json对象的遍历

JSON 有两种结构
1：对象（JSONObject）:“属性/值”得集合。

    var json = {"name":"Jack","age":20,"id":"123456"};
    for (var obj in json) {
        console.log(obj+':'+json[obj]);
    }

2：数组（JSONArray）：由值组成的有序列表。

    var json = ["Jack","Mike","Tom",20,true];
    for (var i = 0; i < json.length; i++) {
        console.log(json[i]);
    }

复合数组形式的json遍历:

    var json = [["Jack","Mike","Tom",20,true],
                ["Jack","Mike","Tom",20,true],
                ["Jack","Mike","Tom",20,true]];
    for (var i = 0; i < json.length; i++) {
        for (var j = 0; j < json[i].length; j++) {
            console.log(json[i][j]);
        }
    }

复合数组对象形式的json遍历：

    var json = [{"name":"Jack","age":20,"id":"123456"},
                {"name":"Jack","age":20,"id":"123456"},
                {"name":"Jack","age":20,"id":"123456"}];
    for (var i = 0; i < json.length; i++) {
        for (var j in json[i]) {
            console.log(j+':'+json[i][j]);
        }
    }

复合对象形式的json遍历：

    var json = {"josn":{"name":"Jack","age":20,"id":"123456"},
                "josn1":{"name":"Jack","age":20,"id":"123456"},
                "josn2":{"name":"Jack","age":20,"id":"123456"}};
    for (var obj in json) {
        console.log(obj+":");
        for (var obs in json[obj]) {
            console.log(obs+':'+json[obj][obs]);
        }
    }