如何解析API返回的无引号键对象数组字符串？

我从API获取到一段类JSON格式的字符串，但对象的键未添加引号，无法直接用JSON.parse()解析。字符串内容如下：

'[
  {
    q: "What does DSA stand for?",
    o1: "Data Structure Algorithm",
    o2: "Data Structure and Architecture",
    o3: "Dynamic System Analysis",
    o4: "Digital System Automation"
  },
  {
    q: "What is the primary goal of Object-Oriented Programming?",
    o1: "Efficiency",
    o2: "Code reusability",
    o3: "Low memory usage",
    o4: "Shorter development time"
  },
  {
    q: "Explain the concept of inheritance in OOP.",
  },
  {
    q: "What is the time complexity of searching in a binary search tree?",
  },
  {
    q: "Write a function to check if a given string is a palindrome.",
  },
  {
    q: "Given a sorted array, find the index of a specific element using binary search.",
  },
  {
    q: "Implement a queue data structure using stacks.",
  }
]'

我尝试了以下代码，但未能成功解析：

// Remove line breaks and leading/trailing whitespace
const cleanedResponse = response.replace(/\s+/g, '');

// Convert keys to strings (double quotes)
const jsonString = cleanedResponse.replace(/([a-zA-Z0-9_]+):/g, '"$1":');

// Convert single quotes to double quotes (for property values)
const validJsonString = jsonString.replace(/'([^']+)'/g, '"$1"');

console.log(JSON.parse(validString));

你的代码存在几处关键问题，修正后即可正常解析：

1. 变量名不匹配：最后解析用的validString和前面定义的validJsonString不一致
2. 未处理HTML转义字符：字符串中的"是HTML转义的双引号，需先转为真实的"
3. 未移除首尾单引号：原始字符串被单引号包裹，不符合JSON格式要求
4. 未清理对象末尾的多余逗号：JSON不允许属性列表最后一项后保留逗号

修正后的完整代码：

// 假设response是API返回的原始字符串
const response = `'[
  {
    q: "What does DSA stand for?",
    o1: "Data Structure Algorithm",
    o2: "Data Structure and Architecture",
    o3: "Dynamic System Analysis",
    o4: "Digital System Automation"
  },
  {
    q: "What is the primary goal of Object-Oriented Programming?",
    o1: "Efficiency",
    o2: "Code reusability",
    o3: "Low memory usage",
    o4: "Shorter development time"
  },
  {
    q: "Explain the concept of inheritance in OOP.",
  },
  {
    q: "What is the time complexity of searching in a binary search tree?",
  },
  {
    q: "Write a function to check if a given string is a palindrome.",
  },
  {
    q: "Given a sorted array, find the index of a specific element using binary search.",
  },
  {
    q: "Implement a queue data structure using stacks.",
  }
]'`;

// 1. 移除首尾的包裹单引号
const withoutWrapQuotes = response.replace(/^'|'$/g, '');

// 2. 把HTML转义的"转为真实双引号
const unescaped = withoutWrapQuotes.replace(/"/g, '"');

// 3. 清理对象末尾的多余逗号
const cleanedCommas = unescaped.replace(/\s*,\s*}/g, '}');

// 4. 给无引号的键添加双引号
const validJson = cleanedCommas.replace(/([a-zA-Z0-9_]+):/g, '"$1":');

// 5. 解析JSON并输出
try {
  const parsedData = JSON.parse(validJson);
  console.log(parsedData);
} catch (err) {
  console.error('解析失败:', err);
}

关键修复说明 #

• 移除包裹单引号：原始字符串首尾的单引号不属于JSON结构，必须先剔除
• 转义HTML实体："是HTML对双引号的转义，需还原为"才能被JSON识别
• 清理多余逗号：JSON语法严格禁止属性列表末尾保留逗号，否则会触发解析错误
• 统一变量名：确保解析时使用的变量和前面处理后的变量名一致

内容的提问来源于stack exchange，提问作者SaifUllah