js 如何遍历 json对象

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

for (let key in jsonObj) {
    if (jsonObj.hasOwnProperty(key)) { // 确保属性属于对象本身
        console.log(key + ": " + jsonObj[key]);
    }
}

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

Object.keys(jsonObj).forEach(function(key) {
    console.log(key + ": " + jsonObj[key]);
});

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

Object.entries(jsonObj).forEach(function([key, value]) {
    console.log(key + ": " + value);
});

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

let jsonObj = {
    "name": "John",
    "age": 30,
    "address": {
        "city": "New York",
        "zip": "10001"
    }
};

traverseJSON(jsonObj);