黑马程序员——银行业务调度系统

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模拟实现银行业务调度系统逻辑，具体需求如下：

银行内有6个业务窗口，1 - 4号窗口为普通窗口，5号窗口为快速窗口，6号窗口为VIP窗口。

有三种对应类型的客户：VIP客户，普通客户，快速客户（办理如交水电费、电话费之类业务的客户）。

异步随机生成各种类型的客户，生成各类型用户的概率比例为：  VIP客户：普通客户：快速客户  =  1 ：6 ：3。

客户办理业务所需时间有最大值和最小值，在该范围内随机设定每个VIP客户以及普通客户办理业务所需的时间，快速客户办理业务所需时间为最小值（提示：办理业务的过程可通过线程Sleep的方式模拟）。

各类型客户在其对应窗口按顺序依次办理业务。当VIP（6号）窗口和快速业务（5号）窗口没有客户等待办理业务的时候，这两个窗口可以处理普通客户的业务，而一旦有对应的客户等待办理业务的时候，则优先处理对应客户的业务。随机生成客户时间间隔以及业务办理时间最大值和最小值自定，可以设置。

不要求实现GUI，只考虑系统逻辑实现，可通过Log方式展现程序运行结果。

因为银行的每一个客户都是由取号机器来产生的。在程序中将取号机器设置为单例设计模式，这 个取号机器有产生号的功能和叫号的功能。

import java.util.ArrayList;import java.util.List;public class NumberManager {private int lastNumber = 0;        //定义一个数组存取产生的号private List queueNumbers = new ArrayList();//将产生号的方法public synchronized Integer generateNewNumber(){queueNumbers.add(++lastNumber);return lastNumber;}//叫号的方法public synchronized Integer fetchNumber(){if(queueNumbers.size()>0){return (Integer)queueNumbers.remove(0);}else{return null;}}}

有三类客户需要产生三类号码，分别是普通号码、快速号码、VIP号码

public class NumberMachine {private NumberMachine(){}private static NumberMachine instance = new NumberMachine();public static NumberMachine getInstance(){return instance;}private NumberManager commonManager = new NumberManager();private NumberManager expressManager = new NumberManager();private NumberManager vipManager = new NumberManager();         //普通号码管理器public NumberManager getCommonManager() {return commonManager;}         //快速客户号码管理器public NumberManager getExpressManager() {return expressManager;}       //vip客户号码管理器public NumberManager getVipManager() {return vipManager;}}

因为有三类客户所以用枚举成员来模拟三类客户

public enum CustomerType {COMMON,EXPRESS,VIP;public String toString(){String name = null;switch(this){case COMMON:name = "普通";break;case EXPRESS:name = "快速";break;case VIP:name = name();break;}return name;}}

定义一个服务窗口

import java.util.Random;import java.util.concurrent.Executors;import java.util.logging.Logger;public class ServiceWindow {private CustomerType type = CustomerType.COMMON;private int number = 1;public CustomerType getType() {return type;}public void setType(CustomerType type) {this.type = type;}public void setNumber(int number){this.number = number;}public void start(){Executors.newSingleThreadExecutor().execute(new Runnable(){public void run(){while(true){switch(type){case COMMON:commonService();break;case EXPRESS:expressService();break;case VIP:vipService();break;}}}});}private void commonService(){String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始获取普通任务!");Integer serviceNumber = NumberMachine.getInstance().getCommonManager().fetchNumber();if(serviceNumber != null ){System.out.println(windowName + "开始为第" + serviceNumber + "号普通客户服务");int maxRandom = Constants.MAX_SERVICE_TIME - Constants.MIN_SERVICE_TIME;int serviceTime = new Random().nextInt(maxRandom)+1 + Constants.MIN_SERVICE_TIME;try {Thread.sleep(serviceTime);} catch (InterruptedException e) {e.printStackTrace();}System.out.println(windowName + "完成为第" + serviceNumber + "号普通客户服务，总共耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取到普通任务，正在空闲一秒");try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}private void expressService(){Integer serviceNumber = NumberMachine.getInstance().getExpressManager().fetchNumber();String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始获取快速任务!");if(serviceNumber !=null){System.out.println(windowName + "开始为第" + serviceNumber + "号快速客户服务");int serviceTime = Constants.MIN_SERVICE_TIME;try {Thread.sleep(serviceTime);} catch (InterruptedException e) {e.printStackTrace();}System.out.println(windowName + "完成为第" + serviceNumber + "号快速客户服务，总共耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取到快速任务！");commonService();}}private void vipService(){Integer serviceNumber = NumberMachine.getInstance().getVipManager().fetchNumber();String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始获取VIP任务!");if(serviceNumber !=null){System.out.println(windowName + "开始为第" + serviceNumber + "号VIP客户服务");int maxRandom = Constants.MAX_SERVICE_TIME - Constants.MIN_SERVICE_TIME;int serviceTime = new Random().nextInt(maxRandom)+1 + Constants.MIN_SERVICE_TIME;try {Thread.sleep(serviceTime);} catch (InterruptedException e) {e.printStackTrace();}System.out.println(windowName + "完成为第" + serviceNumber + "号VIP客户服务，总共耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取到VIP任务！");commonService();}}}

Constants类

public class Constants {public static int MAX_SERVICE_TIME = 10000; public static int MIN_SERVICE_TIME = 1000; public static int COMMON_CUSTOMER_INTERVAL_TIME = 1; }

模拟业务运行

import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;import java.util.logging.Logger;public class MainClass {public static void main(String[] args) {//产生4个普通窗口for(int i=1;i<5;i++){ServiceWindow window =  new ServiceWindow();window.setNumber(i);window.start();}//产生1个快速窗口ServiceWindow expressWindow =  new ServiceWindow();expressWindow.setType(CustomerType.EXPRESS);expressWindow.start();//产生1个VIP窗口ServiceWindow vipWindow =  new ServiceWindow();vipWindow.setType(CustomerType.VIP);vipWindow.start();//普通客户拿号Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){public void run(){Integer Number = NumberMachine.getInstance().getCommonManager().generateNewNumber();System.out.println("第" +Number + "号普通客户正在等待服务！");}},0,Constants.COMMON_CUSTOMER_INTERVAL_TIME, TimeUnit.SECONDS);//快速客户拿号Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){public void run(){Integer Number = NumberMachine.getInstance().getExpressManager().generateNewNumber();System.out.println("第" +Number + "号快速客户正在等待服务！");}},0,Constants.COMMON_CUSTOMER_INTERVAL_TIME * 2, TimeUnit.SECONDS);//VIP客户拿号Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){public void run(){Integer Number = NumberMachine.getInstance().getVipManager().generateNewNumber();System.out.println("第" +Number + "号VIP客户正在等待服务！");}},0,Constants.COMMON_CUSTOMER_INTERVAL_TIME * 6, TimeUnit.SECONDS);}}

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