任务调度:Timer,Quartz、ElasticJob、Spring Task，LTS(Light Task Scheduler)、XXL-JOB.， opencron

Timer ScheduledExecutorService Quartz Spring Task JCronTab XXL-JOB elastic-job 参考Quartz：https://www.cnblogs.com/aishangJava/p/7587020.html                       https://www.cnblogs.com/vmask/p/8728691

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