计划任务在给定时间每3天运行一次

Question

I am using Quartz 2 scheduler for scheduling tasks. Below is what I need.

1. schedule the job when the user click on a button.
2. The job should be scheduled to run at 8 AM, every 3 days.

Below is how I coded it. It will execute (with its scheduler of course) once the user click on a button in web app)

Trigger passportTrigger1 = newTrigger()
                 .withIdentity(passportTriggerKey1)
                 .withSchedule(simpleSchedule().withIntervalInHours(3*24).repeatForever()) 
                 .startAt(todayAt(8,0,0)).build();

However you can see that I have used startAt(todayAt(8,0,0)) . What happens if the user turned on the scheduler after 8.00 AM today? The job will be scheduled immediately or it will never get scheduled?

Answer 1

您还可以检查当前时间：如果是在上午8点之前startAt(todayAt(8, 0, 0) startAt(tomorrowAt(8, 0, 0)) startAt(todayAt(8, 0, 0)否则startAt(tomorrowAt(8, 0, 0)) 。