extract method to avoid duplicated codes

use junit test to replace main() for testing

Remove duplicate childJobId splices

Using non-final variables to lock can cause thread-safety problems.Ac…

解决任务重试时参数丢失的问题

3rd argument is not used.

Using non-final variables to lock can cause thread-safety problems.According to my understanding, it is appropriate to add the final keyword here

修复 cronGen 丢失 name 问题.