Question

我正在研究json，我想知道这是否是编写嵌套的多维json对象的正确方法。我写道：

var foo = {
    "logged_in":true,
    "town":"Dublin",
    "state":"Ohio",
    "country":"USA",
    "products":2,
    "0":{
        "pic_id":"1500",
        "description":"Picture of a computer",
        "localion":"img.cloudimages.us/2012/06/02/computer.jpg",
        "type":"jpg",
        "childrenimages":2

        "0":{
        "pic_id":"15011",
        "description":"Picture of a cpu",
        "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
        "type":"png"
          }
        "1":{
        "pic_id":"15012",
        "description":"Picture of a cpu two",
        "localion":"img.cloudimages.us/2012/06/02/thiscpu.png",
        "type":"png"
          }
    },
    "1":{
        "pic_id":"1501",
        "description":"Picture of a cpu",
        "localion":"img.cloudimages.us/2012/06/02/cpu.png",
        "type":"png"
    }
};

如果我的对象变得太嵌套了，我应该遵循这个约定吗？

Answer 1

考虑使用数组而不是数字对象。

json中的数组是使用[]定义的 http://www.json.org/

以下是一个例子：

var foo = {
    "logged_in":true,
    "town":"Dublin",
    "state":"Ohio",
    "country":"USA",
    "products":
    [
        {
            "pic_id":"1500",
            "description":"Picture of a computer",
            "localion":"img.cloudimages.us/2012/06/02/computer.jpg",
            "type":"jpg",
            "childrenimages":
            [
                {
                    "pic_id":"15011",
                    "description":"Picture of a cpu",
                    "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
                    "type":"png"
                },
                {
                    "pic_id":"15012",
                    "description":"Picture of a cpu two",
                    "localion":"img.cloudimages.us/2012/06/02/thiscpu.png",
                    "type":"png"
                }
            ]
        },
        {
            "pic_id":"1501",
            "description":"Picture of a cpu",
            "localion":"img.cloudimages.us/2012/06/02/cpu.png",
            "type":"png"
        }
    ],
};

（如果我忘记关闭{或[或者，很难在SO中输入代码：p），请原谅我

这样你甚至不需要像

这样的计数

"products":2,

或

"childrenimages":2

您只需

foo.products.length

或

foo.products[0].childrenimages.length

祝你好运：）

Answer 2

这是您数据的正确格式（注意我自己更改了一些数据）

{
    "logged_in":true,
    "town":"Dublin",
    "state":"Ohio",
    "country":"USA",
    "products":2,
    "productinfo":[
        {
            "0":{
                "pic_id":"1500",
                "description":"Picture of a computer",
                "localion":"img.cloudimages.us/2012/06/02/computer.jpg",
                "type":"jpg",
                "childrenimages":2
            },
            "1":{
                "pic_id":"15011",
                "description":"Picture of a cpu",
                "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
                "type":"png"
            },
            "2":{
                "pic_id":"15012",
                "description":"Picture of a cpu two",
                "localion":"img.cloudimages.us/2012/06/02/thiscpu.png",
                "type":"png"
            },
            "3":{
                "pic_id":"1501",
                "description":"Picture of a cpu",
                "localion":"img.cloudimages.us/2012/06/02/cpu.png",
                "type":"png"
            }
        }
    ]
}

Answer 3

这实际上并不是你在那里的数组，它只是一个包含属性的对象。你也错过了一些逗号，所以这甚至都不会编译。

在这种情况下，对您来说更方便的是使用数组和对象来形成您的JSON。例如：

 var this_json_string = {
    "state":"Ohio",
    "country":"USA",
    "products":[
        {
          "pic_id":"1500",
          "description":"Picture of a computer",
        },

        {
          "pic_id":"15011",
          "description":"Picture of a cpu"
        },
        {
          "pic_id":"15012",
          "description":"Picture of a cpu two"
        },
        {
          "pic_id":"1501",
          "description":"Picture of a cpu"
        }
    ]
};

Answer 4

不要写JSON。说真的，除了简单的配置文件外，不要编写JSON。

您可以使用实用程序将对象转换为大多数语言的JSON字符串（如果不是）。

PHP：json_encode($array);

Javascript：JSON.stringify( obj );

等

手动编写JSON通常会导致语法错误。在您看到缺少逗号或w / e之前，会让您头疼的那种。你有很好的工具来做到这一点，使用它们。您可以与XML进行比较，但是当您输入时，JSON没有工具（IDE，文本编辑器）说“这种语法错误”。例如，没有编辑会告诉您使用单引号而不是双引号。

只是不要写JSON。

如何编写嵌套的多维json对象

4 个答案: