实现多线程定时任务

场景：

后台服务启动时需要启动一个无限循环的定时任务

实现：

.....
public class Demo extends HttpServlet {
	public void init() throws ServletException {
		super.init();
		ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
		scheduler.scheduleWithFixedDelay(new Runner(), 0, 5, TimeUnit.SECONDS);
	}
	
	public class Runner implements Runnable {
		public void run() {
			......
		}
	}
	......
}

备注：与while(true) Thread.sleep方式相比，更容易控制并可轻易实现多线程

原文： http://www.54chen.com/java-ee/java-example-whiletrue-thread-sleep.html