Q1: Why does Spring not support the 7nd paramter of regular cron expression which is used to specify which year? I know it doesn't support, but why?
Q2: If a scheduled task should be executed at 2024-01-01T10:00:00, how do I do to make it only be exuected in 2024 but not exeucted in 2023 or 2025?
Thanks a lot!
CodePudding user response：
Q1: Including the year as a parameter in a cron expression would add unnecessary complexity to the expression without providing much additional functionality. Most tasks that are scheduled using cron expressions are intended to be run periodically, such as daily, weekly, or monthly. In these cases, it is not necessary to specify the year because the task will be run every year.
Additionally, including the year as a parameter would limit the flexibility of cron expressions. For example, if a task needed to be run every other year, this would not be possible using a cron expression with a year parameter.
Overall, the decision not to include the year as a parameter in Spring's cron expressions was likely made to keep the expressions simple and flexible, while still providing the necessary functionality for most scheduling needs.
Q2: To make a scheduled task in Spring be executed only in 2024,
@Scheduled(cron = "0 0 10 1 1 2024")
public void myTask() {
// This method will be executed at 10:00 AM on January 1, 2024
}
CodePudding user response：
Because crontab doesn't support that as well