JS怎么对json第三层对象的集合进行赋值

假设我们有一个包含三层对象的 JSON 数组，格式如下：

[
  {
    "person": {
      "name": {
        "first": "John",
        "last": "Doe"
      },
      "age": 30,
      "address": {
        "street": "123 Main St",
        "city": "Anytown",
        "state": "CA",
        "zip": "12345"
      }
    }
  },
  {
    "person": {
      "name": {
        "first": "Jane",
        "last": "Doe"
      },
      "age": 25,
      "address": {
        "street": "456 Oak St",
        "city": "Sometown",
        "state": "CA",
        "zip": "67890"
      }
    }
  }
]

我们可以使用 JavaScript 对其进行赋值：

// 读取JSON字符串
const jsonString = '[{"person":{"name":{"first":"John","last":"Doe"},"age":30,"address":{"street":"123 Main St","city":"Anytown","state":"CA","zip":"12345"}}},{"person":{"name":{"first":"Jane","last":"Doe"},"age":25,"address":{"street":"456 Oak St","city":"Sometown","state":"CA","zip":"67890"}}}]';
const data = JSON.parse(jsonString);

// 对JSON对象进行赋值
data[0].person.name.first = 'Bob';
data[1].person.age = 28;
data[1].person.address.city = 'Newtown';

// 将更新后的JSON对象转换回字符串
const updatedJsonString = JSON.stringify(data);

在上述代码中，我们首先使用 `JSON.parse()` 方法将 JSON 字符串解析为 JavaScript 对象。然后，我们使用对象的键来访问并修改 JSON 对象的值。最后，我们使用 `JSON.stringify()` 方法将更新后的 JavaScript 对象转换回 JSON 字符串。