Android 日期Util

别人写好的Data 分享一下

public static class Date {
        private static SimpleDateFormat m = new SimpleDateFormat("MM");
        private static SimpleDateFormat d = new SimpleDateFormat("dd");
        private static SimpleDateFormat md = new SimpleDateFormat("MM-dd");
        private static SimpleDateFormat ymd = new SimpleDateFormat("yyyy-MM-dd");
        private static SimpleDateFormat ymdDot = new SimpleDateFormat("yyyy.MM.dd");
        private static SimpleDateFormat ymdhms = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        private static SimpleDateFormat ymdhmss = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        private static SimpleDateFormat ymdhm = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        private static SimpleDateFormat hm = new SimpleDateFormat("HH:mm");
        private static SimpleDateFormat mdhm = new SimpleDateFormat("MM月dd日 HH:mm");
        private static SimpleDateFormat mdhmLink = new SimpleDateFormat("MM-dd HH:mm");

        /**
         * 年月日[2015-07-28]
         *
         * @param timeInMills
         * @return
         */
        public static String getYmd(long timeInMills) {
            return ymd.format(new java.util.Date(timeInMills));
        }

        /**
         * 年月日[2015.07.28]
         *
         * @param timeInMills
         * @return
         */
        public static String getYmdDot(long timeInMills) {
            return ymdDot.format(new java.util.Date(timeInMills));
        }

        public static String getYmdhms(long timeInMills) {
            return ymdhms.format(new java.util.Date(timeInMills));
        }

        public static String getYmdhmsS(long timeInMills) {
            return ymdhmss.format(new java.util.Date(timeInMills));
        }

        public static String getYmdhm(long timeInMills) {
            return ymdhm.format(new java.util.Date(timeInMills));
        }

        public static String getHm(long timeInMills) {
            return hm.format(new java.util.Date(timeInMills));
        }

        public static String getMd(long timeInMills) {
            return md.format(new java.util.Date(timeInMills));
        }

        public static String getMdhm(long timeInMills) {
            return mdhm.format(new java.util.Date(timeInMills));
        }

        public static String getMdhmLink(long timeInMills) {
            return mdhmLink.format(new java.util.Date(timeInMills));
        }

        public static String getM(long timeInMills) {
            return m.format(new java.util.Date(timeInMills));
        }

        public static String getD(long timeInMills) {
            return d.format(new java.util.Date(timeInMills));
        }

        /**
         * 是否是今天
         *
         * @param timeInMills
         * @return
         */
        public static boolean isToday(long timeInMills) {
            String dest = getYmd(timeInMills);
            String now = getYmd(Calendar.getInstance().getTimeInMillis());
            return dest.equals(now);
        }

        /**
         * 是否是同一天
         *
         * @param aMills
         * @param bMills
         * @return
         */
        public static boolean isSameDay(long aMills, long bMills) {
            String aDay = getYmd(aMills);
            String bDay = getYmd(bMills);
            return aDay.equals(bDay);
        }

        /**
         * 获取年份
         *
         * @param mills
         * @return
         */
        public static int getYear(long mills) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(mills);
            return calendar.get(Calendar.YEAR);
        }

        /**
         * 获取月份
         *
         * @param mills
         * @return
         */
        public static int getMonth(long mills) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(mills);
            return calendar.get(Calendar.MONTH) + 1;
        }


        /**
         * 获取月份的天数
         *
         * @param mills
         * @return
         */
        public static int getDaysInMonth(long mills) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(mills);

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

            switch (month) {
                case Calendar.JANUARY:
                case Calendar.MARCH:
                case Calendar.MAY:
                case Calendar.JULY:
                case Calendar.AUGUST:
                case Calendar.OCTOBER:
                case Calendar.DECEMBER:
                    return 31;
                case Calendar.APRIL:
                case Calendar.JUNE:
                case Calendar.SEPTEMBER:
                case Calendar.NOVEMBER:
                    return 30;
                case Calendar.FEBRUARY:
                    return (year % 4 == 0) ? 29 : 28;
                default:
                    throw new IllegalArgumentException("Invalid Month");
            }
        }


        /**
         * 获取星期,0-周日,1-周一，2-周二，3-周三，4-周四，5-周五，6-周六
         *
         * @param mills
         * @return
         */
        public static int getWeek(long mills) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(mills);

            return calendar.get(Calendar.DAY_OF_WEEK) - 1;
        }

        /**
         * 获取当月第一天的时间（毫秒值）
         *
         * @param mills
         * @return
         */
        public static long getFirstOfMonth(long mills) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(mills);
            calendar.set(Calendar.DAY_OF_MONTH, 1);

            return calendar.getTimeInMillis();
        }

    }