Cron Expressions - ashishranjandev/developer-wiki GitHub Wiki

In Spring Boot Scheduler

@Scheduled(cron = "0 1 1 * * ?")

This will execute at 1.01 and 13.01. It can be used when you need to run the job without a pattern multiple times a day. And the zone attribute is very useful, when you do deployments in remote servers. This was introduced with spring 4.

@Scheduled(cron = "0 1 1,13 * * ?", zone = "CST")

Cron expression is represented by six fields:

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

Examples:

* "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

(*) means match any

*/X means "every X"

? ("no specific value") - useful when you need to specify something in one of the two fields in which the character is allowed, but not the other. For example, if I want my trigger to fire on a particular day of the month (say, the 10th), but I don't care what day of the week that happens to be, I would put "10" in the day-of-month field and "?" in the day-of-week field.