Spring Quartz2 动态任务的实例详解

Spring Quartz2 动态任务的实例详解

此处使用的是Quartz中SimpleScheduleBuilder类，非CronScheduleBuilder，CronScheduleBuilder是Cron表达式的。具体请自行百度。

实现代码：

/**
   * 新增任务
   * @param scheduleJob
   * @throws Exception
   */
  @Override
  @SuppressWarnings("unchecked")
  public void addJobSimple(ScheduleJob scheduleJob) throws Exception{
    TriggerKey triggerKey = TriggerKey.triggerKey(scheduleJob.getJobName(), scheduleJob.getJobGroup());
    //任务触发
    Trigger trigger = scheduler.getTrigger(triggerKey);
    if (null == trigger) {
      JobDetail jobDetail = JobBuilder.newJob((Class<? extends Job>) Class.forName(scheduleJob.getClazz()))
       .withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup()).build();
      jobDetail.getJobDataMap().put("scheduleJob", scheduleJob); 

      SimpleScheduleBuilder simpleScheduleBuilder = SimpleScheduleBuilder.simpleSchedule();
      if("秒".equals(scheduleJob.getTimeType()) ||
          "second".equalsIgnoreCase(scheduleJob.getTimeType())){
        simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()).repeatForever();
      }else if("分".equals(scheduleJob.getTimeType()) || "分钟".equals(scheduleJob.getTimeType()) ||
          "minute".equalsIgnoreCase(scheduleJob.getTimeType())){
        simpleScheduleBuilder.withIntervalInMinutes(scheduleJob.getTimeValue()).repeatForever();
      }else if("时".equals(scheduleJob.getTimeType()) || "小时".equals(scheduleJob.getTimeType()) ||
          "hour".equalsIgnoreCase(scheduleJob.getTimeType())){
        simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).repeatForever();
      }else if("天".equals(scheduleJob.getTimeType()) ||
          "date".equalsIgnoreCase(scheduleJob.getTimeType())){
        simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).repeatForever();
      }
      ScheduleBuilder<SimpleTrigger> schedBuilder = simpleScheduleBuilder.withMisfireHandlingInstructionNextWithRemainingCount(); 

      trigger =TriggerBuilder.newTrigger().withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup())
          .withSchedule(schedBuilder).build();
      trigger = TriggerBuilder.newTrigger().withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup()).withSchedule(schedBuilder).build();
      scheduler.scheduleJob(jobDetail, trigger);
      log.info(CC.LOG_PREFIX + "新增简单任务："+JasonUtils.Object2String(scheduleJob));
    }else {
      this.updateJobCron(scheduleJob);
    }
  }

需要注意是的，当定时任务只执行一次时，就要仔细看代码，如上面的简单定时任务，刚开始是我这样的：

simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()); 

结果只执行一次，而我需要的是不断循环执行，最后改成：

simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()).repeatForever();

可以看出，后面多了个：repeatForever()，表示永远重复。

如果是希望执行多少次后不执行，就使用：.withRepeatCount(triggerRepeatCount)，如下：

simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).withRepeatCount(triggerRepeatCount); 

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