Cron Expression For Every 30 Seconds In Quartz Scheduler?


Answer :

The first element represents the seconds; to run at second 0 and 30 use the following:



0/30 0/1 * 1/1 * ? *



I hope this answer will help you. Please define the cron expression the below 



 0/30 * * * * ? *


And then you go this website and test Cron Expression Generator & Explainer - Quartz.



The same effect we can reach (Quartz Spring) using more simpler construction:



0/30 * * * * ? *


The last asterisk we can omit.



0/30 * * * * ?


Quartz scheduler cron trigger documentation 2.x



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