动态改变Quartz的调度时间（2）

在动态改变Quartz的调度时间（1）中，使用删除Job然后重新加载实现动态改变调度周期，今天，我自己仔细看了下Quartz的API，发现用另一个方法可以实现这个功能。

版本：

1.8.6

相关链接：

API：http://quartz-scheduler.org/api/1.8.0/ 

http://quartz-scheduler.org/documentation/quartz-1.x/cookbook/UpdateTrigger

相关方法：

rescheduleJob

Date rescheduleJob(String triggerName,                   String groupName,                   Trigger newTrigger)                   throws SchedulerException

Remove (delete) the Trigger with the given name, and store the new given one - which must be associated with the same job (the new trigger must have the job name & group specified) - however, the new trigger need not have the same name as the old trigger.

（删除给定名称的触发器，并且保存新的触发器，新旧触发器的名字相不相同无所谓的。）

Parameters:

triggerName - The name of the Trigger to be replaced.（要替换的触发器的名字）

groupName - The group name of the Trigger to be replaced.（要替换的触发器所在组的名称）

newTrigger - The new Trigger to be stored.（新触发器）

Returns:

null if a Trigger with the given name & group was not found and removed from the store, otherwise the first fire time of the newly scheduled trigger.

Throws:

SchedulerException

具体代码：

/** * 动态修改任务的执行周期 * @param jobName 任务名称 * @param time 执行周期 * @throws SchedulerException * @throws ParseException */public static boolean modifyJobTime(String jobName, String time) throws SchedulerException, ParseException{boolean flag = false;Scheduler sched = sf.getScheduler();JobDetail jobDetail = sched.getJobDetail(jobName, JOB_GROUP_NAME);if(jobDetail != null){Trigger trigger = (CronTrigger)sched.getTrigger(jobDetail.getName(),JOB_TRIGGER_GROUP_NAME);if(trigger != null){CronTrigger ctrigger = (CronTrigger)trigger;String timeOld = ctrigger.getCronExpression();if(!timeOld.equalsIgnoreCase(time)){System.out.println("修改任务："+jobName+"now:"+time);// 修改Triggerctrigger.setCronExpression(time);/** * 更新trigger * sched.rescheduleJob(triggerName, triggerGroupName, newTrigger) */sched.rescheduleJob(jobName, JOB_TRIGGER_GROUP_NAME, ctrigger);flag = true;}}}return flag;}

注：sched.rescheduleJob(jobName, JOB_TRIGGER_GROUP_NAME, ctrigger); 此处jobName就是triggerName，值都一样的。