import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;
/**
 * 實(shí)現(xiàn)Delayed接口，用于插入延遲阻塞隊(duì)列
 * @author SN
 *
 */
public class Worker implements Delayed{
	private String name;
	private String workNo;
	private long startTime;
	private long endTime;
	public static final TimeUnit TIME_UNIT=TimeUnit.SECONDS;
	public Worker(String name,String workNo,long startTime,long endTime){
		this.name=name;
		this.workNo=workNo;
		this.startTime=startTime;
		this.endTime=endTime;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getWorkNo() {
		return workNo;
	}
	public void setWorkNo(String workNo) {
		this.workNo = workNo;
	}
	public long getStartTime() {
		return startTime;
	}
	public void setStartTime(long startTime) {
		this.startTime = startTime;
	}
	public long getEndTime() {
		return endTime;
	}
	public void setEndTime(long endTime) {
		this.endTime = endTime;
	}
	//排序方法，用于將插入隊(duì)列的對象按延遲時間進(jìn)行排序
	@Override
	public int compareTo(Delayed delayed) {
		Worker worker=(Worker) delayed;
		return (this.getDelay(TIME_UNIT)-worker.getDelay(TIME_UNIT))>0?1:0;
	}
	//延遲時間，用于確定取出隊(duì)列中數(shù)據(jù)的時間
	@Override
	public long getDelay(TimeUnit unit) {
		return endTime-System.currentTimeMillis();
	}
}

import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.concurrent.DelayQueue;
/**
 * 向延遲隊(duì)列中插入數(shù)據(jù)，并在到達(dá)延遲時間時從隊(duì)列中取出數(shù)據(jù)，否則就阻塞當(dāng)前線程
 * @author SN
 *
 */
public class DelayQueueExp implements Runnable{
	private DelayQueue<Worker> queue=new DelayQueue<>();
	public boolean working=true;
	public static final SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	//向延遲隊(duì)列中插入數(shù)據(jù)，并設(shè)置延遲取出的時間
	public void startWork(String name,String workNo,int grade){
		long time=System.currentTimeMillis();
		Date date=new Date(time);
		Worker worker=new Worker(name, workNo, System.currentTimeMillis(), grade*10000+time);
		System.out.println("員工"+worker.getName()+",工號"+worker.getWorkNo()+"于"+sdf.format(date)+"打卡上班...");
		this.queue.add(worker);
	}
	public void endWork(Worker worker){
		Date date=new Date(worker.getEndTime());
		System.out.println("員工"+worker.getName()+",工號"+worker.getWorkNo()+"于"+sdf.format(date)+"打卡下班...");
	}
	@Override
	public void run() {
		while (working) {
			try {
				//啟動線程后，從延遲隊(duì)列中取出數(shù)據(jù)，如果沒有滿足延遲時間條件的數(shù)據(jù)可以取出就阻塞住線程
				Worker worker=queue.take();
				endWork(worker);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	public static void main(String[] args) {
		System.out.println("員工開始打卡上班...");
		DelayQueueExp company=new DelayQueueExp();
		Thread work=new Thread(company);
		work.start();
		//向延遲隊(duì)列中插入數(shù)據(jù)
		company.startWork("zhangsan", "1001", 1);
		company.startWork("lisi", "1002", 3);
		company.startWork("wanger", "1003", 5);
	}
}