Java實現KFC點餐系統過程解析
阿新 • • 發佈:2020-10-20
這篇文章主要為大家詳細介紹了java實現KFC點餐系統,模擬肯德基快餐店的收銀系統,具有一定的參考價值,感興趣的小夥伴們可以參考一下
同學們應該都去麥當勞或肯德基吃過快餐吧?請同學們參考肯德基官網的資訊模擬肯德基快餐店的收銀系統,合理使用C++/python/Java,結合設計模式(2種以上)至少實現系統的以下功能:
1.正常餐品結算和找零。
2.基本套餐結算和找零。
3.使用優惠劵購買餐品結算和找零。
4.可在一定時間段參與店內活動(自行設計或參考官網資訊)。
5.模擬列印小票的功能(寫到檔案中)。
類圖:
建立IFood介面實現各類食物資訊的列印:
public interface IFood { /** * 列印輸出食物資訊 * @return */ String printMesage(); }
抽象類AbstractBaseFood
public class AbstractBaseFood { // 類別 protected String kind; // 數量 protected int num; // 價格 protected float price; //找零 // 合計 public float totalPrice() { return this.num * this.price; } }
各類果汁的基類Baverage:
public abstract class Beverage extends AbstractBaseFood implements IFood { public String printMesage() { return ("--" + this.kind + "飲料,\t單價:" + this.price + ",\t數量:" + this.num + ",\t合計:" + this.totalPrice()); } }
建立Baverage的具體實現類ChinaBaverage:
public class ChinaBeverage extends Beverage { public ChinaBeverage(int num) { this.kind = "可樂"; this.price = 6.0f; this.num = num; } }
以此類推分別建立 ChickenWing,FrenchFries,Hamburg抽象類和它們的實現類ChinaChickenWing,FrenchFries,Hamburg
建立抽象工廠IKfcFactory:
public interface IKfcFactory { // 生產漢堡 public ChinaHamburg createHamburg(int num); // 生產薯條 public xtx.FrenchFries createFrenchFries(int num); // 生產雞翅 public ChinaChickenWings createChickenWings(int num); // 生產飲料 public ChinaBeverage createBeverage(int num); }
建立IKfcFactory的實現類ChinaFactory:
public class ChinaKfcFactory implements IKfcFactory { // 生產可樂 public ChinaBeverage createBeverage(int num) { return new ChinaBeverage(num); } // 生產奧爾良烤雞翅 public ChinaChickenWings createChickenWings(int num) { return new ChinaChickenWings(num); } // 生產薯條 public ChinaFrenchFries createFrenchFries(int num) { return new ChinaFrenchFries(num); } // 生產麻辣風味雞腿漢堡 public ChinaHamburg createHamburg(int num) { return new ChinaHamburg(num); } }
建立Customer類實現食物的選擇和檔案儲存:
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 { // 抽象工廠 private IKfcFactory kfcFactory; // 構造方法將抽象工廠作為引數傳入 public Customer(IKfcFactory kfcFactory2) { this.kfcFactory = kfcFactory2; } /** * 訂購食物 * @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("---------------------賬單如下---------------------"); bw.newLine(); for(int i=0;i<5;i++){ bw.write(s[i]); bw.newLine(); bw.flush(); } } // 訂購麻辣雞腿漢堡 public float orderHamburg(int num) throws IOException { // 獲得麻辣雞腿漢堡 ChinaHamburg hamburg = kfcFactory.createHamburg(num); // 輸出訂購資訊 System.out.print(hamburg.printMesage()); s[0]=hamburg.printMesage(); System.out.print("\n"); // 返回總價 return hamburg.totalPrice(); } // 訂購奧爾良烤雞翅 public float orderChickenWings(int num) { // 獲得奧爾良烤雞翅 ChinaChickenWings chickenWings = kfcFactory.createChickenWings(num); // 輸出訂購資訊 System.out.print(chickenWings.printMesage()); s[1]=chickenWings.printMesage(); System.out.print("\n"); // 返回總價 return chickenWings.totalPrice(); } // 訂購薯條 public float orderFrenchFries(int num) { // 獲得薯條 ChinaFrenchFries frenchFries = (ChinaFrenchFries) ((IKfcFactory) kfcFactory).createFrenchFries(num); // 輸出訂購資訊 System.out.print(frenchFries.printMesage()); s[2]=frenchFries.printMesage(); System.out.print("\n"); // 返回總價 return frenchFries.totalPrice(); } // 訂購可樂 public float orderBeverage(int num) { // 獲得可樂 ChinaBeverage beverage = kfcFactory.createBeverage(num); // 輸出訂購資訊 System.out.print(beverage.printMesage()); s[3]=beverage.printMesage(); System.out.print("\n"); return beverage.totalPrice(); } //訂購套餐一 public float ordercombo1(int num) { // 獲得可樂 ChinaBeverage beverage = kfcFactory.createBeverage(num); // 獲得麻辣雞腿漢堡 ChinaHamburg hamburg = kfcFactory.createHamburg(num); s[4]=("--套餐一,\t單價:21,\t數量:"+num+"\t\t合計:"+(beverage.totalPrice()+hamburg.totalPrice())+"\n"); System.out.print("--套餐一,\t數量:"+num+"\t\t合計:"+(beverage.totalPrice()+hamburg.totalPrice())+"\n"); return beverage.totalPrice()+hamburg.totalPrice(); } }
MainApp:
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 { /** * 主應用程式方法 * * @param args * @throws IOException */ public static void main(String[] args) throws IOException { /** * 定義一個肯德基(IKfcFactory型別) */ IKfcFactory kfcFactory = (IKfcFactory) new ChinaKfcFactory(); Customer customer = new Customer(kfcFactory); /** * 開始點餐 */ // 一個麻辣雞腿漢堡 Scanner in =new Scanner(System.in); //System.out.print("請輸入付款金額"); System.out.print("-----現有如下產品-----\n"); System.out.print("--麻辣風味漢堡\t單價:15.0.\n--奧爾良風味雞翅\t單價:3.0\n--普通風味薯條\t單價:8.0\n--可樂飲料\t單價:6.0\n--套餐一(麻辣風味漢堡+可樂飲料)\t單價:21\n"); System.out.print("\n-----------------------"); System.out.print("\n請點餐:\n"); System.out.print("請輸入麻辣風味漢堡數量---:"); int a1=in.nextInt(); System.out.print("請輸入奧爾良風味雞翅數量-:"); int a2=in.nextInt(); System.out.print("普通入風味薯條數量------:"); int a3=in.nextInt(); System.out.print("請輸入可樂飲料數量------:"); int a4=in.nextInt(); System.out.print("請輸入套餐份數---------:"); int a5=in.nextInt(); System.out.print("\n------賬單如下-----\n"); float hamhurgMoney = customer.orderHamburg(a1); // 四個奧爾良烤雞翅 float chickenWingsMoney = customer.orderChickenWings(a2); // 一包薯條 float frenchFriesMoney = customer.orderFrenchFries(a3); // 兩杯可樂 float beverageMoney = customer.orderBeverage(a4); float combo1=customer.ordercombo1(a5); // float sum=hamhurgMoney + chickenWingsMoney + frenchFriesMoney + beverageMoney+combo1; customer.showbill(); System.out.println("總計:" + (sum)); System.out.print("請輸入付款金額:"); 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("總計: "+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(); } }
執行結果展示:
檔案儲存:
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