使用 jQuery 访问多维 JSON 数组中的数据

Question

我正在尝试弄清楚如何访问本质上多维 JSON 数组中的数据。

我的 jQuery AJAX 请求如下所示：

 $("#login-form").submit(function(e) {
 e.preventDefault();
 $.ajax({
   type: 'POST',
   url: '/ajax/login',
   data: 'email='+$("#email").val()+'&password='+$("#password").val(),
   success: function(data){

     // FIRE ALERT HERE        
     alert(data.firstname);

     },
     dataType: 'json'
  });
});

这就是我要返回的内容。用户帐户详细信息，以及他们帐户中的产品列表。

{
    "logged_in":true,
    "firstname":"Joe",
    "surname":"Bloggs",
    "Full_name":"Joe Bloggs",
    "email":"[email protected]",
    "phone":"+123456789",
    "website":"",
    "age":"26-35",
    "street":"1 Street Ave",
    "city":"Townland",
    "state":"NA",
    "postcode":"1234",
    "country":"Australia",
    "products":2,
    "0":{
        "product_no":"1087",
        "customer":"2",
        "bought_from":"1",
        "date_of_purchase":"2011-04-08",
        "method":"instore",
        "invoice":"0",
        "current":"1"
    },
    "1":{
        "product_no":"24",
        "customer":"2",
        "bought_from":"1",
        "date_of_purchase":"2011-04-08",
        "method":"instore",
        "invoice":"0",
        "current":"1"
    }
}

如您所见，我正在提醒第一个名字，这很好。我可以使用 data.key 访问第一个维度中的所有内容，但我不确定如何为下一个维度建立索引。显然我想以某种方式展示每一种产品。

非常欢迎提出建议。

Answer 1

在 success 函数中，您可以将 JSON 数据视为 JavaScript 对象。您可以像这样访问产品数组及其内部的对象：

console.log(data.products + " product(s) in data"); // data.products is 2 (integer)
for(var i = 0; i < data.products; i++) {            // 
    var product = data[i.toString()];               // 0.toString() is "0"
                                                    // data["0"] is what you want
                                                    // now product points to the property "0"
    console.log(product.product_no);                // so you can use product.xxx
                                                    // or product["xxx"]
}                                                   // likewise for "1", "2", "3" and so on

如果您不知道控制台是什么，请将 console.log 替换为 alert。

Answer 2

每个产品详细信息都可以通过 data[iProductIndex.toString()] 成员访问。数据存储在 data["0"] 和 data["1"] 内部，因此要访问它们，您需要将整数值转换为字符串。不幸的是，您将无法使用 $.each 循环，因为“0”和“1”是单独的成员对象。将 for 循环与 iProductIndex 结合使用。

Answer 3

Salman A，提供的数据不允许您回答。请参阅 JSON 数组 了解数组定义，使其正常工作按照你的方式，它必须被定义为

{"products" : [ {"product_no":"1087",
        "customer":"2",
        "bought_from":"1",
        "date_of_purchase":"2011-04-08",
        "method":"instore",
        "invoice":"0",
        "current":"1"} ] }

To OP：
警报（数据[“0”]。产品编号）；
警报（数据[“1”][“购买日期”]）；

Answer 4

试试这个

<script type="text/javascript">
var json_string={
    "logged_in":true,
    "firstname":"Joe",
    "surname":"Bloggs",
    "Full_name":"Joe Bloggs",
    "email":"[email protected]",
    "phone":"+123456789",
    "website":"",
    "age":"26-35",
    "street":"1 Street Ave",
    "city":"Townland",
    "state":"NA",
    "postcode":"1234",
    "country":"Australia",
    "products":2,
    "0":{
        "product_no":"1087",
        "customer":"2",
        "bought_from":"1",
        "date_of_purchase":"2011-04-08",
        "method":"instore",
        "invoice":"0",
        "current":"1"
    },
    "1":{
        "product_no":"24",
        "customer":"2",
        "bought_from":"1",
        "date_of_purchase":"2011-04-08",
        "method":"instore",
        "invoice":"0",
        "current":"1"
    }
};

for (key in json_string) {
// Most modern browsers should have hasOwnProperty by now.
// This keeps us from getting farther up the chain.
if (json_string.hasOwnProperty(key)) {
document.write(key + "->" + json_string[key]);
document.write("<br>");
}
}; 


var pro_1= json_string[0]; // here u change 0 with 1 and get the data of "1"

for (key in pro_1) {
if (pro_1.hasOwnProperty(key)) {
document.write(key + "->" + pro_1[key]);
document.write("<br>");
}
}; 

</script>