java定時任務的實作方法

import java.util.Timer;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

public class SmsListener implements ServletContextListener{
private Timer timer=null;

public void contextDestroyed(ServletContextEvent sce) {
timer.cancel();
}

public void contextInitialized(ServletContextEvent sce) {
timer=new Timer(true);
//設定任務計劃，啟動和間隔時間
timer.schedule(new NoteReplyTask(), 0, 86400000);
}

}

public class MyTask extends TimerTask {

public void run() {
// System.out.println("call at " + (new Date()));
// TODO 此處新增具體任務代碼
}

}