间隔毫秒直到午夜

使用日历来计算它：

        Calendar c = Calendar.getInstance();        c.add(Calendar.DAY_OF_MONTH, 1);        c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        c.set(Calendar.MILLISECOND, 0);        long howMany = (c.getTimeInMillis()-System.currentTimeMillis());