使用JavaScript从YQL JSON获取特定数据
我目前正在与爱奥尼亚·科尔多瓦和安古拉鲁斯合作一个小项目。在这个项目中,我想从使用YQL的网站获取当前信息。我的$http.jsonp请求如下所示:使用JavaScript从YQL JSON获取特定数据,javascript,json,angularjs,cordova,yql,Javascript,Json,Angularjs,Cordova,Yql,我目前正在与爱奥尼亚·科尔多瓦和安古拉鲁斯合作一个小项目。在这个项目中,我想从使用YQL的网站获取当前信息。我的$http.jsonp请求如下所示: *"https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20html%20where%20url%3D'http%3A%2F%2Fwww.imensa.de%2Fhildesheim%2Fmensa-uni%2Findex.html'%20and%20xpath%3D'%2F%
*"https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20html%20where%20url%3D'http%3A%2F%2Fwww.imensa.de%2Fhildesheim%2Fmensa-uni%2Findex.html'%20and%20xpath%3D'%2F%2Fdiv%5B%40class%3D%22primary%20meal%22%5D'&format=json&callback=JSON_CALLBACK"*
这转化为YQL控制台查询:
*select * from html where url='http://www.imensa.de/hildesheim/mensa-uni/index.html' and xpath='//div[@class="primary meal"]'*
我现在收到的JSON数据结构对我来说有点混乱,因为它看起来不像直接的JSON
{
"query": {
"count": 8,
"created": "2015-09-03T06:27:03Z",
"lang": "en-US",
"results": {
"div": [
{
"class": "primary meal",
"id": "m2267999",
"div": {
"class": "description",
"p": "Gebackener Seelachs mit Remoulade"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "2,10 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Fisch",
{
"class": "group",
"content": "Zusatz"
},
"Farbstoff",
"Süßungsmittel",
{
"class": "group",
"content": "Allergen"
},
"Ei",
"Gluten",
"Senf",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m3472645",
"div": {
"class": "description",
"p": "Kartoffel-Erbseneintopf in Sojarahm mit Koriander und Minze"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "2,00 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Vegan",
{
"class": "group",
"content": "Zusatz"
},
"Antioxidationsmittel",
{
"class": "group",
"content": "Allergen"
},
"Gluten",
"Soja",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m1258254",
"div": {
"class": "description",
"p": "Hähnchen Piccata mit Tomatensauce"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "2,10 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Geflügel",
{
"class": "group",
"content": "Zusatz"
},
"Farbstoff",
"Geschwefelt",
{
"class": "group",
"content": "Allergen"
},
"Ei",
"Gluten",
"Milch",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m6583065",
"div": {
"class": "description",
"p": "Kräuterkartoffeln"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "0,40 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Vegan",
{
"class": "group",
"content": "Zuletzt"
},
"25.08.2015"
]
}
},
{
"class": "primary meal",
"id": "m3478290",
"div": {
"class": "description",
"p": "Penne Rigate"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "0,40 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Vegan",
{
"class": "group",
"content": "Allergen"
},
"Gluten",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m4797363",
"div": {
"class": "description",
"p": "Pfannengemüse"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "0,50 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Vegan",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m2931855",
"div": {
"class": "description",
"p": "Creme-Dessert Erdbeer"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "0,50 €"
}
},
"ul": {
"class": "attributes",
"li": [
{
"class": "group",
"content": "Allergen"
},
"Milch",
{
"class": "group",
"content": "Zuletzt"
},
"23.07.2015"
]
}
},
{
"class": "primary meal",
"id": "m943602",
"div": {
"class": "description",
"p": "Kirschquark"
},
"p": {
"class": "price",
"span": {
"title": "Preis für Studierende",
"content": "0,50 €"
}
},
"ul": {
"class": "attributes",
"li": [
"Vegetarisch",
{
"class": "group",
"content": "Allergen"
},
"Milch",
{
"class": "group",
"content": "Zuletzt"
},
"gestern"
]
}
}
]
}
}
}
我已经发现我可以使用如下语句遍历此对象:
{{ data.query.results.div.div.p }}
例如,获取始终包含膳食标题的“primary Dine”p标签。但是不总是相同的信息呢?例如,当我想获得一顿饭的所有过敏原时,我必须在饭后获得所有数据
"content": "Allergen"
直到下一天
"class": "group",
我完全不知道该怎么做。
如果您有任何建议,请告诉我。如果将返回的JSON数据粘贴到其中,您可以看到它是有效的JSON。没什么奇怪的
请记住,
data.query.results.div
是一个数组,因此您应该使用angular专用语句进行循环(如果您在angular视图中),或者使用经典的进行循环(如果您在JavaScript文件中)。您可以简单地循环数据,检查过敏原标记,然后添加到数组中。我在这里做了一个JSFiddle:。您可以将此策略扩展到其他数据
var list = data.query.results.div[0].ul.li;
var isAllergen = false;
var allergens = [];
for(var i = 0; i < list.length; i++) {
var item = list[i];
if(item.class && item.class == 'group')
{
if(item.content && item.content == 'Allergen')
{
isAllergen = true;
}
else
{
isAllergen = false;
}
}
else
{
if(isAllergen)
{
allergens.push(item);
}
}
}
var result = '';
for(var i = 0; i < allergens.length; i++) {
result += allergens[i];
if(i < allergens.length - 1) result += ', ';
}
document.getElementById('allergens').innerHTML = result;
var list=data.query.results.div[0].ul.li;
var isAllergen=假;
变应原=[];
对于(变量i=0;i
非常感谢您:D这有助于。。。我已经做了所有的工作来创建一个主细节视图,现在由于你的回答,我可以显示特定的过敏原。我知道stackoverflow告诉我不要在评论中写“谢谢”,但仍然是:D谢谢你也谢谢你:D我真的怀疑JSON数据的结构是否正确。不知道,但我觉得这似乎不对,但我对JavaScript还是新手,我一直认为JSON只有一个层,基本上像{id:'1',name:'test'}等等。。。