日期格式化

来源：互联网发布：淘宝上如何申请换货编辑：程序博客网时间：2024/06/15 19:17
public class DateUtils {    public final static String DATE_PATTERN_YYYY_MM_DD = "yyyy-MM-dd";    public final static String DATE_PATTERN_YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";    public final static String DATE_PATTERN_YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";    public final static String DATE_PATTERN_HH_MM_SS = "HH:mm:ss";    public final static String DATE_PATTERN_HH_MM = "HH:mm";    public final static String DATE_PATTERN_YY_M_D = "yy/M/d";    /**     * calendar to string     *     * @param calendar Calendar     * @return String     */    public static String calendarToStrByPattern(Calendar calendar, String pattern) {        SimpleDateFormat format1 = new SimpleDateFormat(pattern);        return format1.format(calendar.getTime());    }    /**     * 匹配pattern获得时间，若无法解析抛出异常     *     * @param dateTimeStr String     * @param patternStr  String     * @return Calendar     * @throws IllegalArgumentException     */    public static Calendar getCalendarByPattern(String dateTimeStr, String patternStr) {        try {            SimpleDateFormat sdf = new SimpleDateFormat(patternStr, Locale.US);            sdf.setLenient(false);            Date d = sdf.parse(dateTimeStr);            Calendar c = Calendar.getInstance();            c.setLenient(false);            c.setTimeInMillis(d.getTime());            return c;        } catch (Exception e) {            throw new IllegalArgumentException(e);        }    }    public static int getIntervalDays(Calendar from, Calendar to) {        long dayMillis = 24 * 60 * 60 * 1000;        int betweenDays;        Calendar c1 = Calendar.getInstance();        c1.set(from.get(Calendar.YEAR), from.get(Calendar.MONTH), from.get(Calendar.DAY_OF_MONTH), 0, 0, 0);        c1.set(Calendar.MILLISECOND, 0);        Calendar c2 = Calendar.getInstance();        c2.set(to.get(Calendar.YEAR), to.get(Calendar.MONTH), to.get(Calendar.DAY_OF_MONTH), 0, 0, 0);        c2.set(Calendar.MILLISECOND, 0);        long a = c1.getTimeInMillis();        long b = c2.getTimeInMillis();        long bt = Math.abs(a - b);        betweenDays = (int)(bt / dayMillis);        return betweenDays;    }    public static int getIntervalDays(String startdate, String enddate, String pattern) {        int betweenDays = 0;        if (startdate == null || enddate == null) {            return betweenDays;        }        Calendar d1 = getCalendarByPattern(startdate, pattern);        Calendar d2 = getCalendarByPattern(enddate, pattern);        return getIntervalDays(d1, d2);    }    /**     * @param time yyyy-MM-dd     * @return 毫秒     * @since 2015年6月12日     */    public static long getStringToDate(String time) {        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");        Date date = new Date();        try {            date = sf.parse(time);        } catch (ParseException e) {            LogUtil.e(e);        }        return date.getTime();    }    /**     * @param time 毫秒     * @return yyyy-MM-dd     * @since 2015年6月12日     */    public static String getDateToString(long time) {        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");        Date d = new Date(time);        return sf.format(d);    }    public static String formatElapsedTime(long elapsedSeconds) {        long hours = 0;        long minutes = 0;        long seconds;        if (elapsedSeconds >= 3600) {            hours = elapsedSeconds / 3600;            elapsedSeconds -= hours * 3600;        }        if (elapsedSeconds >= 60) {            minutes = elapsedSeconds / 60;            elapsedSeconds -= minutes * 60;        }        seconds = elapsedSeconds;        StringBuilder sb = new StringBuilder(8);        Formatter f = null;        try {            f = new Formatter(sb, Locale.getDefault());            if (hours > 0) {                return f.format("%d:%02d:%02d", hours, minutes, seconds).toString();            } else {                return f.format("%02d:%02d", minutes, seconds).toString();            }        } finally {            if (f != null) {                f.close();            }        }    }    /**     * 把时间毫秒值转换为默认的日期格式。<br>     * 例如中国: 2015年6月12日     *     * @param milliseconds 毫秒     * @return 默认的日期格式     * @since 2015年6月12日     */    public static String formatDateDefault(long milliseconds) {        DateFormat format = SimpleDateFormat.getDateInstance();        return format.format(new Date(milliseconds));    }    public static String formatDateDefault(long milliseconds, Locale locale) {        DateFormat format = SimpleDateFormat.getDateInstance(DateFormat.YEAR_FIELD, locale);        return format.format(new Date(milliseconds));    }    /**     * 判断时差是否超过一小时     *     * @param currentTime 现在的时间     * @param lastTime    之前的时间     * @return true - 超过一个小时; false - 不超过一个小时.     */    public static boolean isHourPassed(long currentTime, long lastTime) {        return currentTime - lastTime >= 3600000;    }    public static String getHMSData(long milliseconds) {        SimpleDateFormat sf = new SimpleDateFormat(DATE_PATTERN_HH_MM_SS);        Date d = new Date(milliseconds);        return sf.format(d);    }    public static String getHMData(long milliseconds) {        SimpleDateFormat sf = new SimpleDateFormat(DATE_PATTERN_HH_MM);        Date d = new Date(milliseconds);        return sf.format(d);    }    /**     * 获取友好的时间格式     * <p/>     * 5分钟内：现在 <br/>     * 1小时内：刚刚 <br/>     * 1小时前：HH:mm <br/>     * 0点前：昨天 <br/>     * 7天内：星期W <br/>     * 其他：yy/M/d <br/>     *     * @param context    Context     * @param timeMillis 时间     * @return 友好的时间格式     */    public static String getFriendlyTime(Context context, long timeMillis) {        if (context == null)            return null;        long dTime = System.currentTimeMillis() - timeMillis;        // 未来        if (dTime < 0)            return getFormatData(timeMillis, DATE_PATTERN_YY_M_D);        // 5分钟内        if (dTime < 5 * 60 * 1000)            return context.getString(R.string.date_now);        // 1小时内        if (dTime < 60 * 60 * 1000)            return context.getString(R.string.date_just_now);        // 判断今天/昨天/本周/更早        Calendar last = Calendar.getInstance();        last.setFirstDayOfWeek(Calendar.MONDAY);        last.setTimeInMillis(timeMillis);        // 今天        Calendar temp = Calendar.getInstance();        temp.setFirstDayOfWeek(Calendar.MONDAY);        temp.set(Calendar.MILLISECOND, 0);        temp.set(Calendar.SECOND, 0);        temp.set(Calendar.MINUTE, 0);        temp.set(Calendar.HOUR_OF_DAY, 0);        if (!last.before(temp))            return getHMData(timeMillis);        // 昨天        temp.add(Calendar.DAY_OF_YEAR, -1);        if (!last.before(temp))            return context.getString(R.string.date_yesterday);        // 一周内        temp.add(Calendar.DAY_OF_YEAR, -5);        if (!last.before(temp)) {            int week = last.get(Calendar.DAY_OF_WEEK) - 1;            return context.getResources().getStringArray(R.array.week_name)[week % 7];        }        return getFormatData(timeMillis, DATE_PATTERN_YY_M_D);    }    /**     * 格式化时间     *     * @param timeMillis 时间毫秒值.     * @param pattern    格式, 可以为null使用默认的格式 yyyy-MM-dd HH:mm:ss     * @return 格式化时间     */    public static String getFormatData(long timeMillis, String pattern) {        if (TextUtils.isEmpty(pattern))            pattern = DATE_PATTERN_YYYY_MM_DD_HH_MM_SS;        SimpleDateFormat formatter = new SimpleDateFormat(pattern);        Date curDate = new Date(timeMillis);        return formatter.format(curDate);    }}
0 0