https://docs.oracle.com/cd/E12058_01/doc/doc.1014/e12030/cron_expressions.htm
Cron Expressions
A Cron Expressions Cron expressions are used to configure instances of CronTrigger, a subclass of org.quartz.Trigger. A cron expression is a string consisting of six or seven subexpressions (fields) that describe individual details of the schedule. These f
docs.oracle.com
댓글