Spring Boot timed Task

1. First add a comment on the startup initiator @EnableScheduling

2. Add a comment on the task method to be timed @Scheduled (fixedrate = 20000) output at the console every 20 seconds

A cron expression has at least 6 (or possibly 7) time elements that have a space separation.

In order of

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)

7. Year (1970-2099)

Spring Boot timed Task