https://github.com/huangjianke/flutter_easyloading/blob/master/README-zh_CN.md
https://github.com/flutterchina/dio/blob/master/README-ZH.md#%E8%AF%B7%E6%B1%82%E9%85%8D%E7%BD%AE
https://pub.dev/packages/percent_indicator
https://juejin.im/post/6844904165383094280
https://flutter.cn/docs/development/data-and-backend/json
https://juejin.im/post/6844903864852807694
https://github.com/rrousselGit/provider/blob/master/resources/translations/zh-CN/README.md
https://book.flutterchina.club/chapter3/input_and_form.html
https://flutter.cn/docs/development/data-and-backend/json
flutter pub run build_runner build