博客

1.首先创建用户，资源，操作三个包

package yonhu;
package resource;
package operation;

2.在用户包下，我们可以选择购买商品，展示商品或管理商品，其中管理商品时需要输入管理员密码

package yonhu;
import java.util.*;

import operation.Goumai;
import operation.Jieshu;
import resource.Zhanshi;
import operation.Guanli;
public class Main
{
	public static void main(String args[]){
		Scanner in=new Scanner(System.in);
		int n;
		System.out.println("欢迎光临");
		Goumai goumai=new Goumai();
		Zhanshi zhanshi=new Zhanshi();
		Guanli guanli=new Guanli();
		Jieshu jieshu=new Jieshu();
		
		while(true){
			System.out.println("您要进行的操作：1.购买商品2.展示商品3.管理人员操作4.结束");
			n=in.nextInt();
			if(n==1){
				 goumai.buy();
			}
			else if(n==2){
				
				zhanshi.show();
			}
			else if(n==3){
				
				guanli.regulate();
			}
			else if(n==4){
				jieshu.tuichu();
				break;
			}

		}
		
	}
}

3.在商品包中，创建基本商品对象以及其基本属性：名称，数量，价格。

package resource;
 public class Zhanshi{
	
	private int price;
	private int num;
	public  void main(String args[]){
	show();
}	
	public Zhanshi(){

	}
	public Zhanshi(int price,int num){
		
		this.price=price;
		this.num=num;
	}
	public void setPrice(int price){
		this.price=price;
	}
	public int getPrice(){
		return this.price;
	}
	public void setNum(int num){
		this.num=num;
	}
	public int getNum(){
		return this.num;
	}
	public  void show(){
		System.out.println("1.可乐 2.雪碧 3.冰红茶 4.绿茶");
		
	}

}

4.操作包中，我们可进行，购买，管理和结束三个操作，进行购买时：

package operation;
import resource.Zhanshi;
import java.util.Scanner;
public class Goumai{
	Zhanshi cola=new Zhanshi(3,30);
	Zhanshi xuebi=new Zhanshi(3,30);
	Zhanshi redtea=new Zhanshi(4,30);
	Zhanshi greentea=new Zhanshi(4,30);
	public  void main(String[] args){
		buy();
	}
		public  void buy(){
			int x,y;
	Scanner in=new Scanner(System.in);
	System.out.println("有以下几种商品");
	Zhanshi zhanshi= new Zhanshi();
    zhanshi.show();
	System.out.println("您要购买的商品是：");
		x=in.nextInt();
		if(x==1){
			System.out.println("价格："+cola.getPrice()+"库存:"+cola.getNum());
			
		}
		else if(x==2){
			System.out.println("价格："+xuebi.getPrice()+"库存:"+xuebi.getNum());
			
		}
		else if(x==3){
			System.out.println("价格："+redtea.getPrice()+"库存:"+redtea.getNum());
			
		}
		else if(x==4){
			System.out.println("价格："+greentea.getPrice()+"库存:"+greentea.getNum());
			
		}
		System.out.println("您要购买的数量是：");
		y=in.nextInt();
		int sum=0;
		if(x==1){
			sum+=3*y;
			cola.setNum(30-y);
		}
		else if(x==2){
			sum+=3*y;
			xuebi.setNum(30-y);
			//ystem.out.println(xuebi.getNum());
		}
		else if(x==3){
			sum+=4*y;
			redtea.setNum(30-y);
		}
		else if(x==4){
			sum+=4*y;
			greentea.setNum(30-y);
		}
		System.out.println("您要支付的金额为："+sum);
		
}
		}

进行管理操作时：

package operation;
import java.util.*;

public class Guanli
{	
	public  void main(String[] args){
		regulate();
	}
	public void regulate(){
		int x;
		Scanner in=new Scanner(System.in);
		
		
		int count=0;
		while(true){
			System.out.println("请输入管理员密码：");
			x=in.nextInt();
		if(x==1234){
			System.out.println("密码正确");
			System.out.println("已打开仓门，请增添商品");
			break;
		}
		else{
			System.out.println("密码错误，请重新输入");
			count++;
			if(count==5){
				System.out.println("密码错误次数过多");
				break;
			}
		}
	}
	}
}

进行结束操作时：

package operation;
public class Jieshu
{
	public  void main(String[] args) {
		tuichu();
	}
	
		

public  void tuichu(){
	System.out.println("欢迎下次光临");
}
}