74 lines
1.6 KiB
Dart
74 lines
1.6 KiB
Dart
class TimeUtils {
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/// 年
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static List calcYears({int begin = 1900, int end = 2100}) =>
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_calcCount(begin, end);
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/// 月
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static List calcMonth({int begin = 1, int end = 12}) {
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begin = begin < 1 ? 1 : begin;
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end = end > 12 ? 12 : end;
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return _calcCount(begin, end);
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}
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/// 日
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static List calcDay(int year, int month, {int begin = 1, int end = 31}) {
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begin = begin < 1 ? 1 : begin;
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int days = _calcDateCount(year, month);
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if (end > days) {
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end = days;
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}
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return _calcCount(begin, end);
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}
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/// 时
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static List calcHour({int begin = 0, int end = 23}) {
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begin = begin < 0 ? 0 : begin;
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end = end > 23 ? 23 : end;
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return _calcCount(begin, end);
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}
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/// 分 和 秒
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static List calcMinAndSecond({int begin = 0, int end = 59}) {
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begin = begin < 0 ? 0 : begin;
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end = end > 59 ? 59 : end;
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return _calcCount(begin, end);
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}
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static List _calcCount(begin, end) {
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int length = end - begin + 1;
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if (length == 0) return [begin];
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if (length < 0) return [];
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return List.generate(length, (index) => begin + index);
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}
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// 计算月份所对应天数
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static int _calcDateCount(int year, int month) {
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switch (month) {
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case 1:
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case 3:
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case 5:
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case 7:
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case 8:
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case 10:
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case 12:
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return 31;
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case 2:
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if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
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return 29;
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}
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return 28;
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}
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return 30;
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}
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String intToStr(int v) {
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return (v < 10) ? "0$v" : "$v";
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}
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// String _checkStr(String v) {
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// return v == null ? "" : v;
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// }
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}
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