通过数组中的路径更改json中的值

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}

// JSON字符串
var jsonString = '{"name":"John","age":30,"address":{"street":"123 Main St","city":"New York"}}';

// 将JSON字符串解析为JSON对象
var jsonObject = JSON.parse(jsonString);

// 路径数组
var path = ["address", "city"];

// 获取根对象的值
var currentObject = jsonObject[path[0]];

// 遍历路径数组的剩余键
for (var i = 1; i < path.length - 1; i++) {
  // 获取当前对象的值
  currentObject = currentObject[path[i]];
}

// 修改当前对象的键的值
currentObject[path[path.length - 1]] = "Los Angeles";

// 将修改后的JSON对象转换为JSON字符串
var modifiedJsonString = JSON.stringify(jsonObject);

console.log(modifiedJsonString);

{"name":"John","age":30,"address":{"street":"123 Main St","city":"Los Angeles"}}