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>