Quartz cron-expression Demo

1. Start every day 0:5 and start every 15 minutes, 23:50 stop:

0 5/15 0-23 * * *
The cron expression, since 5, is executed every 15 minutes, and the last execution time at 23 is exactly 23:50. That means we're going to start at 23:50.
2. 8:00~20:00, triggered every two hours:
0 0 8-20/2 * * *?

Cron expressions, which start at 8 o'clock, are triggered every 2 hours. That is, 8,10,12,14,16,18,20.

3.8:00~20:00, triggered once every half hour:

0 0/30 8-20 * * *?

Cron expression, which starts 8 o'clock and fires once every half hour.

Quartz cron-expression Demo