cron expression parsing into java date

Question

• my database having 10 18 16 ? * SUN,MON,WED,FRI * cron expression then how to convert into Java date.
• how to comparing with present day time.

Answer 1

I wrote a small class for handling cron expressions, available here: https://github.com/frode-carlsen/cron

Based on Joda-time, but should be fairly easy to port to Java8 time api. This also makes it possible to embed in unit tests, do simulations etc by adjusting the DateTime offset in Joda-time.

It also has pretty good test coverage (was done as TDD Kata).

Update Now supports java 8 time api as well thanks to a contribution from github user https://github.com/zemiak. In both cases, the expression parser is a single, tiny class which can easily be copied into your own project.