黑马Java学习笔记之-----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。
NumberManager类:产生号码,取走号码
import java.util.ArrayList; import java.util.List; public class NumberManager { private int lastNumber=1; private List<Integer> queueNumbers=new ArrayList<Integer>(); public synchronized Integer generateNewManager(){ queueNumbers.add(lastNumber); return lastNumber++; } public synchronized Integer fetchServiceNumber(){ if(queueNumbers.size()>0){ return (Integer)queueNumbers.remove(0); }else{ return null; } } }
NumberMachine:对普通,快速,vip号码(客户)NumberManager进行管理。
public class NumberMachine { private NumberManager commonManager=new NumberManager(); private NumberManager expressManager=new NumberManager(); private NumberManager vipManager=new NumberManager(); public NumberManager getCommonManager() { return commonManager; } public NumberManager getExpressManager() { return expressManager; } public NumberManager getVipManager() { return vipManager; } //以下为单例设计模式 private NumberMachine(){} public static NumberMachine getInstance(){ return instance; } private static NumberMachine instance=new NumberMachine(); }
定义窗口为客户服务时间
public class constant { public static int MAX_SERVICE_TIME=10000; public static int MIN_SERVICE_TIME=1000; public static int COMMON_CUSTOMER_TIME=1; }
定义枚举,3个窗口类型:
public enum CustomerType { COMMON,EXPRESS,VIP; public String toString(){ switch(this){ case COMMON: return "普通"; case EXPRESS: return "快速"; case VIP: return "VIP"; } return null; } }
主函数MainClass:
import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; public class MainClass { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub //产生4个普通窗口,也就是四个线程,来调用另一个重要的类的start()里面的方法,理解为4个窗口去号码产生器取号(但是号可能是vip,普通,快速3种) for (int i = 1; i < 5; i++) { ServiceWindow commonWindow=new ServiceWindow(); commonWindow.setWindowId(i); commonWindow.start(); } //产生1个vip窗口,也就是1个线程,去取号 ServiceWindow vipWindow=new ServiceWindow(); vipWindow.setType(CustomerType.VIP); vipWindow.start(); //产生1个快速窗口,也就是1个线程,去取号 ServiceWindow expressWindow=new ServiceWindow(); expressWindow.setType(CustomerType.EXPRESS); expressWindow.start(); //一个线程产生普通客户(普通号码) Executors.newScheduledThreadPool(1).scheduleAtFixedRate( new Runnable(){ public void run(){ Integer number=NumberMachine.getInstance().getCommonManager().generateNewManager(); System.out.println(number + "号普通客户等待服务"); } }, 0, constant.COMMON_CUSTOMER_TIME, TimeUnit.SECONDS); //一个线程产生vip客户(vip号码) Executors.newScheduledThreadPool(1).scheduleAtFixedRate( new Runnable(){ public void run(){ Integer number=NumberMachine.getInstance().getVipManager().generateNewManager(); System.out.println(number + "号vip客户等待服务"); } }, 0, constant.COMMON_CUSTOMER_TIME*6, TimeUnit.SECONDS); //一个线程产生快速客户(快速号码) Executors.newScheduledThreadPool(1).scheduleAtFixedRate( new Runnable(){ public void run(){ Integer number=NumberMachine.getInstance().getExpressManager().generateNewManager(); System.out.println(number + "号快速客户等待服务"); } }, 0, constant.COMMON_CUSTOMER_TIME*2, TimeUnit.SECONDS); } }
ServiceWindow类:来模拟窗口取号过程
import java.util.Random; import java.util.concurrent.Executors; import java.util.Random; import java.util.concurrent.Executors; public class ServiceWindow { private CustomerType type=CustomerType.COMMON; private int windowId=1; public void setType(CustomerType type) { this.type = type; } public void setWindowId(int windowId) { this.windowId = windowId; } 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"+windowId+"号"+type+"窗口"; System.out.println(windowName+"正在获取普通客户任务"); Integer number=NumberMachine.getInstance().getCommonManager().fetchServiceNumber(); if (number!=null) { System.out.println(windowName+"取到普通客户任务"); long beginTime=System.currentTimeMillis(); int maxRand=constant.MAX_SERVICE_TIME-constant.MIN_SERVICE_TIME; long serviceTime=new Random().nextInt(maxRand)+1+constant.MIN_SERVICE_TIME; try { Thread.sleep(serviceTime); } catch (InterruptedException e) { e.printStackTrace(); } long costTime=System.currentTimeMillis()-beginTime; System.out.println(windowName + "为第" + number + "个普通客户完成服务,耗时"+costTime/1000+"秒"); }else{ System.out.println(windowName+"号没有取到普通客户任务"); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } private void expressService() { String windowName=type+"窗口"; System.out.println(windowName+"正在获取快速客户任务"); Integer number=NumberMachine.getInstance().getExpressManager().fetchServiceNumber(); if (number!=null) { System.out.println(windowName+"取到快速客户任务"); try { Thread.sleep(constant.MIN_SERVICE_TIME); } catch (InterruptedException e) { e.printStackTrace(); } long costTime=constant.MIN_SERVICE_TIME; System.out.println(windowName + "为第" + number + "个快速客户完成服务,耗时"+costTime/1000+"秒"); }else{ System.out.println(windowName+"号没有取到快速客户任务"); commonService(); } } private void vipService() { String windowName=type+"窗口"; System.out.println(windowName+"正在获取VIP客户任务"); Integer number=NumberMachine.getInstance().getVipManager().fetchServiceNumber(); if (number!=null) { System.out.println(windowName+"取到VIP客户任务"); long beginTime=System.currentTimeMillis(); int maxRand=constant.MAX_SERVICE_TIME-constant.MIN_SERVICE_TIME; long serviceTime=new Random().nextInt(maxRand)+1+constant.MIN_SERVICE_TIME; try { Thread.sleep(serviceTime); } catch (InterruptedException e) { e.printStackTrace(); } long costTime=System.currentTimeMillis()-beginTime; System.out.println(windowName + "为第" + number + "个VIP客户完成服务,耗时"+costTime/1000+"秒"); }else{ System.out.println(windowName+"号没有取到VIP客户任务"); commonService(); } } }