@scheduled Annotations of Spring timed tasks (cron expressions)

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A cron expression has at least 6 (or possibly 7) time elements that have a space separation. In order of
1 seconds (0~59)
2 minutes (0~59)
3 hours (0~23)
4 Days (0~31)
May (0~11)
6 weeks (1~7 1=sun or Sun,mon,tue,wed,thu,fri,sat)
7. Year (1970-2099)
Each of these elements can be a value (such as 6), a continuous interval (9-12), a time interval (8-18/4) (/= every 4 hours),
A list (1,3,5), a wildcard character. Because the "date in the month" and "date in the week" are mutually exclusive, one of the two elements must be set.
0 0 10,14,16 * *? 10 o'clock in the morning, 2 o'clock in the afternoon, 4 O ' Day
0 0/30 9-17 * *? Every half hour for nine to five working hours
0 0 12? * WED means every Wednesday noon 12 o'clock
"0 0 12 * *?" trigger 12 o'clock noon every day.
"0 15 10?" * * "trigger 10:15 every day"
"0 15 10 * *?" Daily 10:15 Trigger
"0 15 10 * *?" * "10:15 per day" trigger
"0 15 10 * *?" 2005 "2005-year daily 10:15 Trigger
"0 * 14 * *?" triggers every 1 minutes from 2 o'clock in the afternoon to 2:59 daily
"0 0/5 14 * *?" triggers every 5 minutes from 2 o'clock in the afternoon to 2:55 daily
"0 0/5 14,18 * *?" triggers every 5 minutes from 2 o'clock in the afternoon to 2:55 daily and from 6 o'clock in the afternoon to 6:55
"0 0-5 14 * *?" triggers every 1 minutes from 2 o'clock in the afternoon to 2:05 daily
"0 10,44 14?" 3 WED "2:10 and 2:44 triggers in Wednesday of every March
"0 15 10?" * Mon-fri "Monday to Friday 10:15 trigger
"0 15 10 15 *?" 15th 10:15 per month
"0 L *?" 10:15 on the last day of the month
"0 15 10?" * 6L "Last month of Friday 10:15 Trigger
"0 15 10?" * 6L 2002-2005 "2002 to 2005 the last of the monthly Friday 10:15 trigger
"0 15 10?" * 6#3 "Monthly third Friday 10:15 trigger
Some sub-expressions can contain ranges or lists
For example: subexpression (Day (week)) can be "Mon-fri", "Mon,wed,fri", "Mon-wed,sat"
The "*" character represents all possible values
The "/" character is used to specify the increment of the numeric value
For example: "0/15" in sub-expressions (minutes) means starting from the No. 0 minute, every 15 minutes
"3/20" in the sub-expression (minutes) means that every 20 minutes (it is the same as "3,23,43") starting from the 3rd minute
“。 "Character is used only for days (months) and days (weeks) of two sub-expressions, indicating that no value is specified
To avoid a conflict, you need to set the value of another subexpression to "when one of the 2 sub-expressions is assigned a value. ”
The "L" character is used only for days (months) and days (weeks) of two sub-expressions, which is the abbreviation for the word "last"
If there is specific content before "L", it has other meanings. For example: "6L" means the 6th day of the month.
Note: When using the "L" parameter, do not specify a list or range, as this can cause problems
The W character represents weekdays (MON-FRI) and can only be used in the day domain. It is used to specify the most recent weekday from the specified day.
Most of the business process is based on the work week, so the W character may be very important.
For example, 15W in the daily field means "the most recent weekday of the month 15th." "If number 15th is Saturday,
Then trigger will trigger on number 14th (Friday), since Thursday is closer to 15th than in Monday.
C: means "Calendar". It means the date that the schedule is associated with, and if the date is not associated,
is equivalent to all dates in the calendar. For example 5C in a Date field is equivalent to the first day of the calendar after 5th.
1C is equivalent to the first day of Sunday after the week field.
Special characters allowed for field allowed values
Seconds 0-59,-*/
Sub 0-59,-*/
Hours 0-23,-*/
Date 1-31,-*? /L W C
Month 1-12 or JAN-DEC,-*/
Week 1-7 or Sun-sat,-*? /L C #

Year (optional) leave blank, 1970-2099,-*/

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