Cron Expressions
Cron expressions are used to configure instances of CronTrigger, a subclass of org.quartz.Trigger. A cron expressions is a string consisting of six or seven subexpressions (fields) that describe individual details of the schedule. These fields, separated by white space, can contain any of the allowed values with various combinations of the allowed characters for that field. Table 1 Cron Expression Allowed Fields and Values Name Required Allowed Values Allowed Special Charaters Seconds Y 0-59 ,-*/ Minutes Y 0-59 ,-*/ Hours Y 0-23 ,-*/ Day of month Y 1-31 ,-*?/LWC Month Y 0-11 or JAN-DEC ,-*/ Day of week Y 1-7 or SUN-SAT ,-*?/LC# Year N Empty or 1970-2099 ,-*/ Example Cron expression can be as simple as * * * * ? * or as complex as 0 0/5 14,18,3-39,52 ? JAN,MAR,SEP MON-FRI 2002-2010 ...