不使用eval()从循环字符串创建JSON对象树

function createJSONObject(str) {
  const objects = str.split(';'); // 将循环字符串解析为数组
  const root = {}; // 创建根节点对象

  objects.forEach(obj => {
    const [property, value] = obj.split(':'); // 解析属性和值
    const properties = property.split('.'); // 解析属性路径

    let currentNode = root;
    properties.forEach((prop, index) => {
      if (!currentNode[prop]) {
        currentNode[prop] = {}; // 创建属性对应的对象
      }

      if (index === properties.length - 1) {
        currentNode[prop] = JSON.parse(value); // 设置属性值
      }

      currentNode = currentNode[prop]; // 更新当前节点
    });
  });

  return root;
}

const jsonString = 'person.name: "John"; person.age: 30; person.address.city: "New York"; person.address.zip: 12345';
const jsonObject = createJSONObject(jsonString);
console.log(jsonObject);

{
  "person": {
    "name": "John",
    "age": 30,
    "address": {
      "city": "New York",
      "zip": 12345
    }
  }
}