如何从JSON对象中获取值

var obj = {
  "name": "John",
  "age": 30,
  "address": {
    "city": "New York",
    "country": "USA"
  }
};

var name = obj.name; // "John"
var city = obj.address.city; // "New York"

var obj = {
  "name": "John",
  "age": 30,
  "address": {
    "city": "New York",
    "country": "USA"
  }
};

var name = obj["name"]; // "John"
var city = obj["address"]["city"]; // "New York"

var obj = {
  "fruits": ["apple", "banana", "orange"]
};

var fruit1 = obj.fruits[0]; // "apple"
var fruit2 = obj["fruits"][1]; // "banana"