springboot定时任务fixedDelay与fixedRate对比与代码实战

九转成圣

发布于 2024-04-10 18:24:27

1210

发布于 2024-04-10 18:24:27

文章被收录于专栏：csdncsdn

fixedDelay与fixedRate对比

fixedDelay

@Scheduled(fixedDelay = 3000)
public void task2() throws InterruptedException {
    String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
    log.info("task2 " + date);
    Thread.sleep(6000);
}

2024-04-06 17:02:40.692  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:02:40
2024-04-06 17:02:49.693  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:02:49
2024-04-06 17:02:58.695  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:02:58
2024-04-06 17:03:07.696  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:03:07
2024-04-06 17:03:16.698  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:03:16
2024-04-06 17:03:25.701  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:03:25
2024-04-06 17:03:34.702  INFO 151080 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task2 2024-04-06 17:03:34

可以看出@Scheduled(fixedDelay = 3000)表示执行完第一次后延迟3000毫秒再次执行

fixedRate

@SneakyThrows
@Scheduled(fixedRate = 3000)
public void task4() {
    String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
    log.info("task4 " + date);
    Thread.sleep(6000);
}

2024-04-06 17:06:14.597  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:14
2024-04-06 17:06:20.598  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:20
2024-04-06 17:06:26.599  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:26
2024-04-06 17:06:32.600  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:32
2024-04-06 17:06:38.600  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:38
2024-04-06 17:06:44.617  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:44
2024-04-06 17:06:50.617  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:50
2024-04-06 17:06:56.618  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:06:56
2024-04-06 17:07:02.618  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:07:02
2024-04-06 17:07:08.618  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:07:08
2024-04-06 17:07:14.619  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:07:14
2024-04-06 17:07:20.619  INFO 35892 --- [   scheduling-1] com.lxw.station.task.HelloTask           : task4 2024-04-06 17:07:20

fixedRate = 3000表示第一次执行开始后3000毫秒再次执行,如果3000毫秒没有执行完成,执行完成后立即执行第二次,从日子可以看出首次执行开始时间2024-04-06 17:06:14,执行耗时6000毫秒,执行结束时间也就是2024-04-06 17:06:20,接着立即执行第二次

本文参与?腾讯云自媒体分享计划，分享自作者个人站点/博客。

原始发表：2024-04-10，如有侵权请联系 cloudcommunity@tencent.com 删除

task