Java定时任务

Java定时任务de实现一般有三种方法：thread实现、TimerTask实现、ScheduledExecutorService实现三种。
本文地址：http://blog.csdn.net/shanglianlm/article/details/71022744

1 thread实现（不建议）

// thread 实现    public static void threadTask(){      // run in a second      final long timeInterval = 1000;      Runnable runnable = new Runnable() {        public void run() {          while (true) {            //  run task            System.out.println("Run Task ...... ");            try {               Thread.sleep(timeInterval);            } catch (InterruptedException e) {                e.printStackTrace();            }           }         }      };      Thread thread = new Thread(runnable);      thread.start();           }

2 TimerTask实现
可以控制任务启动和取消，可以设置第一次任务运行的delay时间。

public static void timerTask(){        TimerTask task = new TimerTask(){            public void run() {                // run task                System.out.println("Run Task ...... ");            }        };        Timer timer = new Timer();        long delay = 0;        long intevalPeriod = 1 * 1000;        //timer.scheduleAtFixedRate(task, delay,intevalPeriod);        timer.scheduleAtFixedRate(task, new Date(), intevalPeriod);    }

3 ScheduledExecutorService实现
通过线程池的方式来执行任务，可以设定第一次运行任务delay时间，较好的时间间隔约定。

public static void scheduledExecutorServiceTask(){        Runnable runnable = new Runnable() {            public void run() {                // run task                System.out.println("Run Task ...... ");             }         };         ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();         service.scheduleAtFixedRate(runnable, 0, 1, TimeUnit.SECONDS);         service.scheduleWithFixedDelay(runnable, 0, 1, TimeUnit.SECONDS);    }