288 lines
8.8 KiB
Dart
288 lines
8.8 KiB
Dart
class DateFormats {
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static String full = 'yyyy-MM-dd HH:mm:ss';
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static String yMoDHM = 'yyyy-MM-dd HH:mm';
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static String yMoD = 'yyyy-MM-dd';
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static String yMo = 'yyyy-MM';
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static String moD = 'MM-dd';
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static String moDHM = 'MM-dd HH:mm';
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static String hMS = 'HH:mm:ss';
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static String hM = 'HH:mm';
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static String zhFull = 'yyyy年MM月dd日 HH时mm分ss秒';
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static String zhYMoDHM = 'yyyy年MM月dd日 HH时mm分';
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static String zhYMoD = 'yyyy年MM月dd日';
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static String zhYMo = 'yyyy年MM月';
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static String zhMoD = 'MM月dd日';
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static String zhMoDHM = 'MM月dd日 HH时mm分';
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static String zhHMS = 'HH时mm分ss秒';
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static String zhHM = 'HH时mm分';
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}
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class DateUtils {
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/// 月->天数.
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static Map<int, int> monthDay = {
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1: 31,
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2: 28,
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3: 31,
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4: 30,
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5: 31,
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6: 30,
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7: 31,
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8: 31,
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9: 30,
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10: 31,
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11: 30,
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12: 31,
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};
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/// 获取当前时间，默认格式(yyyy-MM-dd HH:mm:ss)
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static String getNowTimeStr({String? format}) {
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return formatDate(DateTime.now(), format: format);
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}
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/// 获取当前时间戳
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static int getNowTimestamp() {
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return DateTime.now().millisecondsSinceEpoch;
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}
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/// 以毫秒为单位格式化日期
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static String formatDateMs(int ms, {bool isUtc = false, String? format}) {
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return formatDate(getDateTimeByMs(ms, isUtc: isUtc), format: format);
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}
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/// 毫秒 转 DateTime
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static DateTime getDateTimeByMs(int ms, {bool isUtc = false}) {
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return DateTime.fromMillisecondsSinceEpoch(ms, isUtc: isUtc);
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}
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/// 日期str 转 毫秒
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static int? getDateMsByTimeStr(String dateStr, {bool? isUtc}) {
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DateTime? dateTime = getDateTime(dateStr, isUtc: isUtc);
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return dateTime?.millisecondsSinceEpoch;
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}
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/// 按日期str格式化日期
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static String formatDateStr(String dateStr, {bool? isUtc, String? format}) {
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return formatDate(getDateTime(dateStr, isUtc: isUtc), format: format);
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}
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/// 日期str 转 DateTime
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static DateTime? getDateTime(String dateStr, {bool? isUtc}) {
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DateTime? dateTime = DateTime.tryParse(dateStr);
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if (isUtc != null) {
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if (isUtc) {
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dateTime = dateTime?.toUtc();
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} else {
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dateTime = dateTime?.toLocal();
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}
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}
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return dateTime;
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}
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/// 按DateTime格式化日期
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/// format 转换格式(已提供常用格式 DateFormats，可以自定义格式：'yyyy/MM/dd HH:mm:ss')
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/// 格式要求
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/// year -> yyyy/yy month -> MM/M day -> dd/d
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/// hour -> HH/H minute -> mm/m second -> ss/s
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static String formatDate(DateTime? dateTime, {String? format}) {
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if (dateTime == null) return '';
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format = format ?? DateFormats.full;
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if (format.contains('yy')) {
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String year = dateTime.year.toString();
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if (format.contains('yyyy')) {
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format = format.replaceAll('yyyy', year);
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} else {
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format = format.replaceAll(
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'yy', year.substring(year.length - 2, year.length));
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}
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}
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format = _comFormat(dateTime.month, format, 'M', 'MM');
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format = _comFormat(dateTime.day, format, 'd', 'dd');
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format = _comFormat(dateTime.hour, format, 'H', 'HH');
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format = _comFormat(dateTime.minute, format, 'm', 'mm');
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format = _comFormat(dateTime.second, format, 's', 'ss');
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format = _comFormat(dateTime.millisecond, format, 'S', 'SSS');
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return format;
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}
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static String _comFormat(int value, String format, String single, String full) {
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if (format.contains(single)) {
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if (format.contains(full)) {
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format = format.replaceAll(full, value < 10 ? '0$value' : value.toString());
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} else {
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format = format.replaceAll(single, value.toString());
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}
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}
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return format;
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}
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/// 工作日
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/// dateTime
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/// isUtc
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/// languageCode zh or en
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/// short
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static String getWeekday(DateTime? dateTime, {String languageCode = 'zh', bool short = false}) {
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if (dateTime == null) return '';
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String weekday = '';
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switch (dateTime.weekday) {
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case 1:
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weekday = languageCode == 'zh' ? '星期一' : 'Monday';
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break;
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case 2:
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weekday = languageCode == 'zh' ? '星期二' : 'Tuesday';
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break;
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case 3:
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weekday = languageCode == 'zh' ? '星期三' : 'Wednesday';
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break;
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case 4:
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weekday = languageCode == 'zh' ? '星期四' : 'Thursday';
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break;
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case 5:
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weekday = languageCode == 'zh' ? '星期五' : 'Friday';
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break;
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case 6:
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weekday = languageCode == 'zh' ? '星期六' : 'Saturday';
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break;
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case 7:
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weekday = languageCode == 'zh' ? '星期日' : 'Sunday';
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break;
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default:
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break;
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}
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return languageCode == 'zh'
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? (short ? weekday.replaceAll('星期', '周') : weekday)
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: weekday.substring(0, short ? 3 : weekday.length);
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}
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/// 以毫秒计算工作日
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static String getWeekdayByMs(int milliseconds, {bool isUtc = false, String languageCode = 'zh', bool short = false}) {
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DateTime dateTime = getDateTimeByMs(milliseconds, isUtc: isUtc);
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return getWeekday(dateTime, languageCode: languageCode, short: short);
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}
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/// 在今年的第几天
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static int getDayOfYear(DateTime dateTime) {
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int year = dateTime.year;
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int month = dateTime.month;
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int days = dateTime.day;
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for (int i = 1; i < month; i++) {
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days = days + monthDay[i]!;
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}
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if (isLeapYearByYear(year) && month > 2) {
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days = days + 1;
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}
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return days;
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}
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/// 在今年的第几天
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static int getDayOfYearByMs(int ms, {bool isUtc = false}) {
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return getDayOfYear(DateTime.fromMillisecondsSinceEpoch(ms, isUtc: isUtc));
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}
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/// 是否是当天
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static bool isToday(int? milliseconds, {bool isUtc = false, int? locMs}) {
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if (milliseconds == null || milliseconds == 0) return false;
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DateTime old =
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DateTime.fromMillisecondsSinceEpoch(milliseconds, isUtc: isUtc);
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DateTime now;
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if (locMs != null) {
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now = DateUtils.getDateTimeByMs(locMs);
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} else {
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now = isUtc ? DateTime.now().toUtc() : DateTime.now().toLocal();
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}
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return old.year == now.year && old.month == now.month && old.day == now.day;
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}
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/// 是否是昨天.
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static bool isYesterday(DateTime dateTime, DateTime locDateTime) {
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if (yearIsEqual(dateTime, locDateTime)) {
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int spDay = getDayOfYear(locDateTime) - getDayOfYear(dateTime);
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return spDay == 1;
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} else {
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return ((locDateTime.year - dateTime.year == 1) &&
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dateTime.month == 12 &&
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locDateTime.month == 1 &&
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dateTime.day == 31 &&
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locDateTime.day == 1);
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}
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}
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/// 是否是昨天
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static bool isYesterdayByMs(int ms, int locMs) {
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return isYesterday(DateTime.fromMillisecondsSinceEpoch(ms),
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DateTime.fromMillisecondsSinceEpoch(locMs));
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}
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/// 是否是本周
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static bool isWeek(int? ms, {bool isUtc = false, int? locMs}) {
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if (ms == null || ms <= 0) {
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return false;
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}
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DateTime oldT = DateTime.fromMillisecondsSinceEpoch(ms, isUtc: isUtc);
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DateTime nowT;
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if (locMs != null) {
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nowT = DateUtils.getDateTimeByMs(locMs, isUtc: isUtc);
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} else {
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nowT = isUtc ? DateTime.now().toUtc() : DateTime.now().toLocal();
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}
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DateTime old =
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nowT.millisecondsSinceEpoch > oldT.millisecondsSinceEpoch ? oldT : nowT;
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DateTime now =
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nowT.millisecondsSinceEpoch > oldT.millisecondsSinceEpoch ? nowT : oldT;
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return (now.weekday >= old.weekday) &&
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(now.millisecondsSinceEpoch - old.millisecondsSinceEpoch <=
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7 * 24 * 60 * 60 * 1000);
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}
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/// 是否同年
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static bool yearIsEqual(DateTime dateTime, DateTime locDateTime) {
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return dateTime.year == locDateTime.year;
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}
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/// 是否同年
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static bool yearIsEqualByMs(int ms, int locMs) {
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return yearIsEqual(DateTime.fromMillisecondsSinceEpoch(ms),
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DateTime.fromMillisecondsSinceEpoch(locMs));
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}
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/// 是否是闰年
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static bool isLeapYear(DateTime dateTime) {
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return isLeapYearByYear(dateTime.year);
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}
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/// 是否是闰年
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static bool isLeapYearByYear(int year) {
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return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
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}
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/// 判断两个 DateTime 是否是同一天
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static bool isSameDay(String date1, String date2) {
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final dateTime1 = getDateTime(date1);
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final dateTime2 = getDateTime(date2);
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if(dateTime1?.year == dateTime2?.year && dateTime1?.month == dateTime2?.month && dateTime1?.day == dateTime2?.day) {
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return true;
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}
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return false;
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}
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/// 如果如果当前月是12，下月年份需要+1
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static int getNextMonthToYear() {
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DateTime dateTime = DateTime.now();
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if(dateTime.month == 12) {
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return dateTime.year + 1;
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}
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return dateTime.year;
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}
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/// 获取当前下月
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static int getNextMonth() {
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DateTime dateTime = DateTime.now();
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if (dateTime.month == 12) {
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return 1;
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}
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return dateTime.month + 1;
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}
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} |