Spring实现动态修改时间参数并手动开启关停操作

@Component
public class MyScheduler {
  int i =0;
  public void run(){
    i++;
    // 任务逻辑  
    System.out.println("第"+(i)+"次开始执行操作... " +"时间：【" 
    + new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS").format(new Date()) 
    + "】"); 
  }
}

 <beans xmlns="http://www.springframework.org/schema/beans" 
  xmlns:task="http://www.springframework.org/schema/task"  
  ...... 
  xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd"> 

<task:scheduled-tasks>  
    <task:scheduled ref="myScheduler" method="run" cron="0/5 * * * * ?"/>  
</task:scheduled-tasks> 

@Service
@Lazy(false)
@EnableScheduling
public class MyScheduler extends BaseService implements SchedulingConfigurer{
  public static String cron = "0/2 * * * * ?";
  int i =0;
  @Override
  public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
    taskRegistrar.addTriggerTask(new Runnable() {
      @Override
      public void run() {
        i++;
        // 需要实现的任务逻辑  
        logger.info("第"+(i)+"次开始执行操作... " +"时间：【" 
        + new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS").format(new Date()) 
        + "】"); 
      }
    }, new Trigger(){ 
      @Override 
      public Date nextExecutionTime(TriggerContext triggerContext) { 
        //任务触发，可修改任务的执行周期  
        CronTrigger trigger = new CronTrigger(cron); 
        Date nextExec = trigger.nextExecutionTime(triggerContext); 
        return nextExec;  
      } 
    }); 
  }
}

<task:executor id="executor" pool-size="10"/> 
  <task:scheduler id="scheduler" pool-size="10"/>
<task:annotation-driven scheduler="scheduler" executor="executor" proxy-target-class="true"/>