我有一个有效的json对象，但是当我尝试使用jquery / javascript从中提取内存时，它总是以'undefined'的形式返回。
var json = (the string below).
var obj = $.parseJSON(JSON.stringify(JSON.stringify(json)));
alert(obj); // alerts the object correctly.
alert(obj.HotelInformationResponse); // undefined..?
alert(obj.HotelInformationResponse.HotelImages); // undefined..?
有谁知道我如何从下面的这个json对象中提取单个hotelImageId？
nb：JSON.stringify两次，因为当我这样做一次时，它仍然说[Object object]
{
"HotelInformationResponse":{
"@hotelId":"106347",
"customerSessionId":"[xxx]",
"HotelImages":{
"@size":"27",
"HotelImage":[
{
"hotelImageId":7092462,
"name":"",
"category":1,
"type":0,
"caption":"Exterior",
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_57_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_57_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7130885,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_58_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_58_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147393,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_59_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_59_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147394,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_60_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_60_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147395,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_61_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_61_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147396,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_62_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_62_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147397,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_63_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_63_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147398,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_64_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_64_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147399,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_65_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_65_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147400,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_66_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_66_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147401,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_67_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_67_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147402,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_68_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_68_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147403,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_69_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_69_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147404,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_70_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_70_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147405,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_71_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_71_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147406,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_72_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_72_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":7147407,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_73_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_73_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694165,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_30_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_30_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694166,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_31_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_31_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694168,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_33_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_33_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694171,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_36_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_36_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694172,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_37_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_37_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694177,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_42_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_42_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694180,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_45_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_45_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694181,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_46_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_46_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":4694182,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_47_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_47_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
},
{
"hotelImageId":6601500,
"name":"",
"category":0,
"type":0,
"url":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_56_b.jpg",
"thumbnailUrl":"http://images.travelnow.com/hotels/1000000/10000/5900/5900/5900_56_t.jpg",
"supplierId":13,
"width":350,
"height":350,
"byteSize":0
}
]
}
}
}
答案 0 :(得分：1)
你写
var json = (the string below).
变量json是string类型。
var obj = $.parseJSON(JSON.stringify(JSON.stringify(json)));
这意味着
JSON.stringify(json)
将字符串序列化为JSON编码的字符串。因此'"a"'成为"\"a\""
JSON.stringify(JSON.stringify(json))
嗯，好像你喜欢stringify ...更多编码...
$.parseJSON(JSON.stringify(JSON.stringify(json))
为什么你没有JSON.parse()。并且双重编码的字符串不会回复给您。
答案 1 :(得分：0)
你必须循环你的对象
然后对于你可以做的每件事
FOREACH（对象，项目） 警报（item.HotelInformationResponse）;
检查完美的代码，我给了你sudo的想法。
答案 2 :(得分：0)
这是一个jsfiddle示例，根据您的请求向您展示如何提取单个hotelImageId：
http://jsfiddle.net/nickadeemus2002/9knzN/
以下是示例中的代码段：
var hotelImage = jsonObj.HotelInformationResponse.HotelImages.HotelImage[0],
singleImageId = hotelImage.hotelImageId;
答案 3 :(得分：0)
它工作正常，这是一个证明它的jsFiddle：http://jsfiddle.net/jesus_tesh/xL4Gw/
我甚至幻想它并使用彩盒 - 点击缩略图它会显示完整尺寸的图像。
<强> JS
var images = json.HotelInformationResponse.HotelImages.HotelImage;
$.each(images, function(idx, data) {
$("#images")
.append($("<div></div>")
.append($("<a></a>").prop("href", data.url).addClass("colorbox")
.append($("<img></img>").prop("src", data.thumbnailUrl)))
.append($("<span></span>").text(data.caption || data.hotelImageId)));
console.log("data", data);
});
$(".colorbox").colorbox();
<强> CSS
html { padding: 20px; }
#images div { display: inline-block; width: 90px; height: 100px; }
#images img { display: block; width: 70px; margin: 0 auto; }
#images span { display: block; text-align: center; }