Flutter日本节假日获取插件holiday_jp的使用

holiday_jp-dart

该库为Dart提供了日本节假日数据，数据来源于holiday_jp。

使用示例

示例代码

下面是一个完整的示例代码，展示了如何在Flutter项目中使用holiday_jp插件来获取和处理日本节假日信息：

import 'package:holiday_jp/holiday_jp.dart' as holiday_jp;
import 'package:intl/intl.dart';

final _formatter = DateFormat('yyyy-MM-dd');

void main() {
  // 获取特定日期的节假日信息
  final marineDay = DateTime.utc(2020, 7, 23);
  final holiday = holiday_jp.getHoliday(marineDay);
  if (holiday == null) {
    throw Exception('holiday must not be null');
  }
  print('${holiday.date} is ${holiday.nameEn} in Japan.\n');

  // 检查特定日期是否为节假日
  final isMarineDayHoliday = holiday_jp.isHoliday(marineDay);
  print(
      'The question whether Marine Day is a holiday or not is $isMarineDayHoliday.\n');

  // 获取指定时间段内的所有节假日
  final start = DateTime.utc(2022, 1, 1);
  final end = DateTime.utc(2022, 1, 15);
  final holidays = holiday_jp.between(start, end);
  print(
      'Holidays between ${_formatter.format(start)} and ${_formatter.format(end)} are the followings.');
  for (final holiday in holidays) {
    print('- ${holiday.date} is ${holiday.nameEn}');
  }
}

完整示例Demo

为了更好地理解如何在Flutter应用中使用holiday_jp插件，下面提供了一个完整的Flutter Demo项目结构及代码实现。

项目结构

flutter_holiday_demo/
├── lib/
│   └── main.dart
├── pubspec.yaml
└── ...

pubspec.yaml

确保在pubspec.yaml文件中添加了holiday_jp依赖项：

dependencies:
  flutter:
    sdk: flutter
  holiday_jp: ^1.0.0 # 请根据实际情况选择最新版本
  intl: ^0.17.0 # 用于日期格式化

lib/main.dart

import 'package:flutter/material.dart';
import 'package:holiday_jp/holiday_jp.dart' as holiday_jp;
import 'package:intl/intl.dart';

final _formatter = DateFormat('yyyy-MM-dd');

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Japanese Holidays',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HolidayPage(),
    );
  }
}

class HolidayPage extends StatefulWidget {
  @override
  _HolidayPageState createState() => _HolidayPageState();
}

class _HolidayPageState extends State<HolidayPage> {
  List<String> holidayList = [];

  @override
  void initState() {
    super.initState();
    fetchHolidays();
  }

  Future<void> fetchHolidays() async {
    final start = DateTime.utc(2022, 1, 1);
    final end = DateTime.utc(2022, 12, 31);
    final holidays = holiday_jp.between(start, end);

    setState(() {
      holidayList = holidays.map((holiday) =>
          '${holiday.date} is ${holiday.nameEn}').toList();
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Japanese Holidays'),
      ),
      body: ListView.builder(
        itemCount: holidayList.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(holidayList[index]),
          );
        },
      ),
    );
  }
}

这个示例展示了如何在Flutter应用中使用holiday_jp插件来获取并显示2022年全年的日本节假日信息。通过这个示例，您可以轻松地集成和使用holiday_jp插件来满足您的需求。

更新节假日数据

要更新生成的节假日文件，请运行以下命令：

./tool/update_holidays.sh

以上就是关于holiday_jp插件的详细使用说明和示例代码。希望这些内容能帮助您更好地理解和使用该插件。如果有任何问题或需要进一步的帮助，请随时提问！