Spring 调度 - 每天午夜的 Cron 表达式不起作用？
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Spring Scheduling - Cron expression for everyday at midnight not working?
提问by Charlie
I am trying to schedule a task in Spring which is to be run everyday at midnight. I followed the official guidefrom Spring and made the scheduler class as below:
我正在尝试在 Spring 中安排一项任务，该任务将在每天午夜运行。我按照Spring的官方指南制作了调度程序类，如下所示：
@Component
public class OverduePaymentScheduler {
@Scheduled(cron = "0 0 0 * * *")
public void trackOverduePayments() {
System.out.println("Scheduled task running");
}
}
However the task does not run when the clock hits 12am. I got the cron expression from the documentation for quartz scheduler at this link.
但是，当时钟到达凌晨 12 点时，任务不会运行。我从这个链接的石英调度程序文档中获得了 cron 表达式。
The scheduler is executed fine if I change the cron expression to "*/10 * * * * *" which runs every ten seconds.
如果我将 cron 表达式更改为每十秒运行一次的“*/10 * * * * *”，则调度程序执行得很好。
So what am I doing wrong?
那么我做错了什么？
回答by Rzv Razvan
These are valid formats for cron expressions:
这些是 cron 表达式的有效格式：
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 6,19 * * *= 6:00 AM and 7:00 PM every day.0 0/30 8-10 * * *= 8:00, 8:30, 9:00, 9:30, 10:00 and 10:30 every day.0 0 9-17 * * MON-FRI= on the hour nine-to-five weekdays0 0 0 25 12 ?= every Christmas Day at midnight
0 0 * * * *= 每天的每个小时的顶部。*/10 * * * * *= 每十秒。0 0 8-10 * * *= 每天的 8、9 和 10 点。0 0 6,19 * * *= 每天早上 6:00 和晚上 7:00。0 0/30 8-10 * * *= 每天 8:00、8:30、9:00、9:30、10:00 和 10:30。0 0 9-17 * * MON-FRI= 工作日的朝九晚五0 0 0 25 12 ?= 每个圣诞节的午夜
The pattern is:
图案是：
second, minute, hour, day, month, weekday
So your answer is:
所以你的答案是：
0 0 0 * * *
回答by Charlie
I finally got it to work with this cron expression 0 0 0 * * *but I had to set the time zone in the scheduler class like this.
@Scheduled(cron = "0 0 0 * * *",zone = "Indian/Maldives")
我终于让它与这个 cron 表达式一起工作，0 0 0 * * *但我必须像这样在调度程序类中设置时区。
@Scheduled(cron = "0 0 0 * * *",zone = "Indian/Maldives")
回答by Ajit Soman
Please use below cron pattern for 12:00 AM every day:
请在每天上午 12:00 使用以下 cron 模式：
// at 12:00 AM every day
@Scheduled(cron="0 0 0 * * ?")
I have checked your cron pattern at this website:http://www.cronmaker.com/.
我已经在这个网站上检查了你的 cron 模式：http: //www.cronmaker.com/。
It says pattern 0 0 0 * * *as invalid.
它说模式0 0 0 * * *无效。
