dart string to json code example

Example 1: flutter generate json files

flutter packages pub run build_runner build

Example 2: parse json to dart model

import 'dart:convert';

main() {
  String nestedObjText =
      '{"title": "Dart Tutorial", "description": "Way to parse Json", "author": {"name": "bezkoder", "age": 30}}';

  Tutorial tutorial = Tutorial.fromJson(jsonDecode(nestedObjText));

  print(tutorial);

Example 3: flutter convert json string to json

flutter convert json string to json
----------------------
var x1 = '[{"id": "1"}]';
List<dynamic> x2 = jsonDecode(x1);
print(x2[0]);

Example 4: convert json to dart

class Todo {
  int userId;
  int id;
  String title;
  bool completed;

  Todo({this.userId, this.id, this.title, this.completed});

  Todo.fromJson(Map<String, dynamic> json) {
    userId = json['userId'];
    id = json['id'];
    title = json['title'];
    completed = json['completed'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['userId'] = this.userId;
    data['id'] = this.id;
    data['title'] = this.title;
    data['completed'] = this.completed;
    return data;
  }
}