java 定时任务线程池的使用

方法1
 ThreadPool tp = new ThreadPool(128);
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                System.out.println(new Date());
                /*
                 * List<Job> jobs = mapper.JobListNotDone(); for(Job job : jobs) { Task task =
                 * new Task(job.getUuid()); tp.IssueOperation(task); }
                 */
            }
        },1000,3000);
    }

方法二
public class Main{
    
    
    static class LongRunningTask extends TimerTask{
 
    @Override
    public void run() {
         
        System.out.println("Long running finished"+DateUtil.now());
       
    }
    
    /*
     * public static void main(String[] args){ int sleepTime=2*1000;
     * ScheduledExecutorService scheduledExecutor =
     * Executors.newSingleThreadScheduledExecutor();
     * scheduledExecutor.scheduleAtFixedRate( new Runnable() {
     * 
     * @Override public void run() {
     * System.out.println("ScheduledExecutorService方式执行一次定时任务"); } } ,1,sleepTime,
     * TimeUnit.SECONDS); }
     */   
    
}
static class  FixedDelayTask extends TimerTask{
 
    @Override
    public void run() {
        System.out.println(DateUtil.now());
    }
}
    public static void main(String[] args)  {
          System.out.println(DateUtil.now());
          ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(500);
          scheduledExecutorService.schedule(new LongRunningTask(),5000,TimeUnit.MILLISECONDS);
          scheduledExecutorService.schedule(new LongRunningTask(),10000,TimeUnit.MILLISECONDS);
          scheduledExecutorService.schedule(new LongRunningTask(),15000,TimeUnit.MILLISECONDS);
       
      //scheduledExecutorService.scheduleWithFixedDelay(new FixedDelayTask(),100,1000,TimeUnit.MILLISECONDS);
    }
}

转自 

* https://blog.csdn.net/huawuqueisme/article/details/89715385?utm_medium=distribute.pc_relevant.none-task-blog-title-2&spm=1001.2101.3001.4242