springboot Quartz动态修改cron表达式的方法

 @Bean
  public SchedulerFactoryBean schedulerFactory(){
    SchedulerFactoryBean factoryBean = new SchedulerFactoryBean();
    /*用于Quartz集群,启动时更新已存在的Job*/
    factoryBean.setOverwriteExistingJobs(true);
    /*定时任务开始启动后延迟5秒开始*/
    factoryBean.setStartupDelay(5);
    return factoryBean;
  }

//得到调度器
Scheduler scheduler = schedulerFactoryBean.getScheduler();

//获得触发器
TriggerKey triggerKey = TriggerKey.triggerKey(config.getName(), config.getGroup());
CronTrigger trigger = (CronTrigger)scheduler.getTrigger(triggerKey);

//注释作用,当上一个任务未结束时下一个任务需进行等待
@DisallowConcurrentExecution
public class QuartzJobFactory implements Job {
  public static final  String SCHEDULEJOBKEY="scheduleJob";
  //execute会根据cron的规则进行执行
  @Override
  public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {   
        Config config = (Config) jobExecutionContext.getMergedJobDataMap().get(SCHEDULEJOBKEY);
        TaskUtils.invokMethod(config);
    }
}

public static void invokMethod(Config config){
    Object obj=null;
    Class clazz=null;
    //通过Spring上下文去找 也有可能找不到
   try {
      obj= SpringUtils.getBean(config.getClassPath().split("\\.")[config.getClassPath().split("\\.").length - 1]);
   if (obj == null){
        clazz = Class.forName(config.getClassPath());
        obj = clazz.newInstance();
      }else{
       clazz =obj.getClass();
      }
    }catch (Exception e){
 throw new RuntimeException("ERROR:TaskUtils is Bean Create please check the classpath is`t right or not");
    }
 Method method=null;
    //获得方法名
    try {
      method = clazz.getDeclaredMethod(config.getMethodName());
   } catch (NoSuchMethodException e) {   
   throw new RuntimeException("ERROR:TaskUtils is Bean the method Create please check the methodName is`t right or not");  
   }   
   //方法执行

    try {
      method.invoke(obj);
    } catch (Exception e) {
   throw new RuntimeException("ERROR:TaskUtils is Bean the method execute please check the methodName is`t right or not");
    }
  }

  //将cron表达式进行转换    
  CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(config.getCron());   
  //创建触发器并将cron表达式对象给塞入
  trigger = TriggerBuilder.newTrigger().withIdentity(triggerKey).withSchedule(cronScheduleBuilder).build();
  //在调度器中将触发器和任务进行组合
  scheduler.scheduleJob(jobDetail,trigger);