用ScheduledExecutorService实现任务调度

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最新推荐文章于 2025-06-27 02:46:41 发布

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本文介绍如何使用 Java 中的 ScheduledExecutorService 实现定时循环执行任务。通过具体实例展示了如何设置任务在指定日期时间开始并周期性执行，适用于需要进行定时任务调度的应用场景。

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ScheduledExecutorService实现任务调度，定时循环执行

代码如下：

package com.shentong.limitcsv;

import java.util.Calendar;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ExecutorTest {
	private static final long DAY_TIMES = 5*60*1000;

	public static void scheduleAtFixedRate(Runnable runnable, int day, int hour, int min) throws Exception {
		ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
		long curLong = System.currentTimeMillis();
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(curLong);
		calendar.add(Calendar.DAY_OF_MONTH, day);
		calendar.set(Calendar.HOUR_OF_DAY, hour);
		calendar.set(Calendar.MINUTE, min);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		long delay=calendar.getTimeInMillis() - curLong;
		executor.scheduleAtFixedRate(runnable, delay, DAY_TIMES,
				TimeUnit.MILLISECONDS);
	}
	static Logger logger = LoggerFactory.getLogger(ExecutorTest.class);
	public static void main(String[] args) {		
		Exec manage = new Exec();
		try {
			scheduleAtFixedRate(manage, 0, 17, 0);
		} catch (Exception e) {
			e.printStackTrace();
		}				
	}
}
class Exec implements Runnable{
	Logger logger = LoggerFactory.getLogger(Exec.class);
	static int cnt = 1;
	boolean taskstatus = false;
	@Override
	public void run() {
		logger.debug("执行了"+(cnt++)+"次");
		taskstatus = true;
		
	}
	public boolean isTaskstatus() {
		return taskstatus;
	}
	
}