java定时任务Timer和TimerTask使用详解

public class TimerTest { Timer timer; public TimerTest(int time){  timer = new Timer();  timer.schedule(new timerTaskTest(),time*1000);//timer.schedule(执行的方法，延迟多久执行(ms)) } public static void main(String[] args) {  System.out.println("timer begin...");  new TimerTest(3); } class timerTaskTest extends TimerTask{  @Override  public void run() {   System.out.println("time's up!!");  } } }

public class TimerTest1 {  Timer timer;  public TimerTest1(){    Date time = getTime();    System.out.println("指定时间time="+time);    timer = new Timer();    timer.schedule(new TimerTaskTest1(),time);//timer.schedule(执行的方法，要执行的时间)  }  public Date getTime(){//设置执行时间    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.HOUR,5);    calendar.set(Calendar.MINUTE,46);    calendar.set(Calendar.SECOND,00);    Date time = calendar.getTime();    return time;  }  public static void main(String[] args) {    new TimerTest1();  }  class TimerTaskTest1 extends TimerTask{    public void run() {      System.out.println("指定时间执行线程任务...");    }  }}

public class TimerTest2 {  Timer timer;  public TimerTest2(){    timer = new Timer();    timer.schedule(new TimerTaskTest2(),1000,2000);//tiemr.schedule(执行的方法,延迟时间,多久执行一次)  }  class TimerTaskTest2 extends TimerTask{    @Override    public void run() {      System.out.println("本次任务执行时间"+new Date());    }  }  public static void main(String[] args) {    new TimerTest2();  }}

<listener>     <listener-class>com.sxl.ContextListener</listener-class>  </listener>