Flutter:无法使用rootBundle读取本地json文件

flutter:
  assets:
    - assets/your_json_file.json

import 'dart:convert';
import 'package:flutter/services.dart' show rootBundle;

Future<String> loadJsonData() async {
  String jsonString = await rootBundle.loadString('assets/your_json_file.json');
  return jsonString;
}

void main() {
  loadJsonData().then((jsonString) {
    Map<String, dynamic> jsonData = json.decode(jsonString);
    // 处理json数据
  });
}

dependencies:
  flutter:
    sdk: flutter
  path_provider: ^2.0.2

import 'dart:convert';
import 'dart:io';
import 'package:path_provider/path_provider.dart';

Future<String> loadJsonData() async {
  Directory directory = await getApplicationDocumentsDirectory();
  File file = File('${directory.path}/your_json_file.json');
  String jsonString = await file.readAsString();
  return jsonString;
}

void main() {
  loadJsonData().then((jsonString) {
    Map<String, dynamic> jsonData = json.decode(jsonString);
    // 处理json数据
  });
}