Quartz框架的核心是调度器。调度器负责管理Quartz应用运行时环境。调度器不是靠自己做所有的工作，而是依赖框架内一些非常重要的部件。Quartz不仅仅是线程和线程管理。-fr a mework is the core of Quartz scheduler. Quartz scheduler application to manage the runtime environment. Scheduler is not doing all the work on their own, but