Cron expression (seven subexpressions)

One 、 Seven sub meanings

	second	branch	when	Japan	month	Zhou	year
Available values	0~59	0~59	0~23	1~31	1~12(JAN-DEC)	1~7(SUN-SAT)	1970~2099
Available wildcards	, - * /	, - * /	, - * /	, - * / ? L W	, - * /	, - * / ? L #	, - * /
If required	yes	yes	yes	yes	yes	yes	no

Two 、 Description of available values

second （Seconds）： Available numbers "0~59" Express .

branch （Minutes）： Available numbers "0~59" Express .

when （Hours）： Available numbers "0~23" Express .

Japan （Day-of-Month）： Available numbers "1~31" Express , But pay attention to the number of days in a specific month .

month （Month）： Available numbers "1~12" Or abbreviations "JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC" Express .

Zhou （Day-of-Week）： Available numbers "1~7" Or abbreviations "SUN,MON,TUE,WED,THU,FRI,SAT" Express （ Pay attention when using numbers "1" Means Sunday ）.

year （Year）： Available numbers "1970~2099" Express , This item is not required .

3、 ... and 、 Wildcards can be used to describe

wildcard	Applicable domain	meaning	example
*	all	All values	Set at the point "*", It means that it will trigger every minute .
?	Day and week （ Day and week cannot be both "?"）	You don't need to care about the value of the current position , A day of the month , Or one day of the week	“0 0 0 1 * ?“ Means every month 1 No. triggers , But it doesn't matter what day of the week , So the position of the week is set to ”?”; “0 0 0 ? * 2" Indicates that it is triggered every Monday , But I don't care about the number , So the position of the day is set to ”?".
-	all	Indicates the interval	Set at the time position "10-12", Express "10 spot 、11 spot 、12 spot " Trigger .
,	all	Indicates that multiple values are specified	Set at the position of the week "MON,WED,FRI", Express " Monday 、 Wednesday 、 Friday " Trigger .
/	all	For incremental trigger	Set at the position of seconds "5/15", From 5 Seconds to start , every other 15 Second trigger once (5,20,35,50). Set on the position of the month "1/7", Means every month 1 The start , every other 7 Once a day .
L(Last)	Day and week	Indicates the last day of each month or week ; XL Indicates the last week of each month X	"0 0 0 L * ?" Indicates that the last day of each month triggers ; "0 0 0 ? * L" It means that the last Saturday of each month triggers ; "0 0 0 ? * 2L" Indicates that the last Monday of each month triggers .
W(Work)	Japan	Indicates the working day closest to the specified date （ Monday to Friday , Ignore holidays ）（"W" The number before indicates the number ）	Set on the position of the day "15W", It means to leave 15 The latest working day of No. is triggered （ if 15 It's Saturday , be 14 No. triggers ; if 15 It's Sunday , be 16 No. triggers ; if 15 No. is a working day , Then trigger on the same day ）; Set on the position of the day "1W", In the current month 1 The most recent working day after the .（ if 1 It's Saturday , be 3 No. triggers ）; “L" and "W" Can be used in combination . If you set... On the day field "LW”, It means triggered on the last working day of this month .
#	Zhou	N#M Represents the... Of every month M Week N	"0 0 0 ? 5 1#2" It means mother's day （ Every year, 5 The second Sunday of the month ）; "0 0 0 ? 6 1#3" It means father's day （ Every year, 6 The third Sunday of the month ）.

attach ： On-line Cron Expression generator (pppet.net)