黑马程序员——银行业务调度系统的实现

 ------- <a href="http://www.itheima.com" target="blank">android培训</a>

<p>模拟实现银行业务调度系统逻辑，具体需求如下：</p><p> </p><p>Ø 银行内有<span style="font-family:Helvetica 55 Roman;">6</span><span style="font-family:宋体;">个业务窗口，</span><span style="font-family:Helvetica 55 Roman;">1 - 4</span><span style="font-family:宋体;">号窗口为普通窗口，</span><span style="font-family:Helvetica 55 Roman;">5</span><span style="font-family:宋体;">号窗口为快速窗口，</span><span style="font-family:Helvetica 55 Roman;">6</span><span style="font-family:宋体;">号窗口为</span><span style="font-family:Helvetica 55 Roman;">VIP</span><span style="font-family:宋体;">窗口。</span></p><p> </p><p>Ø 有三种对应类型的客户：<span style="font-family:Helvetica 55 Roman;">VIP</span><span style="font-family:宋体;">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）。</span></p><p> </p><p>Ø 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：</p><p> </p><p>        VIP<span style="font-family:宋体;">客户 ：普通客户 ：快速客户  </span><span style="font-family:Helvetica 55 Roman;">=  1 </span><span style="font-family:宋体;">：</span><span style="font-family:Helvetica 55 Roman;">6 </span><span style="font-family:宋体;">：</span><span style="font-family:Helvetica 55 Roman;">3</span><span style="font-family:宋体;">。</span></p><p> </p><p>Ø 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<span style="font-family:Helvetica 55 Roman;">VIP</span><span style="font-family:宋体;">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</span><span style="font-family:Helvetica 55 Roman;">Sleep</span><span style="font-family:宋体;">的方式模拟）。</span></p><p> </p><p>Ø 各类型客户在其对应窗口按顺序依次办理业务。 </p><p> </p><p>Ø 当<span style="font-family:Helvetica 55 Roman;">VIP</span><span style="font-family:宋体;">（</span><span style="font-family:Helvetica 55 Roman;">6</span><span style="font-family:宋体;">号）窗口和快速业务（</span><span style="font-family:Helvetica 55 Roman;">5</span><span style="font-family:宋体;">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。</span></p><p> </p><p>Ø 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。</p><p> </p><p>Ø 不要求实现<span style="font-family:Helvetica 55 Roman;">GUI</span><span style="font-family:宋体;">，只考虑系统逻辑实现，可通过</span><span style="font-family:Helvetica 55 Roman;">Log</span><span style="font-family:宋体;">方式展现程序运行结果。</span></p>

代码实现：

<pre name="code" class="java">import java.util.ArrayList;import java.util.List;/* * 定义一个取票机产生数字 和 柜台叫数字的类  * */public class NumberManager {private int number = 0;private List<Integer> queueNumbers = new ArrayList<Integer>();/* * 注意：在多线程操作的时候在不同函数中操作同一个数据则需要引入同步 * *///生成数字public synchronized Integer generateNumber(){queueNumbers.add(++number);return number;}//取走数字public synchronized Integer fetchNumber(){if(queueNumbers.size()>0){return queueNumbers.remove(0);}else{return null;}}}

/* * 用单例设计模式来定义一个取票机机器类，类中包含三个不同账户的对象 * */public class NumberMachine {private NumberMachine(){}public static NumberMachine instance = new NumberMachine();public static NumberMachine getInstance(){return instance;}//创建一个普通用户private NumberManager commerManager = new NumberManager();//创建一个快速用户private NumberManager expressManager = new NumberManager();//创建一个普通用户private NumberManager vipManager = new NumberManager();public NumberManager getCommerManager() {return commerManager;}public NumberManager getExpressManager() {return expressManager;}public NumberManager getVipManager() {return vipManager;}}

import java.util.Random;import java.util.concurrent.Executors;/* * 定义柜台服务窗口类 * */public class ServiceWindow {//窗口服务类型private CustomerType type = CustomerType.COMMER;//窗口的编号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.newScheduledThreadPool(1).execute(new Runnable(){@Overridepublic void run() {//窗口中循环的为每一个用户服务while(true){switch(type){case COMMER:commerService(); break;case EXPRESS:expressService(); break;case VIP:vipService(); break;}}}});}//普通VIP服务protected void vipService() {String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始取VIP用户任务。");//获取服务编号Integer serviceName = NumberMachine.getInstance().getVipManager().fetchNumber();if(serviceName != null){System.out.println(windowName + "开始为第" + serviceName + "号VIP用户服务" );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) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(windowName + "完成" + serviceName + "号VIP用户，总耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取得VIP用户任务服务");commerService();}}//快速用户服务protected void expressService() {String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始取快速用户任务。");//获取服务编号Integer serviceName = NumberMachine.getInstance().getExpressManager().fetchNumber();if(serviceName != null){System.out.println(windowName + "开始为第" + serviceName + "号快速用户服务" );int serviceTime = Constants.MIN_SERVICE_TIME;try {Thread.sleep(serviceTime);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(windowName + "完成" + serviceName + "号快速用户，总耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取得快速用户服务");commerService();}}//普通用户服务protected void commerService() {String windowName = "第" + number + "号" + type + "窗口";System.out.println(windowName + "开始取普通用户任务。");//获取服务编号Integer serviceName = NumberMachine.getInstance().getCommerManager().fetchNumber();if(serviceName != null){System.out.println(windowName + "开始为第" + serviceName + "号普通用户服务" );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) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(windowName + "完成" + serviceName + "号普通用户，总耗时" + serviceTime/1000 + "秒");}else{System.out.println(windowName + "没有取得普通用户任务，正在休息一秒");try {Thread.sleep(1000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}

import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;/* * 测试银行系统服务 * */public class MainClass {public static void main(String[] args) {// TODO Auto-generated method stub//产生普通用户四个窗口for(int i=1; i<=4; i++){ServiceWindow commerService = new ServiceWindow();commerService.setNumber(i);commerService.start();}//产生一个快速用户窗口ServiceWindow expressService = new ServiceWindow();expressService.setNumber(5);expressService.setType(CustomerType.EXPRESS);expressService.start();//产生一个VIP用户窗口ServiceWindow vipService = new ServiceWindow();vipService.setNumber(6);vipService.setType(CustomerType.VIP);vipService.start();/* * 模拟来银行办理业务的人 * *///普通用户Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){@Overridepublic void run() {Integer serviceNumber = NumberMachine.getInstance().getCommerManager().generateNumber();System.out.println("第" + serviceNumber + "号普通用户正在等待服务！");}}, 0, Constants.COMMER_INTERVAL_TIME, TimeUnit.SECONDS);//快速用户Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){@Overridepublic void run() {Integer serviceNumber = NumberMachine.getInstance().getExpressManager().generateNumber();System.out.println("第" + serviceNumber + "号快速用户正在等待服务！");}}, 0, Constants.COMMER_INTERVAL_TIME*2, TimeUnit.SECONDS);//VIP用户Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable(){@Overridepublic void run() {Integer serviceNumber = NumberMachine.getInstance().getVipManager().generateNumber();System.out.println("第" + serviceNumber + "号VIP用户正在等待服务！");}}, 0, Constants.COMMER_INTERVAL_TIME*6, TimeUnit.SECONDS);}}

public class Constants {//用户服务耗时最大时间10秒public static int MAX_SERVICE_TIME = 10000;//用户服务耗时最小时间public static int MIN_SERVICE_TIME = 1000;//普通用户到达间隔时间1秒public static int COMMER_INTERVAL_TIME = 1;}

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

<a href="http://www.itheima.com" target="blank">java培训</a>、期待与您交流！ ----------