Question

我正在 json 上检索一个数组，并使用此函数将其存储在隐藏的input中：

$.post("http://"+ document.domain + baseUrl + "/tickets/getCategoryDepartmentRelation/",
    function(dat){
        $('#departmentsByCategory_array').val(JSON.stringify(dat));         
});

调用返回此值：

{
    "Investigation Request": [
        "Client server",
        "Interface",
        "Engine"
    ],
    "Configure Planning": [
        "Interface",
        "Engine"
    ],
    "Bug Report": [
        "Client server",
        "Interface",
        "Engine",
        "Database"
    ],
    "Development Request": [
        "Interface",
        "Dev Management",
        "Database",
        "Client server",
        "Engine"
    ],
    "Suggestion Box": [
        "Dev Management"
    ],
    "Post Site Feedback": [
        "Web"
    ]
}

这个数组的json表示形式：

Array
(
    [Investigation Request] => Array
        (
            [0] => Client server
            [1] => Interface
            [2] => Engine
        )

    [Configure Planning] => Array
        (
            [0] => Interface
            [1] => Engine
        )

    [Bug Report] => Array
        (
            [0] => Client server
            [1] => Interface
            [2] => Engine
            [3] => Database
        )

    [Development Request] => Array
        (
            [0] => Interface
            [1] => Dev Management
            [2] => Database
            [3] => Client server
            [4] => Engine
        )

    [Suggestion Box] => Array
        (
            [0] => Dev Management
        )

    [Post Site Feedback] => Array
        (
            [0] => Web
        )

)

这会使input填充此数据：

<input type="hidden" name="demo" value="{&quot;Investigation Request&quot;:[&quot;Client server&quot;,&quot;Interface&quot;,&quot;Engine&quot;],&quot;Configure Planning&quot;:[&quot;Interface&quot;,&quot;Engine&quot;],&quot; Bug Report&quot;:[&quot;Client server&quot;,&quot;Interface&quot;,&quot;Engine&quot;,&quot;Database&quot;],&quot; Development Request&quot;:[&quot;Interface&quot;,&quot;Dev Management&quot;,&quot;Database&quot;,&quot;Client server&quot;,&quot;Engine&quot;],&quot;Suggestion Box&quot;:[&quot;Dev Management&quot;],&quot;Ticket Site Feedback&quot;:[&quot;Web&quot;]}" id="departmentsByCategory_array">

我可以用这个来获得完整的数组：

$('#departmentsByCategory_array').val();

但我正在尝试仅检索一个元素的值，例如“Configure Planning”。

如何在Javascript或jQuery中使用这些值？（循环，比较......）

Answer 1

我发现了这个问题。您在json表示中返回了一个额外的空格，因此您想要访问" Bug Report"而不 "Bug Report"。

alert(data[' Bug Report']);

修改后的小提琴：http://jsfiddle.net/8Q4Lf/2/

密钥" Development Request"也是如此。

alert(data[' Development Request']);

Answer 2

var data = JSON.parse($('#departmentsByCategory_array').val());
data['Configure Planning']; //returns Configure Planning array

访问json数组元素

2 个答案: