

import java.util.Scanner;

import util.AdminUtil;
import util.GoodsUtil;

public class AdminUI {
	private static Scanner adminInput = new Scanner(System.in);
	
	//管理员操作界面
	public static void adminUI() {
		int inputNums = 0;
		//管理员账号登陆
		while(true) {
			System.out.println("请输入管理员账号");
			String adminId = adminInput.next();
			System.out.println("请输入管理员密码");
			String passWord = adminInput.next();
			if(adminId.equals( AdminUtil.getAdmin().getId()) && passWord.equals(AdminUtil.getAdmin().getPassWord())){
				break;
			}else {
				if(inputNums == 2) {
					System.out.println("输入次数已上线，退出管理员登陆！");
					return;
				}else {
					System.out.println("账号密码错误");
				}
			}
			inputNums++;
		}
		
		//管理员操作
		while(true) {
			System.out.println("1.管理员添加商品2.管理员删除商品3.显示商品列表4.退出管理员操作");
			int choice = adminInput.nextInt();
			if(choice == 1) {
				System.out.println("请输入商品的编号");
				int id = adminInput.nextInt();
				System.out.println("请输入商品的名字");
				String name = adminInput.next();
				System.out.println("请输入商品的价格");
				float price = adminInput.nextFloat();
				System.out.println("请输入商品的数量");
				int nums = adminInput.nextInt();
				GoodsUtil.addGoods(id, name, price, nums);
			}else if(choice == 2) {
				System.out.println("请输入你要删除的商品的序号");
				int deletenum = adminInput.nextInt();
				GoodsUtil.deleteGoods(deletenum);
			}else if(choice == 3) {
				GoodsUtil.showGoods();
			}else if(choice == 4) {
				break;
			}else {
				System.out.println("请输入正确的数字！");
			}
		}
	}
}

import java.util.Scanner;

import entity.ShopCar;
import util.ShopCarUtil;

public class ShoppingCarUI {
	private static Scanner input = new Scanner(System.in);
	//购物车界面
	public static void shoppingCarUI(){
		
		while(true) {
			ShopCarUtil.showShopCar();
			if(ShopCar.shopCars[0] == null) {
				return;
			}
			System.out.println("1.删除商品2.清空购物车3.返回上一层");
			int choice = input.nextInt();
			if(choice == 1) {
				System.out.println("请输入你要删除商品的序号");
				int deleteNum = input.nextInt();
				ShopCarUtil.deleteAccounts(deleteNum);
			}else if(choice == 2) {
				ShopCarUtil.clearShopCar();
			}else if(choice ==3) {
				break;
			}else {
				System.out.println("输入错误，请输入正确的数字！");
			}
			
		}
	}
}

import java.util.Scanner;

import entity.Product;
import util.ShopCarUtil;
import util.GoodsUtil;

//购物车界面
public class ShoppingUI {
	
	Scanner input = new Scanner(System.in);
	public void showShopping() {
		
		/*
		 * 超市的界面方法
		 */
		while(true) {
			System.out.println("--------------欢迎来到Java超市--------------");
			
			System.out.println("1.显示商品列表2.购买商品3.查看购物车列表4.结算5.管理员登陆6.退出");
			
			int choice = input.nextInt();
			if(choice == 1) {
				GoodsUtil.showGoods();
			}else if(choice == 2){
				int list;
				int nums;
				while(true) {
					System.out.println("请输入你要添加商品的序号");
					list = input.nextInt();
					if(list < GoodsUtil.addProduct) {
						break;
					}else {
						System.out.println("请输入正确的商品序号！");
					}
				}
				while(true) {
					System.out.println("请输入你要添加商品的数量");
					nums = input.nextInt();
					if(nums < Product.goodList[nums - 1].getNums()) {
						break;
					}else {
						System.out.println("商品库存不足，请重新输入！");
					}
				}
				ShopCarUtil.addGoodsCar(list,nums);
				
			}else if(choice ==3) {
				ShoppingCarUI.shoppingCarUI();
			}else if(choice ==4) {
				int allPrice = ShopCarUtil.settleAccounts();
				if(allPrice == 0) {
					System.out.println("请先购买商品！");
					return;
				}
				System.out.println("总价为：" + allPrice);
			}else if(choice ==5) {
				AdminUI.adminUI();
			}else if(choice ==6) {
				System.out.println("期待您的下次光临!");
				break;
			}else {
				System.out.println("请输入正确的数字");
			}
		}
		
	}
}

3.工具包

import entity.Admin;

public class AdminUtil {
	
	//创建管理员帐号
	static Admin admin = new Admin("admin","123456");
	
	public static Admin getAdmin() {
		return admin;
	}
	public static void setAdmin(Admin admin) {
		AdminUtil.admin = admin;
	}
	
	
}

import entity.Product;

//商品工具类
public class GoodsUtil {
	
	private static int numsProduct = 0;//打印商品列表商品的序号
	public static int addProduct = 0;//添加商品的数组角标
	
	//初始化商品
	static {
		Product p1 = new Product(1001,"茄子",1.5f,100);
		Product p2 = new Product(1002,"萝卜",1.7f,100);
		Product p3 = new Product(1003,"黄瓜",2.3f,100);
		Product.goodList[addProduct++] = p1;
		Product.goodList[addProduct++] = p2;
		Product.goodList[addProduct++] = p3;//addProduct = 3
		
		
	}
	
	//显示商品列表
	public static void showGoods() {
		numsProduct = 1;
		System.out.println("序号\t" + "商品编号\t" + "商品名称\t" + "商品价格\t" + "商品数量\t");
		for(Product p :Product.goodList) {
			if(p != null) {
				System.out.print(numsProduct++ + "\t" + p.getId() + "\t" + p.getName() + "\t"  + p.getPrice() + "\t"  + p.getNums() + "\t" );
				System.out.println();
			}else {
				break;
			}
		}
	}
	
	//管理员添加商品
	public static void addGoods(int id,String name,float price,int nums) {
		Product newProduct = new Product(id,name,price,nums);
		Product.goodList[addProduct++] = newProduct;
	}
	
	//管理员删除商品
	public static void deleteGoods(int deletenum) {
		//将商品的后一个商品覆盖前一个商品，来删除商品
		for(int i = deletenum - 1;i < Product.goodList.length;i++ ) {
			if(Product.goodList[i + 1] == null) {
				Product.goodList[i] = Product.goodList[i + 1];
				break;
			}else {
				Product.goodList[i] = Product.goodList[i + 1];
			}
		}
		addProduct--;
	}
	
	
}

import entity.Product;
import entity.ShopCar;

//购物车工具类
public class ShopCarUtil {
	
	private static int nums = 0;
	public static int numsShopCarProduct = 0;
	//添加商品，将商品写入购物车
	public static void addGoodsCar(int id,int goodsNum) {
		Product addGoods = Product.goodList[id - 1];
		Product shopCar = new Product();
		shopCar.setId(addGoods.getId());
		shopCar.setName(addGoods.getName());
		shopCar.setPrice(addGoods.getPrice());
		shopCar.setNums(goodsNum);
		int goodsnums = addGoods.getNums();
		if((goodsnums - goodsNum) >= 0) {
			addGoods.setNums(goodsnums - goodsNum);
		}else {
			System.out.println("库存不足，请重新选择！");
			return;
		}
		ShopCar.shopCars[nums++] = shopCar;
	}
	
	//显示购物车列表
	public static void showShopCar() {
		
		if(ShopCar.shopCars[0] == null) {
			System.out.println("您的购物车是空的，请先购买商品在查看！");
			return;
		}
		
		numsShopCarProduct = 1;
		System.out.println("------------------你的购物车-------------------");
		System.out.println("序号\t" + "商品编号\t" + "商品名称\t" + "商品价格\t" + "商品数量\t");
		for(Product p :ShopCar.shopCars) {
			if(p != null) {
				System.out.print(numsShopCarProduct++ + "\t" + p.getId() + "\t" + p.getName() + "\t"  + p.getPrice() + "\t"  + p.getNums() + "\t" );
				System.out.println();
			}else {
				break;
			}
		}
	}
	
	//结算
	public static int settleAccounts() {
		int allPrice = 0;
		for(Product p :ShopCar.shopCars) {
			if(p != null) {
				allPrice += p.getPrice()*p.getNums();
			}else {
				break;
			}
		}
		return allPrice;
	}
	
	//删除购物车商品
	public static void deleteAccounts(int deletenum) {
		ShopCarUtil.returnNums(deletenum - 1);
		//将商品的后一个商品覆盖前一个商品，来删除商品
		for(int i = deletenum - 1;i < ShopCar.shopCars.length;i++ ) {
			if(ShopCar.shopCars[i + 1] == null) {
				ShopCar.shopCars[i] = ShopCar.shopCars[i + 1];
				break;
			}else {
				ShopCar.shopCars[i] = ShopCar.shopCars[i + 1];
			}
		}
		ShopCarUtil.nums--;
	}
	
	//清空购物车
	public static void clearShopCar() {
		for(int i = 0;i < ShopCar.shopCars.length;i++) {
			if(ShopCar.shopCars[i] != null) {
				ShopCarUtil.returnNums(i);
			}else {
				break;
			}
		}
		
		for(int i = 0;i < ShopCar.shopCars.length;i++) {
			if(ShopCar.shopCars[i] != null) {
				ShopCar.shopCars[i] = null;
			}else {
				break;
			}
		}
	}
	
	//将删除商品的数量返回至商品列表
	public static void returnNums(int deletenum) {
		
		Product delAccount = ShopCar.shopCars[deletenum];
		for(Product p :Product.goodList) {
			if(p.getId() == delAccount.getId()) {
				int nums = p.getNums() + delAccount.getNums();
				p.setNums(nums);
				break;
			}
		}
	}
}

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