我有一个DateTime的实例,我想将其格式化为字符串。我怎么做呢?我想把日期转换成一个字符串,类似于“2013-04-20”。
当前回答
pubspec.yaml:
dependencies:
intl:
main.dart:
import 'package:intl/intl.dart'; // for date format
import 'package:intl/date_symbol_data_local.dart'; // for other locales
void main() {
var now = DateTime.now();
print(DateFormat().format(now)); // This will return date using the default locale
print(DateFormat('yyyy-MM-dd hh:mm:ss').format(now));
print(DateFormat.yMMMMd().format(now)); // print long date
print(DateFormat.yMd().format(now)); // print short date
print(DateFormat.jms().format(now)); // print time
initializeDateFormatting('es'); // This will initialize Spanish locale
print(DateFormat.yMMMMd('es').format(now)); // print long date in Spanish format
print(DateFormat.yMd('es').format(now)); // print short date in Spanish format
print(DateFormat.jms('es').format(now)); // print time in Spanish format
}
结果:
May 31, 2020 5:41:42 PM
2020-05-31 05:41:42
May 31, 2020
5/31/2020
5:41:42 PM
31 de mayo de 2020
31/5/2020
17:41:42
其他回答
如果不想添加另一个库,也可以使用此方法
DateTime dateTime = DateTime.now();
String YYYY_MM_DD = dateTime.toIso8601String().split('T').first;
print(YYYY_MM_DD); //2020-11-23
处理年度季度,从字符串到日期时间,我没有找到合适的解决方案,所以做了这个:
List<String> dateAsList = 'Q1 2001'.split(' ');
DateTime dateTime = DateTime.now();
String quarter = dateAsList[0];
int year = int.parse(dateAsList[1]);
switch(quarter) {
case "Q1": dateTime = DateTime(year, 1);
break;
case "Q2": dateTime = DateTime(year, 4);
break;
case "Q3": dateTime = DateTime(year, 7);
break;
case "Q4": dateTime = DateTime(year, 10);
break;
}
设置你的项目intl包
dateTimeFormet (date){
//MM-dd-yyyy
//yyyy-MM-dd
return DateFormat('dd-MM-yyyy').format(date);// you can set your formet
}
void main (){
var date = 01-11-2022 00 : 00
var _datetime = dateTimeFormet(date);
print(_dateTime);
}
String dateConverter(String date) {
// Input date Format
final format = DateFormat("dd-MM-yyyy");
DateTime gettingDate = format.parse(date);
final DateFormat formatter = DateFormat('yyyy-MM-dd');
// Output Date Format
final String formatted = formatter.format(gettingDate);
return date;
}
您还可以像前面所述的那样指定日期格式:https://pub.dev/documentation/intl/latest/intl/DateFormat-class.html
import 'package:intl/intl.dart';
String formatDate(DateTime date) => new DateFormat("MMMM d").format(date);
出品时间:3月4日