List of few important cron expressions we can use with @Scheduled annotation.
Cron expression is made up of six characters
First ==> second :) interesting ;) its unit and not the position second
Second ==> minute
Third ==> hour
Fourth ==> date
Fifth ==> month
Sixth ==> year? hmm...no its for day of week. :)
Following are some handy expressions you may want to use for your scheduled jobs.
* * * * * * ==> Every second any Minute, any Hour, any Hour, any Date, any Month, any Day
0 * * * * * ==> When second is zero (i.e. Every minute) any Hour, any Date, any Month, any Day
*/5 * * * * * ==> Every five seconds any Hour, any Date, any Month, any Day (i.e. 00:00:00, 00:00:05, 00:00:10 .... 23:59:55)
0-1 * * * * * ==> Every zeroth and first second of minute any Hour, any Date, any Month, any Day (i.e. 00:00:00, 00:00:01, 00:01:00, 00:01:01 .... 23:59:00, 23:59:01)
5,10,15 * * * * * ==> Every fifth, tenth and fifteenth seconds of minute any Hour, any Date, any Month, any Day (i.e. 00:00:05, 00:00:10, 00:00:15, 00:01:05 .... 23:59:05, 23:59:10, 23:59:15)
5,10,15 * * * * THU ==> Every fifth, tenth and fifteenth seconds of minute of every Thursday any Hour, any Date, any Month (i.e. 00:00:05, 00:00:10, 00:00:15, 00:01:05 .... 23:59:05, 23:59:10, 23:59:15)
5,10,15 * * * * MON,TUE,THU ==> Every fifth, tenth and fifteenth seconds of minute of every Monday, Tuesday and Thursday any Hour, any Date, any Month (i.e. 00:00:05, 00:00:10, 00:00:15, 00:01:05 .... 23:59:05, 23:59:10, 23:59:15)
5,10,15 * * * * MON-FRI ==> Every fifth, tenth and fifteenth seconds of minute of every Monday to Friday any Hour, any Date, any Month (i.e. 00:00:05, 00:00:10, 00:00:15, 00:01:05 .... 23:59:05, 23:59:10, 23:59:15)
* 40 22 * * * ==> Every second at 22:40 (i.e. 10:40 PM) any Hour, any Date, any Month, any Day
0 40 22 * * * ==> Only once at 22:40:00 any Day, any Month, any Day
0 30 * * * * ==> Only once at half past of each hour any Hour, any Date, any Month, any Day (i.e. at 00:30, 01:30 .... 23:30)
0 */10 * * * * ==> Once once at every ten minutes any Hour, any Date, any Month, any Day
0 */10 0 * * * ==> Once once at every ten minutes, zeroth Hour, any Date, any Month, any Day
0 0 1 * * * ==> When month changes (welcome salary)
0 */10 0 1 * * ==> Once once at every ten minutes, zeroth Hour, first of each month, any Month, any Day
Now some fun items...
0 0 0 15 8 * ==> Every year on 15th August midnight (to welcome independence day)
0 0 0 25 12 * ==> Welcome christmas
0 0 0 1 1 * ==> Happy new year
0 30 6 * * MON-FRI ==> Wake up on working days
0 30,35 6 * * MON-FRI ==> Wake up on working days with 5 minute snooze.
0 0 6 * * SAT,SUN ==> Weekend of traveller
0 30 7 * * SAT, SUN ==> Normal weekends
0 30 6 * * MON-FRI ==> Wake up on working days
0 30,35 6 * * MON-FRI ==> Wake up on working days with 5 minute snooze.
0 0 6 * * SAT,SUN ==> Weekend of traveller
0 30 7 * * SAT, SUN ==> Normal weekends
