flutter_appfx/lib/util/tools.dart

import 'dart:convert';

export 'hexUtils.dart';



// DateFormat('dd.MM.yy HH:mm:ss').format(dateCreated); // ??

String formatTimeStamp({int? timeStamp, DateTime? date, format='yyyy-MM-dd HH:mm:ss'}) {
  try {
    var time = (date != null) ? date
        : ((timeStamp != null) ? DateTime.fromMillisecondsSinceEpoch(timeStamp) : DateTime.now());

    var dateObj = {
      'M+': time.month, //月份
      'd+': time.day, //日
      'H+': time.hour, //小时
      'm+': time.minute, //分
      's+': time.second, //秒
    };
    RegExp yearReg = RegExp(r"(y+)");
    if (yearReg.hasMatch(format)) {
      var matches = yearReg.allMatches(format);
      String match = "${matches.elementAt(0).group(1)}";
      format = format.replaceAll(match, "${time.year}".substring(4 - match.length));
    }
    dateObj.forEach((key, value) {
      RegExp replaceReg = RegExp(r'(' + key + ')');
      if (replaceReg.hasMatch(format)) {
        var matches = replaceReg.allMatches(format);
        String match = "${matches.elementAt(0).group(1)}";
        format = format.replaceAll(match, (match.length == 1) ? "$value" : "00$value".substring("$value".length));
      }
    });
    return format;

  } catch (error) {
    return '';
  }
}


void printJsonStr(String input) {
  const JsonDecoder decoder = JsonDecoder();
  const JsonEncoder encoder = JsonEncoder.withIndent('  ');
  final dynamic object = decoder.convert(input);
  final dynamic prettyString = encoder.convert(object);
  prettyString.split('\n').forEach((dynamic element) => print(element));
}

void printJson(Map input) {
  const JsonEncoder encoder = JsonEncoder.withIndent('    ');
  final dynamic prettyString = encoder.convert(input);
  prettyString.split('\n').forEach((dynamic element) => print(element));
}