tree 93cbca66acf7513437fb3bf9bf7355e0e534fa51
parent ad2a2b10ce24ddce94af37021cc3daeb75f39a50
author jasonliaoxiaoge <181276056@qq.com> 1569509607 +0800
committer William Guo <guoyp@apache.org> 1569509607 +0800

add placeholder for cron expression

add placeholder for cron expression, cause java quartz is a little difference from crontab in linux

Author: jasonliaoxiaoge <181276056@qq.com>

Closes #503 from jasonliaoxiaoge/master.