一个cron 表达式是由6或者7个以空格分隔的字段组成。字段能够包含任何允许值,伴随着特殊字符不同组合。这些字段如下所示:
字段名称 |
是否一定需要 |
允许的值 |
允许的特殊字符串 |
Seconds |
YES |
0-59 |
, - * / |
Minutes |
YES |
0-59 |
, - * / |
Hours |
YES |
0-23 |
, - * / |
Day of month |
YES |
1-31 |
, - * ? / L W |
Month |
YES |
1-12 or JAN-DEC |
, - * / |
Day of week |
YES |
1-7 or SUN-SAT |
, - * ? / L # |
Year |
NO |
empty, 1970-2099 |
, - * / |
可见,一个简单的cron表达式可以如此* * * * ? *表达或者更复杂些,像这样
0/5 14,18,3-39,52 * ? JAN,MAR,SEPMON-FRI 2002-2010
特殊字符串说明
合法的字符串、月份的名字和星期的字母表示,这些都不是大小写敏感的。
下面有一个完全的例子
0 0 12 * * ? |
Fire at 12pm (noon) every day |
0 15 10 ? * * |
Fire at 10:15am every day |
0 15 10 * * ? |
Fire at 10:15am every day |
0 15 10 * * ? * |
Fire at 10:15am every day |
0 15 10 * * ? 2005 |
Fire at 10:15am every day during the year 2005 |
0 * 14 * * ? |
Fire every minute starting at 2pm and ending at 2:59pm, every day |
0 0/5 14 * * ? |
Fire every 5 minutes starting at 2pm and ending at 2:55pm, every day |
0 0/5 14,18 * * ? |
Fire every 5 minutes starting at 2pm and ending at 2:55pm, AND fire every 5 minutes starting at 6pm and ending at 6:55pm, every day |
0 0-5 14 * * ? |
Fire every minute starting at 2pm and ending at 2:05pm, every day |
0 10,44 14 ? 3 WED |
Fire at 2:10pm and at 2:44pm every Wednesday in the month of March. |
0 15 10 ? * MON-FRI |
Fire at 10:15am every Monday, Tuesday, Wednesday, Thursday and Friday |
0 15 10 15 * ? |
Fire at 10:15am on the 15th day of every month |
0 15 10 L * ? |
Fire at 10:15am on the last day of every month |
0 15 10 ? * 6L |
Fire at 10:15am on the last Friday of every month |
0 15 10 ? * 6L |
Fire at 10:15am on the last Friday of every month |
0 15 10 ? * 6L 2002-2005 |
Fire at 10:15am on every last friday of every month during the years 2002, 2003, 2004 and 2005 |
0 15 10 ? * 6#3 |
Fire at 10:15am on the third Friday of every month |
0 0 12 1/5 * ? |
Fire at 12pm (noon) every 5 days every month, starting on the first day of the month. |
0 11 11 11 11 ? |
Fire every November 11th at 11:11am. |
Quartz Cron 表达式,布布扣,bubuko.com
原文:http://blog.csdn.net/john_f_lau/article/details/21516399