java实现KFC点餐系统

public interface IFood {
 /**
 * 打印输出食物信息
 * @return 
 */
 String printMesage();

}

public class AbstractBaseFood {
 // 类别
 protected String kind;
 // 数量
 protected int num;
 // 价格
 protected float price;
 //找零
 // 合计
 public float totalPrice()
 {
 return this.num * this.price;
 }
 
}

public abstract class Beverage extends AbstractBaseFood implements IFood
{

 public String printMesage()
 {
 return ("--" + this.kind + "饮料，\t单价：" + this.price + "，\t数量：" + this.num + "，\t合计：" + this.totalPrice());
 }
}

public class ChinaBeverage extends Beverage
{

 public ChinaBeverage(int num)
 {
 this.kind = "可乐";
 this.price = 6.0f;
 this.num = num;
 }
}

public interface IKfcFactory
{
 // 生产汉堡
 public ChinaHamburg createHamburg(int num);

 // 生产薯条
 public xtx.FrenchFries createFrenchFries(int num);

 // 生产鸡翅
 public ChinaChickenWings createChickenWings(int num);

 // 生产饮料
 public ChinaBeverage createBeverage(int num);
}

public class ChinaKfcFactory implements IKfcFactory
{
 // 生产可乐
 public ChinaBeverage createBeverage(int num)
 {
 return new ChinaBeverage(num);
 }
 // 生产奥尔良烤鸡翅
 public ChinaChickenWings createChickenWings(int num)
 {
 return new ChinaChickenWings(num);
 }

 // 生产薯条
 public ChinaFrenchFries createFrenchFries(int num)
 {
 return new ChinaFrenchFries(num);
 }

 // 生产麻辣风味鸡腿汉堡
 public ChinaHamburg createHamburg(int num)
 {
 return new ChinaHamburg(num);
 }

}

package xtx.factory.custom;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import xtx.ChinaBeverage;
import xtx.ChinaChickenWings;
import xtx.ChinaFrenchFries;
import xtx.IKfcFactory;
import xtx.ChinaHamburg;
public class Customer 
{
 // 抽象工厂
 private IKfcFactory kfcFactory;
 // 构造方法将抽象工厂作为参数传入
 public Customer(IKfcFactory kfcFactory2)
 {
 this.kfcFactory = kfcFactory2;
 }
 /**
 * 订购食物
 * @throws IOException 
 */
 private String s[] =new String[5];
 public void showbill() throws IOException{
 BufferedWriter bw=new BufferedWriter(new FileWriter("D://workspace2Eclipse//xtx//src//xtx//factory//custom//show.txt",true));
 bw.write("---------------------账单如下---------------------");
 bw.newLine();
 for(int i=0;i<5;i++){
 bw.write(s[i]);
 bw.newLine();
 bw.flush();
 }
 }
 // 订购麻辣鸡腿汉堡
 public float orderHamburg(int num) throws IOException 
 {
 // 获得麻辣鸡腿汉堡
 ChinaHamburg hamburg = kfcFactory.createHamburg(num);
 // 输出订购信息
 System.out.print(hamburg.printMesage());
 s[0]=hamburg.printMesage();
 System.out.print("\n");
 // 返回总价
 return hamburg.totalPrice();
 }
 // 订购奥尔良烤鸡翅
 public float orderChickenWings(int num)
 {
 // 获得奥尔良烤鸡翅
 ChinaChickenWings chickenWings = kfcFactory.createChickenWings(num);
 // 输出订购信息
 System.out.print(chickenWings.printMesage());
 s[1]=chickenWings.printMesage();
 System.out.print("\n");
 // 返回总价
 return chickenWings.totalPrice();
 }
 // 订购薯条
 public float orderFrenchFries(int num) 
 {
 // 获得薯条
 ChinaFrenchFries frenchFries = (ChinaFrenchFries) ((IKfcFactory) kfcFactory).createFrenchFries(num);
 // 输出订购信息
 System.out.print(frenchFries.printMesage());
 s[2]=frenchFries.printMesage();
 System.out.print("\n");
 // 返回总价
 return frenchFries.totalPrice();
 }
 // 订购可乐
 public float orderBeverage(int num) 
 {
 // 获得可乐
 ChinaBeverage beverage = kfcFactory.createBeverage(num);
 // 输出订购信息
 System.out.print(beverage.printMesage());
 s[3]=beverage.printMesage();
 System.out.print("\n");
 return beverage.totalPrice();
 }
 //订购套餐一
 public float ordercombo1(int num)
 {
 // 获得可乐
 ChinaBeverage beverage = kfcFactory.createBeverage(num);
 // 获得麻辣鸡腿汉堡
 ChinaHamburg hamburg = kfcFactory.createHamburg(num);
 s[4]=("--套餐一,\t单价：21,\t数量："+num+"\t\t合计："+(beverage.totalPrice()+hamburg.totalPrice())+"\n");
 System.out.print("--套餐一,\t单价：21,\t数量："+num+"\t\t合计："+(beverage.totalPrice()+hamburg.totalPrice())+"\n");
 return beverage.totalPrice()+hamburg.totalPrice();
 }
}

package xtx.factory.itf;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

import xtx.IKfcFactory;
import xtx.factory.custom.Customer;
public class MainApp
{
 /**
 * 主应用程序方法
 * 
 * @param args
 * @throws IOException 
 */
 public static void main(String[] args) throws IOException 
 {
 /**
 * 定义一个肯德基（IKfcFactory类型）
 */
 IKfcFactory kfcFactory = (IKfcFactory) new ChinaKfcFactory();
 Customer customer = new Customer(kfcFactory);
 /**
 * 开始点餐
 */
 // 一个麻辣鸡腿汉堡
 Scanner in =new Scanner(System.in);
 //System.out.print("请输入付款金额");
 System.out.print("-----现有如下产品-----\n");
 System.out.print("--麻辣风味汉堡\t单价：15.0.\n--奥尔良风味鸡翅\t单价：3.0\n--普通风味薯条\t单价：8.0\n--可乐饮料\t单价：6.0\n--套餐一（麻辣风味汉堡+可乐饮料）\t单价：21\n");
 System.out.print("\n-----------------------");
 System.out.print("\n请点餐：\n");
 System.out.print("请输入麻辣风味汉堡数量---：");
 int a1=in.nextInt();
 System.out.print("请输入奥尔良风味鸡翅数量-：");
 int a2=in.nextInt();
 System.out.print("普通入风味薯条数量------：");
 int a3=in.nextInt();
 System.out.print("请输入可乐饮料数量------：");
 int a4=in.nextInt();
 System.out.print("请输入套餐份数---------：");
 int a5=in.nextInt();
 System.out.print("\n------账单如下-----\n");
 float hamhurgMoney = customer.orderHamburg(a1);
 // 四个奥尔良烤鸡翅 
 float chickenWingsMoney = customer.orderChickenWings(a2);
 // 一包薯条
 float frenchFriesMoney = customer.orderFrenchFries(a3);
 // 两杯可乐
 float beverageMoney = customer.orderBeverage(a4);
 float combo1=customer.ordercombo1(a5);
 //
 float sum=hamhurgMoney + chickenWingsMoney + frenchFriesMoney + beverageMoney+combo1;
 customer.showbill();
 System.out.println("总计：" + (sum));
 System.out.print("请输入付款金额:");
 int a=in.nextInt();
 System.out.print("找零："+(a-sum));
 customer.showbill();
 BufferedWriter bw=new BufferedWriter(new FileWriter("D://workspace2Eclipse//xtx//src//xtx//factory//custom//show.txt",true));
 bw.write("总计: "+sum);
 bw.newLine();
 bw.write("付款："+a);
 bw.newLine();
 float y=a-sum;
 bw.write("找零："+y);
 bw.newLine();
 bw.flush();
 bw.close();
 }
}