Spring Boot + Quartz + Angular2 demo application.
It explains how to schedule a cron job, how to pause a job, resume a job, edit quartz job etc. It used PostgreSQL as database for storing quartz jobs and triggers.
Detailed explanation: https://javabypatel.blogspot.com/2017/10/quartz-scheduler-spring-boot-example.html
It contains UI application built on Angular2 for scheduling a job. It also helps in Editing a job, you can also pause a job, resume a job, delete a job etc.