js遍历json数据实力

{
  "name": "Alice",
  "age": 30,
  "city": "New York"
}

let jsonObj = {
  "name": "Alice",
  "age": 30,
  "city": "New York"
};

for (let key in jsonObj) {
  if (jsonObj.hasOwnProperty(key)) {
    console.log(key + ": " + jsonObj[key]);
  }
}

[
  {"name": "Alice", "age": 30},
  {"name": "Bob", "age": 25},
  {"name": "Carol", "age": 35}
]

let jsonArray = [
  {"name": "Alice", "age": 30},
  {"name": "Bob", "age": 25},
  {"name": "Carol", "age": 35}
];

// 使用for循环
for (let i = 0; i < jsonArray.length; i++) {
  console.log(jsonArray[i].name + ": " + jsonArray[i].age);
}

// 使用forEach方法
jsonArray.forEach(function(item) {
  console.log(item.name + ": " + item.age);
});

let nestedJson = {
  "people": [
    {"name": "Alice", "age": 30},
    {"name": "Bob", "age": 25}
  ],
  "city": "New York"
};

function traverseJSON(obj) {
  for (let key in obj) {
    if (typeof obj[key] === 'object' && obj[key] !== null) {
      traverseJSON(obj[key]); // 递归遍历
    } else {
      console.log(key + ": " + obj[key]);
    }
  }
}

traverseJSON(nestedJson);