黑马程序员_java进阶之面试题:模拟银行业务调度系统

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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。

 

分析对象:

客户类包含3种客户VIP客户,普通客户,快速客户

号码类(银行叫号机)异步随机生成以上各种类型的客户3种客户各自有不同的号码顺序

    

服务类有包含3种服务VIP服务,普通服务,快速服务

 

银行类开启各种服务窗口 启动号码类(生成各类客户)窗口按顺序叫号办理各种业务

 

客户类实现有3个客户采用枚举方式:

 

public enumCustomerType {

   GENERAL, VIP, RAPIDBUSINESS;

   public long spendTime;

   @Override

   public String toString() {

      switch (this) {

      case GENERAL:

         return "普通";

      case RAPIDBUSINESS:

         return "快速";

      case VIP:

         return "VIP";

      }

      return null;

   }

}

号码管理器(由号码机类来调用)编写:

public classNumberManager{

   private int lastNumber = 1;

   private List<Integer> queueNumber = new ArrayList<Integer>();

 

   public synchronized int generateNewManager() {

      queueNumber.add(lastNumber);

      return lastNumber++;

   }

 

   public synchronized Integer getServiceNumber() {

      if (!queueNumber.isEmpty()) {

         return queueNumber.remove(0);

      }

      return null;

   }

}

 

号码机类编写(一个银行只有一个号码机,采用单例设计模式)编写:

public classNumberMachine{

   private static NumberMachine instance=new NumberMachine();

   private NumberManager generalManager = new NumberManager();

   private NumberManager rapidManager = new NumberManager();

   private NumberManager vipManager = new NumberManager();

 

   public NumberManager getGeneralManager() {

      return generalManager;

   }

 

   public NumberManager getRapidBusinessManager() {

      return rapidManager;

   }

  

   public NumberManager getVipManager() {

      return vipManager;

   }

   private NumberMachine(){}

//构造函数私有别人不能new新的对象

   //采用静态函数取得本类实例

   public static NumberMachine getInstance(){

      return instance;

   }

}

 

建一个常量类存放数据:

public classConstants{

public staticintMAX_SERVICE_TIME=10000;//最大服务时间毫秒

public staticintMIN_SERVICE_TIME=1000;//最小服务时间毫秒

public staticintGENERAL_CUSTOMER_INTERVAL_TIME=1;//生成普通客户间隔秒

public staticintVIP_CUSTOMER_INTERVAL_TIME=6;//生成VIP客户间隔秒

public staticintRAPIDBUSINESS_CUSTOMER_INTERVAL_TIME=3;//生成快速业务客户间隔秒

}

银行窗口服务类编写:

 

import java.util.Random;

import java.util.concurrent.Executors;

public classServiceWindow{

   private CustomerType windowType=CustomerType.GENERAL;

   private CustomerType customerType=CustomerType.GENERAL;

   private int windowId;

 

   public voidsetWindowType(CustomerType windowType) {

      this.windowType = windowType;

   }

 

   public void setWindowId(int windowId) {

      this.windowId = windowId;

   }

 

   public void start() {

      Executors.newSingleThreadExecutor().execute(new Runnable() {

         @Override

         public void run() {

            while (true) {

                switch (windowType) {

                case GENERAL:

                   generalServer();

                   break;

                case RAPIDBUSINESS:

                   rapidBusinessServer();

                   break;

                case VIP:

                   vipServer();

                   break;

                }

            }

         }

         //普通客户服务函数

         public void generalServer() {

            String windowName = getWindowName();

            System.out.println(windowName + "正在获取服务");

            Integer number = NumberMachine.getInstance()

                   .getGeneralManager().getServiceNumber();

            customerType=CustomerType.GENERAL;

            if (number != null) {

                System.out.println(windowName + "正在为" + number

                      +"号普通客户服务...");

                // 服务时间

                spendTime(windowName,number,customerType);

            }else{

                System.out.println(windowName + "没有取到服务,休息1");

                try {

                   Thread.sleep(1000);

                }catch(InterruptedExceptione) {

                   System.out.println("出错了" + e);

                }

            }

         }

         //随机生成客户服务时间

         public void spendTime(String windowName, Integer number,CustomerType customerType) {

            long serviceTime = 0;

            long beginTime = System.currentTimeMillis();

            if (customerType ==CustomerType.RAPIDBUSINESS) {

                serviceTime= Constants.MIN_SERVICE_TIME;

            }else{

                int random = new Random()

                      .nextInt(Constants.MAX_SERVICE_TIME) + 1;

                serviceTime= (random < Constants.MIN_SERVICE_TIME? Constants.MIN_SERVICE_TIME

                      :random);

            }

            try {

                Thread.sleep(serviceTime);

            }catch(InterruptedExceptione) {

                System.out.println("出错了" + e);

 

            }

            long costTime = System.currentTimeMillis() - beginTime;

            System.out.println(windowName + "" + number +customerType+"号客户完成服务,耗时:"

                   +(costTime / 1000) + "秒。。。。。。。");

         }

         //快速业务客户服务函数

         public void rapidBusinessServer() {

            String windowName = getWindowName();

            Integer number = NumberMachine.getInstance()

                   .getRapidBusinessManager().getServiceNumber();

            customerType=CustomerType.RAPIDBUSINESS;

            if (number != null) {

                System.out.println(windowName + "正在为" + number

                      +"号快速业务客户服务...");

                spendTime(windowName,number,customerType);

            }else{

                System.out.println("没有快速业务客户,获取普通客户业务");

                generalServer();

            }

         }

         //VIP客户服务函数

         public void vipServer() {

            String windowName = getWindowName();

            Integer number = NumberMachine.getInstance().getVipManager()

                   .getServiceNumber();

            customerType=CustomerType.VIP;

            if (number != null) {

                System.out.println(windowName + "正在为" + number

                      +"vip客户服务...");

                spendTime(windowName,number,customerType);

 

            }else{

                System.out.println("没有vip客户,获取普通客户业务");

                generalServer();

            }

         }

         public String getWindowName() {

            String windowName = "" + windowId+ "" + windowType + "窗口";

            return windowName;

         }

      });

   }

}

 

银行类在main中调用各类编写如下:

import java.util.concurrent.Executors;

import java.util.concurrent.TimeUnit;

 

public classBanker {

 

   /**

    * @param args

    */

   public static void main(String[] args) {

      System.out.println("银行开始营业了!");

      //开启4个普通窗口

      for (int i = 1; i <= 4; i++){

         ServiceWindow generalWindow = new ServiceWindow();

         generalWindow.setWindowId(i);

         generalWindow.start();

      }

      //开启一个快速业务窗口

      ServiceWindow rapidBusinessWindow = new ServiceWindow();

      rapidBusinessWindow.setWindowType(CustomerType.RAPIDBUSINESS);

      rapidBusinessWindow.setWindowId(5);

      rapidBusinessWindow.start();

      //开启一个VIP窗口

      ServiceWindow vipWindow = new ServiceWindow();

      vipWindow.setWindowType(CustomerType.VIP);

      vipWindow.setWindowId(6);

      vipWindow.start();

      //随机生成普通客户线程

      Executors.newScheduledThreadPool(1).scheduleAtFixedRate(

            // command,

            new Runnable() {

                @Override

                public void run() {

                   Integer number = NumberMachine.getInstance()

                         .getGeneralManager().generateNewManager();

                   System.out.println(number + "号普通客户等待服务");

                }

            },0, Constants.GENERAL_CUSTOMER_INTERVAL_TIME,

            TimeUnit.SECONDS);

      //随机生成快速业务客户线程

      Executors.newScheduledThreadPool(1).scheduleAtFixedRate(

            // command,

            new Runnable() {

                @Override

                public void run() {

                   Integer number = NumberMachine.getInstance()

                         .getRapidBusinessManager().generateNewManager();

                   System.out.println(number + "号快速客户等待服务");

                }

            },0, Constants.RAPIDBUSINESS_CUSTOMER_INTERVAL_TIME,

            TimeUnit.SECONDS);

      //随机生成VIP客户线程

      Executors.newScheduledThreadPool(1).scheduleAtFixedRate(

            // command,

            new Runnable() {

                @Override

                public void run() {

                   Integer number = NumberMachine.getInstance()

                         .getVipManager().generateNewManager();

                   System.out.println(number + "vip客户等待服务");

                }

            },0, Constants.VIP_CUSTOMER_INTERVAL_TIME,

            TimeUnit.SECONDS);

   }

}

 运行结果部分截图如下:



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