Quartz is a job scheduling library that can be integrated into a wide variety of Java applications.

CronTrigger

QuartZ Cron表达式

在线编写 Cron 表达式

https://www.freeformatter.com/cron-expression-generator-quartz.html

参考资料

http://www.quartz-scheduler.org/
http://www.quartz-scheduler.org/documentation/

https://crontab.guru/#

CronHowto
https://help.ubuntu.com/community/CronHowto

Cron Trigger Tutorial
http://www.quartz-scheduler.org/documentation/quartz-2.x/tutorials/crontrigger.html

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