Java定时执行任务

周期执行任务：

Timer timer = new Timer();

if(strategy.equals(STRATEGE_REPEAT)) {
	
	Class<?> clz = Class.forName(task);
	TimerTask ctr = (TimerTask)clz.newInstance();
	
	timer.schedule(ctr, 0, freq*1000);
}

每日定时执行任务

public final static long PERIOD_DAY = 24 * 60 * 60 * 1000;

Date firstTime 	= null;
Calendar calendar = Calendar.getInstance();  

// hour:min:sec
Scanner scanner = new Scanner("09:01:01");
scanner.useDelimiter(":");

int hour = scanner.nextInt();
int minute = scanner.nextInt();
int second = scanner.nextInt();

// firstTime (today)
calendar.set(Calendar.HOUR_OF_DAY, hour);  
calendar.set(Calendar.MINUTE, minute);  
calendar.set(Calendar.SECOND, second);  
firstTime = calendar.getTime();

Timer timer = new Timer();

if(strategy.equals(STRATEGE_DAILY)){
	Class<?> clz = Class.forName(Global.TASK_PACKAGE_PREFIX + task);
	TimerTask ctr = (TimerTask)clz.newInstance();
	
	timer.schedule(ctr, firstTime, Global.PERIOD_DAY);
}