黑马程序员_java_基础加强_模拟银行管理系统
------- android培训、java培训、期待与您交流！ ----------
package com.itheima.bank;
/*常量类
定义常量*/
public class Constants {
public static int MAX_SERVICE_TIME=10000;
//最多服务时间10秒
public static int MIN_SERVICE_TIME=1000;
//最少服务时间1秒
public static int COMMON_CUSTOMER_INTERVAL_TIME =1;
}
package com.itheima.bank;
import java.util.ArrayList;
import java.util.List;
/*号码管理类
实现客户取号，排队*/
public class NumberManager {
private int lastNumber = 1;
private List
public synchronized Integer generateNumber()
{
queueNumber.add(lastNumber);
return lastNumber++;
}
public synchronized Integer fetchServiceNumber()
{
Integer number =null;
if(queueNumber.size()>0)
{
number = queueNumber.remove(0);
}
return number;
}
}
package com.itheima.bank;
/*号码管理机器
单例模式，意思是一台号码机*/
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;
}
private NumberMachine(){}
public static NumberMachine getInstance()
{
return instance;
}
private static NumberMachine instance = new NumberMachine();
}
package com.itheima.bank;
import java.util.Random;
import java.util.concurrent.Executors;
/*服务窗口类
对产生的号码处理*/
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.newScheduledThreadPool(1).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+"正在获取任务");
Integer number = NumberMachine.getInstance().getCommonManager().fetchServiceNumber();
if(number != null)
{
long beginTime = System.currentTimeMillis();
int maxRand = Constants.MAX_SERVICE_TIME - Constants.MIN_SERVICE_TIME;
long serverTime = new Random().nextInt(maxRand)+1+Constants.MIN_SERVICE_TIME;
try {
Thread.sleep(serverTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
long castTime = System.currentTimeMillis()-beginTime;
System.out.println(windowName+"为第"+number+"个"+"普通"+"客户完成服务，耗时"+(castTime)/1000+"秒");
}else
{
System.out.println(windowName+"没有取到任务,先休息1秒钟");
}
}
private void expressService() {
String windowName = "第" +windowID+"号"+type+"窗口";
Integer number = NumberMachine.getInstance().getExpressManager().fetchServiceNumber();
System.out.println(windowName+"正在获取任务");
if(number != null)
{
long beginTime = System.currentTimeMillis();
//int maxRand = Constants.MAX_SERVICE_TIME - Constants.MIN_SERVICE_TIME;
//long serverTime = new Random().nextInt(maxRand)+1+Constants.MIN_SERVICE_TIME;
try {
Thread.sleep(Constants.MIN_SERVICE_TIME);
} catch (InterruptedException e) {
e.printStackTrace();
}
long castTime = System.currentTimeMillis()-beginTime;
System.out.println(windowName+"为第"+number+"个"+type+"客户完成服务，耗时"+(castTime)/1000+"秒");
}else
{
System.out.println(windowName+"没有取到任务!");
commonService();
}
}
private void vipService() {
String windowName = "第" +windowID+"号"+type+"窗口";
Integer number = NumberMachine.getInstance().getVipManager().fetchServiceNumber();
System.out.println(windowName+"正在获取任务");
if(number != null)
{
long beginTime = System.currentTimeMillis();
int maxRand = Constants.MAX_SERVICE_TIME - Constants.MIN_SERVICE_TIME;
long serverTime = new Random().nextInt(maxRand)+1+Constants.MIN_SERVICE_TIME;
try {
Thread.sleep(serverTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
long castTime = System.currentTimeMillis()-beginTime;
System.out.println(windowName+"为第"+number+"个"+type+"客户完成服务，耗时"+(castTime)/1000+"秒");
}else
{
System.out.println(windowName+"没有取到任务!");
commonService();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
package com.itheima.bank;
/*采用枚举
列举三种客户，普通，快速，VIP*/
public enum CustomerType {
COMMON,EXPRESS,VIP;
public String toString()
{
String name = null;
switch(this)
{
case COMMON:
return "普通";
case EXPRESS:
return "快速";
case VIP :
return name();
}
return name;
}
}
package com.itheima.bank;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/*主方法类
执行代码*/
public class MainClass {
public static void main(String args [])
{
for(int i =1;i< 5;i++)
{
//产生四个普通服务窗口
ServiceWindow commonWindow =new ServiceWindow();
commonWindow.setWindowID(i);
commonWindow.start();
}
//产生一个快速服务窗口
ServiceWindow expressWindow =new ServiceWindow();
expressWindow.setType(CustomerType.EXPRESS);
expressWindow.start();
//产生一个VIP服务窗口
ServiceWindow vipWindow =new ServiceWindow();
vipWindow.setType(CustomerType.VIP);
vipWindow.start();
//普通客户取号
Executors.newScheduledThreadPool(1).scheduleAtFixedRate(
new Runnable(){
public void run()
{
Integer number = NumberMachine.getInstance().getCommonManager().generateNumber();
System.out.println(number+"号普通客户等待服务");
}
},
0,
Constants.COMMON_CUSTOMER_INTERVAL_TIME,
TimeUnit.SECONDS);
//快速客户取号
Executors.newScheduledThreadPool(1).scheduleAtFixedRate(
new Runnable(){
public void run()
{
Integer number = NumberMachine.getInstance().getExpressManager().generateNumber();
System.out.println(number+"号快速客户等待服务");
}
},
0,
Constants.COMMON_CUSTOMER_INTERVAL_TIME*2,
TimeUnit.SECONDS);
//VIP客户取号
Executors.newScheduledThreadPool(1).scheduleAtFixedRate(
new Runnable(){
public void run()
{
Integer number = NumberMachine.getInstance().getVipManager().generateNumber();
System.out.println(number+"号VIP客户等待服务");
}
},
0,
Constants.COMMON_CUSTOMER_INTERVAL_TIME*6,
TimeUnit.SECONDS);
}
}