java.util.timer每天 在固定时间

 方法1

 //24小时毫秒数
 long dateSpan = 24*60*60*1000

 final String time = "15:30:00";
 final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd " + time);
 Date startTime;
 try {
     startTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(sdf.format(new Date()));
     timer = new Timer();
     //24小时执行1次
     timer.schedule(new MemberTask(), startTime, 24 * 60 * 60 * 1000);
     //24小时执行2次
     timer.scheduleAtFixedRate(task, startTime, daySpan);
 } catch (final ParseException e) {
     e.getStackTrace();
 }

 方法2

  Calendar cal = Calendar.getInstance();
   int year = cal.get(Calendar.YEAR);
   int month=cal.get(Calendar.MONTH)+1;
   int day = cal.get(Calendar.DAY_OF_MONTH);
   int hour = cal.get(Calendar.HOUR_OF_DAY);
   int minute = cal.get(Calendar.MINUTE);
   int second = cal.get(Calendar.SECOND);
   注意：月份，实际的月份要比Clendar得到的加1，因为java月份是从0~11
 Timer timer = new Timer();
 MyTask task = new MyTask();
 //Calendar cal = new GregorianCalendar(2006, 9, 28, 12, 49, 0);
 Calendar cal = new GregorianCalendar(year, month, day, hour, minute, second);
 Date date = cal.getTime();
 System.out.println("date :" + date.toLocaleString());
 timer.schedule(task, date, 1000);