通過json正確解析

Question

我有這個json文件：

{
"categories": [
    {
        "producerName": "Canon",
        "productName": [
            {
                "kamera": "EOS 5D",
                "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
                "kamera": "EOS 5D Mark II",
                "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
                "kamera": "EOS 5D Mark III",
                "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
                "productObj": [
                    {
                        "objektiv": "Canon EF 15mm f/2.8 Fisheye",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon EF 8-15mm f/4L Fisheye USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon EF 14mm f/2.8L USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon 24mm f/1.4 L USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    }
                ]
            },
            {
                "kamera": "EOS 7D",
                "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/",
                "productObj": [
                    {
                        "objektiv": "Canon EF 15mm f/2.8 Fisheye",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon EF 8-15mm f/4L Fisheye USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon EF 14mm f/2.8L USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    },
                    {
                        "objektiv": "Canon 24mm f/1.4 L USM",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    }
                ]
            }
        ]
    },
    {
        "producerName": "Nikon",
        "productName": [
            {
                "kamera": "D800",
                "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/",
                "productObj": [
                    {
                        "objektiv": "Canon EF 15mm f/2.8 Fisheye",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    }
                ]
            }
        ]
    },
    {
        "producerName": "Olympus",
        "productName": [
            {
                "kamera": "OM-D EM-5",
                "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/",
                "productObj": [
                    {
                        "objektiv": "Canon EF 15mm f/2.8 Fisheye",
                        "link": "/uw-ports-fuer/vollformat/canon-ef-8-15mm-f-4l-fisheye-usm/"
                    }
                ]
            }
        ]
    }
]

}

我通過帶有JSON回調的jQuery解析了此文件，效果很好。

唯一的問題是，我想獲得所有帶有連接到“ productObj”的“鏈接”的“ kamera”，但我總是只得到最后一個字符串。

希望您能夠幫助我。

jQuery部分：

$('#model').on("change", function() {
    var indx = $("#cat").find(".selectBox-label").attr("id");
    //console.log(indx);
    var item = '<option id="std">2. Kamera auswählen:</option>';
    for (n=0; n < menu[indx].productName.length; n++){
        item += '<option id="'+[n]+'">' + menu[indx].productName[n].kamera + '</option>';
    }
    $('#camera').html(item);
    $('#camera').selectBox('refresh');
    $('#camera').selectBox('enable');
    $.cookie('m', menu[indx].producerName);
    $.removeCookie('k');
    $.removeCookie('o');


    //second onChange
    $('#camera').on("change", function() {

        var indy = $("#items").find(".selectBox-label").attr("id");
        var goRef = menu[indx].productName[indy].link;

        if(goRef) {

            $.cookie('k', menu[indx].productName[indy].kamera);
            if($(".leftfinder").length > 0) {
                $(".gofind").css({'background': 'url(leftgofind.png)', 'cursor':'pointer'});
            }else {
                $(".gofind").css({'background': 'url(gofindbt.png)', 'cursor':'pointer'});
            }

            $(".gofind").on("click", function() {
                window.location.href = "url"+goRef;
            });
        }
});

Answer 1

使用此代碼，您的屬性將被覆蓋：

var obj = { "kamera": "EOS 5D",
    "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
    "kamera": "EOS 5D Mark II",
    "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
    "kamera": "EOS 5D Mark III",
    "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"
}

等效於：

var obj =   {  "kamera": "EOS 5D Mark III",
    "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"}

這就是為什么只得到最后一個字符串的原因。 您不能使用相同名稱定義具有多個屬性的對象

Answer 2

代替此結構：

 { 
   "kamera": "EOS 5D",
   "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
   "kamera": "EOS 5D Mark II",
   "link": "/unterwassergehaeuse-fuer/canon-eos-5d/",
   "kamera": "EOS 5D Mark III",
   "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"
 }

為什么不擁有：

[
   {
      "kamera": "EOS 5D",
      "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"
   },
   {
      "kamera": "EOS 5D Mark II",
      "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"
   },
   {
      "kamera": "EOS 5D Mark III",
      "link": "/unterwassergehaeuse-fuer/canon-eos-5d/"
   }
]

即一組對象。 然后，您可以對其進行迭代。

Answer 3

這不是很好的JSON結構，您覆蓋了值，因為您使用了相同的鍵

無論如何，這里是如何解析：

$.each(json.categories, function(key, val) {
    $.each(val.productName, function(key, val) {
        console.log("kamera: " + val.kamera + " | link:" + val.link);
    });
});

jsFiddle代碼