直接贴代码：

import java.util.Calendar;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

public class TestSchedule {

static int count = 0;

public static void showTimer() {

TimerTask task = new TimerTask() {

@Override

public void run() {

++count;

System.out.println("时间=" + new Date() + " 执行了" + count + "次"); // 1次

}

};

//设置执行时间

Calendar calendar = Calendar.getInstance();

int year = calendar.get(Calendar.YEAR);

int month = calendar.get(Calendar.MONTH);

int day = calendar.get(Calendar.DAY_OF_MONTH);//每天

//定制每天的21:09:00执行，

calendar.set(year, month, day, 16, 55, 00);

Date date = calendar.getTime();

Timer timer = new Timer();

System.out.println(date);

int period = 2 * 1000;

//每天的date时刻执行task，每隔2秒重复执行

timer.schedule(task, date, period);

//每天的date时刻执行task, 仅执行一次

//timer.schedule(task, date);

}

public static void main(String[] args) {

showTimer();

}

}