dart DateTimeをISO形式に変換（ミリ秒非表示、TimeZone付き）

String makeTimeZoneString(DateTime dateTime) {  
 final offset = dateTime.timeZoneOffset;  
 final sign = offset.isNegative ? "-" : "+";  
 final hour = offset.inHours.toString().padLeft(2, '0');  
 final minutes = (offset.inMinutes % 60).toString().padLeft(2, '0');  
 final timeZone = "$sign$hour:$minutes";  
 return timeZone;  
}  

String toIso8601StringWithTimeZoneWithoutMillSeconds(DateTime dateTime) {  
 return DateFormat("yyyy-MM-dd'T'HH:mm:ss${makeTimeZoneString(dateTime)}")  
 .format(dateTime);  
}

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Related Notes

• dart DateTimeの利用方法まとめ

References

• https://stackoverflow.com/questions/60854312/how-do-i-format-datetime-with-utc-timezone-offset

Tags

• #dart