定时任务调度之Timer---综合使用小案例

梦里梦外; 2022-06-06 05:15 179阅读 0赞

**\#需求介绍:**

在定时任务调度中,添加跳舞机器人和灌水机器人,两个人在任务调度中,各干各的事情,在灌水机器人灌满5L水后,灌水机器人结束工作任务,跳舞机器人休眠2秒结束任务.

**\#代码:**

package com.haige.robot;
    
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.TimerTask;
    
    public class DancingRobot extends TimerTask {
    
    	@Override
    	public void run() {
    		// TODO Auto-generated method stub
           //获得最近一次的执行时间,并将其格式化
    	   Calendar calendar = Calendar.getInstance();
    	   SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    	   System.out.println("任务执行的时间是: " + sf.format(scheduledExecutionTime()));
    	   System.out.println("开始跳舞!");
    	}
    
    }

package com.haige.robot;
    
    import java.util.Timer;
    import java.util.TimerTask;
    
    public class WaterRobot extends TimerTask {
    	private Timer timer;
    	public WaterRobot(Timer InputTimer) {
    		super();
    		timer = InputTimer;
    	}
    
    	//最大容量为5L
        private Integer bucketCapacity = 0;
        
    	@Override
    	public void run() {
    		// TODO Auto-generated method stub
           //灌水直至桶满为止
    	   if(bucketCapacity<5){
    		  System.out.println("添加1L水到容器中!");
    		  bucketCapacity ++;
    	   }else{
    		   //水满之后就停止执行
    		   System.out.println("已取消的任务数为 :" + timer.purge());
    		   cancel();
    		   System.out.println("灌水机器人已经停止执行!");
    		   System.out.println("已取消的任务数为 :" + timer.purge());
    		   System.out.println("注水完成,水容量为 : " + bucketCapacity + "L");
    		   //等待两秒钟,终止timer里面的所有内容
    		   try {
    			Thread.sleep(2000);
    		} catch (InterruptedException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		   timer.cancel();         //取消timer实例下所有线程的执行
    	   }
    	}
    
    }

package com.haige.robot;
    
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Timer;
    
    public class Executor {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
           Timer timer = new Timer();
           //获取系统当前时间
    	   Calendar calendar = Calendar.getInstance();
    	   SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    	   System.out.println("系统时间是: " + sf.format(calendar.getTime()));
    	   
    	   DancingRobot danceRt = new DancingRobot();
    	   WaterRobot waterRt = new WaterRobot(timer);    //dance等待water停止两秒之后也停止执行
    	   
    	   timer.schedule(danceRt, calendar.getTime(), 2000);
    	   timer.schedule(waterRt, calendar.getTime(), 3000);
    	}
    
    }

**\#截图:**

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[Center]: /images/20220606/9d62c8e2d9cf4b83881f97db7f19a4c7.png