app-zj/lib/model/string_converter.dart

import 'dart:convert';

import 'package:json_annotation/json_annotation.dart';

/// Json解析num类型
class StringConverter extends JsonConverter<String?, dynamic> {
  const StringConverter();

  @override
  String? fromJson(json) {
    if (json == null) return null;
    // String
    if (json is String) return json;
    // num boolean
    if (json is num || json is bool) return json.toString();
    // List Map Object 转换Json字符串
    if (json is List || json is Map || json is Object)
      return JsonEncoder().convert(json);
    // 其他类型
    return json.toString();
  }

  @override
  toJson(String? object) => object;
}