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Quartz – Quartz 1 – CronTriggers Tutorial
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Format
A cron expression is a string comprised of 6 or 7 fields separated by white space. Fields can contain any of the allowed values, along with various combinations of the allowed special characters for that field. The fields are as follows:
Field Name Mandatory? Allowed Values Allowed Special Characters Seconds YES 0-59 , – * / Minutes YES 0-59 , – * / Hours YES 0-23 , – * / Day of month YES 1-31 , – * ? / L W C Month YES 1-12 or JAN-DEC , – * / Day of week YES 1-7 or SUN-SAT , – * ? / L C # Year NO empty, 1970-2099 , – * / So cron expressions can be as simple as this: * * * * ? *
or more complex, like this: 0 0/5 14,18,3-39,52 ? JAN,MAR,SEP MON-FRI 2002-2010
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