Dart：如何将不带引号的json字符串转换为Map

ilmyapht 于 2023-01-28 发布在其他

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如何将不带引号json字符串转换为Map。
我在https://dartpad.dev/上尝试了以下代码，但不起作用：

import 'dart:convert';

void main() async {
  final String raw = "{data: {name: joy, tags: aa,bb, city: jakarta}}";
  print('Test 1: $raw');
  
  final Map<dynamic, dynamic> result = json.decode(raw);
  print('Test 2: $result');
}

这是上面代码的错误：

Test 1: {data: {name: joy, tags: aa,bb, city: jakarta}}
Uncaught Error: FormatException: SyntaxError: Expected property name or '}' in JSON at position 1

而我知道这一点是因为我的json是无效的，如何将我的不带引号的json字符串转换为带引号的json字符串？
实际结果为：

{data: {name: joy, tags: aa,bb, city: jakarta}}

预期结果为：

{"data": {"name": "joy", "tags": "aa,bb", "city": "jakarta"}}

dart

来源：https://stackoverflow.com/questions/75256867/dart-how-to-convert-json-string-without-quotes-to-map

2条答案

按热度按时间

piah890a1#

我用下面的代码修复它，参考这个答案：https://stackoverflow.com/a/71025841/21092577

import 'dart:convert';

void main() async {
  
  String raw = "{data: {name: joy, tags: aa,bb, city: jakarta}}";
  print("Test 0: $raw");
  
  String jsonString = _convertToJsonStringQuotes(raw: raw);
  print("Test 1: $jsonString");
  
  final Map<dynamic, dynamic> result = json.decode(jsonString);
  print('Test 2: $result');
  
}

String _convertToJsonStringQuotes({required String raw}) {
    String jsonString = raw;

    /// add quotes to json string
    jsonString = jsonString.replaceAll('{', '{"');
    jsonString = jsonString.replaceAll(': ', '": "');
    jsonString = jsonString.replaceAll(', ', '", "');
    jsonString = jsonString.replaceAll('}', '"}');

    /// remove quotes on object json string
    jsonString = jsonString.replaceAll('"{"', '{"');
    jsonString = jsonString.replaceAll('"}"', '"}');

    /// remove quotes on array json string
    jsonString = jsonString.replaceAll('"[{', '[{');
    jsonString = jsonString.replaceAll('}]"', '}]');

    return jsonString;
  }

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cngwdvgl2#

您的json无效，请使用https://jsonlint.com/进行验证
json应该是

{
    "data": {
        "name": "joy",
        "tags": "aa,bb",
        "city": "Jakarta"
    }
}

DEMO

import 'dart:convert';

void main() async {
  final String raw = "{" +
"   \"data\": {" +
"       \"name\": \"joy\"," +
"       \"tags\": \"aa,bb\"," +
"       \"city\": \"Jakarta\"" +
"   }" +
"}";

  Map<dynamic, dynamic> resultMap = json.decode(raw);
  print('Test 3: $resultMap');
}

赞(0）回复(0）举报 2023-01-28

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Dart：如何将不带引号的json字符串转换为Map

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