Flutter timestamp and formatting time

(1) Effect picture

(2) Implementation
Modify the pubspec.yaml file
Import the file shown in the red tick, remind everyone, this file cannot have extra spaces, semicolons, etc. or the format is not equal, otherwise it will cause the download dependency to fail

Copy the following code into the main.dart file to run the

code:

import 'package:flutter/material.dart';
import 'package:date_format/date_format.dart';//导包

void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
        home: FormDemoPage()
    );
  }
}
class DatePickerDemo extends StatefulWidget {
  DatePickerDemo({Key key}) : super(key: key);
  @override
  _DatePickerDemoState createState() => _DatePickerDemoState();
}

class _DatePickerDemoState extends State<DatePickerDemo> {
  var now = DateTime.now();
  

  @override
  void initState() {
    //TODO: implement initState
    super.initState();
   //print(now);//打印当前时间 2020-12-29 06:21:34.729165

    //print(now.millisecondsSinceEpoch);//时间戳  1609222955510
    //print(DateTime.fromMicrosecondsSinceEpoch(1608623002151));//时间戳转换成时间 1970-01-19 14:50:23.002151
    print(formatDate(DateTime(2020, 12, 29), [yyyy, '年', mm, '月', dd]));//打印时间 格式
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("datepicker"),
      ),
      body: Text("日期组件"),
    );
  }
}