目录1.日期转换成时间戳2.时间戳转换成日期3.创建指定时间 4.计算时间跨度5.字符串转DateTime6.在之前——时间比较7.在之后&mdas
var now=new DateTime.now();
print(now.millisecondsSinceEpoch); //单位毫秒,13位时间戳
var now=new DateTime.now();
var a=now.millisecondsSinceEpoch; // 时间戳*
print(DateTime.fromMillisecondsSinceEpoch(a));
DateTime assignDay = new DateTime(2020,10,10);
print(assignDay); // 2020-10-10 00:00:00.000
// 例如计算1天14小时45分的跨度
Duration timeRemaining = new Duration(days:1, hours:14, minutes:45);
print(timeRemaining); // 38:45:00.000000
DateTime.parse('2019-11-08')
//或者
DateTime.parse('2019-11-08 12:30:05')
var today = DateTime.now();
var date = DateTime.parse("2019-06-20 15:32:41");
today.isBefore(date);
var today = DateTime.now();
var date = DateTime.parse("2019-06-20 15:32:41");
today.isAfter(date);
var today = DateTime.now();
var date = DateTime.parse("2019-06-20 15:32:41");
today.isAtSameMomentAs(date);
var today = DateTime.now(); // 2019-11-08 02:54:53.218443
var fiftyDaysFromNow = today.add(new Duration(days: 5));
print('today加5天:$fiftyDaysFromNow'); // today加5天:2019-11-13 02:54:53.218443
var today = DateTime.now(); // 2019-11-08 02:54:53.218443
var fiftyDaysAGo = today.add(new Duration(days: 5));
print('today加5天:$fiftyDaysAgo '); // today减5天:2019-11-03 02:54:53.218443
var day1 = new DateTime(2019, 6, 20, 17, 30, 20);
var day2 = new DateTime(2019, 7, 21, 0, 0, 0);
print('比较两个时间 差 小时数:${day1.difference(day2)}'); // 比较两个时间 差 小时数:-726:29:40.000000
year、month、day、weekday、hour、minute、second、millisecond、microsecond
var today = DateTime.now();
print(today.year);
DateTime today = DateTime.now();
print('本地时区简码:${today.timeZoneName}'); // 本地时区简码:GMT
DateTime today = DateTime.now();
print('返回UTC与本地时差 小时数:${today.timeZoneOffset}');
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