如何将指定数据转为JSON对象？调用jsonDecode/json.decode时报错

原数据存在以下不符合JSON规范的问题，导致jsonDecode/json.decode调用失败：

• 所有对象键未用双引号包裹：JSON要求键必须是双引号包裹的字符串，原数据中key、value及key的取值persist:auth-cred都未加双引号。
• token、role字段值存在多余嵌套双引号：比如token的值被写成"\"eyJhbGci...\""，这种嵌套双引号会导致解析器识别为无效结构。
• 部分字段的转义逻辑混乱：虽然user字段的JSON字符串转义正确，但外层结构的不规范会整体阻断解析。

修复步骤 #

1. 给所有对象键添加双引号，包括外层的key、value，以及key的取值persist:auth-cred。
2. 移除token、role字段值的外层多余双引号，保留原始字符串内容（比如把"\"eyJhbGci...\""改为"eyJhbGci..."）。
3. 确保所有嵌套JSON字符串的转义符正确，user和_persist字段的转义无需修改。

修复后的完整JSON #

[
  {
    "key": "persist:auth-cred",
    "value": {
      "user": "{\"image\":[\"public/images/branch/1664746288495-65170.jpg\",\"public/images/branch/1664747603436-15997.jpg\"],\"holiday\":\"0\",\"country\":\"India\",\"business_segment\":[{\"value\":\"ab3af5ec-b83a-4918-9be3-d7ac98e24c1f\",\"label\":\"Salons\"},{\"value\":\"1b1def14-3fa2-4799-b118-ce83b66ab72d\",\"label\":\"Skin Care Clinics\"}],\"taxSlab\":18,\"avg_rating\":4.9,\"isActive\":true,\"_id\":\"633a03310705114b4e232c9e\",\"name\":\"The Vega Salon\",\"phone\":\"7062559946\",\"email\":\"abhivjvm@lancersglobal.com\",\"password\":\"$2b$10$p8h6VLgZEjKrE9u8J8UFl.s8JdE0Wghpw/Z4ajcqe8JP.8fQxzci.\",\"gender\":\"unisex\",\"address_line1\":\"Rose Street\",\"address_line2\":\"Malviya Nagar\",\"city\":\"Jaipur\",\"zipcode\":\"302011\",\"website\":\"\",\"gmap\":\"SDC Building, 38-39, Pradhan Marg, Mauji Colony, Moji Nagar, Malviya Nagar, Jaipur, Rajasthan 302017, India\",\"description\":\"Perfect salon for both men and women. Making the best day of your life the most memorable one is a promise extended by us. Our dedicated staff understands the importance of readying you to look your best on your big day. Ensuring the perfect look that compliments both your attire and the wedding theme offering you the best bridal & groom makeup package is our specialty. Whether you want to sport the classic chic look or a vintage boho, we ensure you look pretty n picture perfect and at the centre of everyone’s world.\",\"startTime\":\"2022-10-03T04:30:00.000Z\",\"endTime\":\"2022-10-03T16:30:00.000Z\",\"taxNo\":\"08AARHF1382D1S5\",\"latitude\":26.8592831,\"longitude\":75.80840859999999,\"logo\":\"public/images/branch/1669967198797-79350.jpg\",\"state\":\"NA\",\"countryCode\":91,\"uuid\":\"957672ff-51f7-4528-96ed-84df0ef724d9\",\"businessUuid\":\"949001e9-5ae1-488d-9115-d9405b8021ed\",\"__v\":0,\"otherContact\":\"\",\"id\":\"633a03310705114b4e232c9e\",\"businessCalenderType\":\"shift\"}",
      "authenticated": "true",
      "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjYzM2EwMzMxMDcwNTExNGI0ZTIzMmM5ZSIsImlhdCI6MTY5NzYxMTk3OSwiZXhwIjoxNzAwMjAzOTc5fQ.sDsVKyoODAtl6LLqnLyWcJ6x9VwskXsQGcPIq-Vq6fU",
      "role": "branch",
      "_persist": "{\"version\":-1,\"rehydrated\":true}"
    }
  }
]

解析示例（Dart） #

import 'dart:convert';

void main() {
  String fixedJson = '''[
  {
    "key": "persist:auth-cred",
    "value": {
      "user": "{\"image\":[\"public/images/branch/1664746288495-65170.jpg\",\"public/images/branch/1664747603436-15997.jpg\"],\"holiday\":\"0\",\"country\":\"India\",\"business_segment\":[{\"value\":\"ab3af5ec-b83a-4918-9be3-d7ac98e24c1f\",\"label\":\"Salons\"},{\"value\":\"1b1def14-3fa2-4799-b118-ce83b66ab72d\",\"label\":\"Skin Care Clinics\"}],\"taxSlab\":18,\"avg_rating\":4.9,\"isActive\":true,\"_id\":\"633a03310705114b4e232c9e\",\"name\":\"The Vega Salon\",\"phone\":\"7062559946\",\"email\":\"abhivjvm@lancersglobal.com\",\"password\":\"$2b$10$p8h6VLgZEjKrE9u8J8UFl.s8JdE0Wghpw/Z4ajcqe8JP.8fQxzci.\",\"gender\":\"unisex\",\"address_line1\":\"Rose Street\",\"address_line2\":\"Malviya Nagar\",\"city\":\"Jaipur\",\"zipcode\":\"302011\",\"website\":\"\",\"gmap\":\"SDC Building, 38-39, Pradhan Marg, Mauji Colony, Moji Nagar, Malviya Nagar, Jaipur, Rajasthan 302017, India\",\"description\":\"Perfect salon for both men and women. Making the best day of your life the most memorable one is a promise extended by us. Our dedicated staff understands the importance of readying you to look your best on your big day. Ensuring the perfect look that compliments both your attire and the wedding theme offering you the best bridal & groom makeup package is our specialty. Whether you want to sport the classic chic look or a vintage boho, we ensure you look pretty n picture perfect and at the centre of everyone’s world.\",\"startTime\":\"2022-10-03T04:30:00.000Z\",\"endTime\":\"2022-10-03T16:30:00.000Z\",\"taxNo\":\"08AARHF1382D1S5\",\"latitude\":26.8592831,\"longitude\":75.80840859999999,\"logo\":\"public/images/branch/1669967198797-79350.jpg\",\"state\":\"NA\",\"countryCode\":91,\"uuid\":\"957672ff-51f7-4528-96ed-84df0ef724d9\",\"businessUuid\":\"949001e9-5ae1-488d-9115-d9405b8021ed\",\"__v\":0,\"otherContact\":\"\",\"id\":\"633a03310705114b4e232c9e\",\"businessCalenderType\":\"shift\"}",
      "authenticated": "true",
      "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjYzM2EwMzMxMDcwNTExNGI0ZTIzMmM5ZSIsImlhdCI6MTY5NzYxMTk3OSwiZXhwIjoxNzAwMjAzOTc5fQ.sDsVKyoODAtl6LLqnLyWcJ6x9VwskXsQGcPIq-Vq6fU",
      "role": "branch",
      "_persist": "{\"version\":-1,\"rehydrated\":true}"
    }
  }
]''';
  
  try {
    var parsedData = jsonDecode(fixedJson);
    print('解析成功，获取到key：${parsedData[0]['key']}');
    
    // 解析嵌套的user JSON字符串
    var userInfo = jsonDecode(parsedData[0]['value']['user']);
    print('商家名称：${userInfo['name']}');
  } catch (e) {
    print('解析失败原因：$e');
  }
}

内容的提问来源于stack exchange，提问作者Deepak