如何在Node中查询深度嵌套的json？

function findValue(obj, key) {
  let result = null;

  // 检查当前层级是否包含目标key
  if (obj.hasOwnProperty(key)) {
    return obj[key];
  }

  // 遍历当前层级的所有属性
  for (let prop in obj) {
    if (typeof obj[prop] === 'object') {
      // 如果属性的值是对象，则递归调用findValue函数
      result = findValue(obj[prop], key);
      if (result !== null) {
        return result;
      }
    }
  }

  return result;
}

// 示例JSON数据
const jsonData = {
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Street",
    "city": "New York",
    "country": "USA"
  },
  "education": {
    "university": "ABC University",
    "major": "Computer Science",
    "courses": {
      "course1": "Programming",
      "course2": "Database"
    }
  }
};

// 查询嵌套JSON中的值
const result = findValue(jsonData, "course2");
console.log(result); // 输出：Database