Cron更改后，Sprng Boot @Scheduled任务停止工作

Question

Spring Boot在这里。 我有一个计划的后台任务，我每小时在这个小时开始：

@Component
public class TokenReaper {
    @Scheduled(cron = "0 0 * * * *")
    public void fire() {
        // Doesn't matter what it does...
    }
}

我实际上需要它现在每天仅在上午8:26运行，因此当时每天仅运行一次（奇怪，我知道！），因此我将cron表达式更改为：

@Component
public class TokenReaper {
    @Scheduled(cron = "0 26 8 * * *")
    public void fire() {
        // Doesn't matter what it does...
    }
}

进行此更改后，该任务在上午8:26停止运行，由于日志的原因，我无法确定该任务何时实际运行或根本不运行！ 任何人都可以看到，如果我的新的cron表达式是某种格式不正确或不正确设置为每天早上每个上午8:26和运行？

Answer 1

您需要添加? 在您的cron表达式中：

将@Scheduled(cron = "0 26 8 * * *")更改为：

@Scheduled(cron = "0 26 8 * * ?")

Answer 2

尝试这个

@Scheduled(cron = "0 26 8 * * ?")

Cron表达式由六个字段表示：

second, minute, hour, day of month, month, day(s) of week

模式范例

* "0 0 * * * *" = the top of every hour of every day.
* "*/10 * * * * *" = every ten seconds.
* "0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.
* "0 0 8,10 * * *" = 8 and 10 o'clock of every day.
* "0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30 and 10 o'clock every day.
* "0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays
* "0 0 0 25 12 ?" = every Christmas Day at midnight