The http://tangshuo.iteye.com/blog/184824 expression has a minimum of six bits, such as starting one o'clock in the morning every day:"0 0 1 * *?"ORDER BY
seconds Date Month weekday year (optional)Allowed special characters for the allowable value of the typesetting segment
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,-*/
Meaning of an expression
"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
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Seconds (0~59)
Minutes (0~59)
Hours (0~23)
Days (months) (0~31, but you need to consider the number of days of your month)
Month (0~11)
Days (weeks) (1~7 1=sun or Sun,mon,tue,wed,thu,fri,sat)
A complete example
"0 0 12?" * WED "means every Wednesday noon 12 o'clock
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
Therefore, "*" in the sub-expression (month) represents the meaning of each month, "*" in the subexpression (Day (week)) represents every day of the week
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
When one of the 2 sub-expressions is assigned a value, in order to avoid a conflict, you need to set the value of another subexpression to "? ”
The "L" character is used only for days (months) and days (weeks) of two sub-expressions, which is the abbreviation for the word "last"
But it has a different meaning in two sub-expressions.
In the day (month) subexpression, "L" represents the last day of the one-month
In the day (week) Self-expression, "L" represents the last day of one weeks, the SAT
If there is something specific before "L", it has other meanings.
For example: "6L" means the 6th day of the month, and "Fril" means the last Friday of the month.
Note: When using the "L" parameter, do not specify a list or range, as this can cause problems
Quartz cron expression (Spring timer crontab)
