Spring Quartz2 动态任务的实例详解

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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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