将 JSON 转换为数组 Javascript
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Convert JSON To Array Javascript
提问by user962206
I am currently receiving a JSON Object From the Server side of my application, the result is this
我目前正在从我的应用程序的服务器端接收一个 JSON 对象，结果是这样的
{"tags":"[{value: 2,label: 'Dubstep'},{value: 3,label: 'BoysIIMen'},{value: 4,label:'Sylenth1'}]"}
But then I don't really need the "tags" and the double quotes in the result.
但是我真的不需要结果中的“标签”和双引号。
So what I want is an array representation of that JSON object
所以我想要的是那个 JSON 对象的数组表示
therefore how would I convert this
因此我将如何转换它
{"tags":"[{value: 2,label: 'Dubstep'},{value: 3,label: 'BoysIIMen'},{value: 4,label:'Sylenth1'}]"}
to this
对此
[{value: 2,label: 'Dubstep'},{value: 3,label: 'BoysIIMen'},{value: 4,label:'Sylenth1'}]
Here's the loop that creates the array
这是创建数组的循环
String k = "[";
List<Tag> tg = audioTaggingService.findTagsByName(q);
for(int i = 0; i<audioTaggingService.findTagsByName(q).size();i++){
Tag t = tg.get(i);
if(i == (tg.size() - 1)){
k+="{value: "+t.getId()+",label:'"+t.getName()+"'}";
}else{
k+="{value: "+t.getId()+",label:'"+t.getName()+"'}";
}
}
k+="]";
The result of the code above is this
上面代码的结果是这样的
[{value: 2,label: 'Dubstep'},{value: 3,label: 'BoysIIMen'},{value: 4,label:'Sylenth1'}]
回答by Darin Dimitrov
Assuming you got your server side response in a javascript object called responseyou could parse the tagsstring property using the $.parseJSONfunction. But first you will need to fix your server side code so that it returns a valid JSON string for the tags property (in JSON property names must be enclosed in quotes):
假设您在一个名为的 javascript 对象中获得了服务器端响应，response您可以tags使用该$.parseJSON函数解析字符串属性。但首先您需要修复您的服务器端代码，以便它为 tags 属性返回一个有效的 JSON 字符串（在 JSON 属性名称中必须用引号括起来）：
// This came from the server
var response = {"tags":"[{\"value\": 2,\"label\": \"Dubstep\"},{\"value\": 3,\"label\": \"BoysIIMen\"},{\"value\": 4,\"label\":\"Sylenth1\"}]"};
// Now you could parse the tags string property into a corresponding
// javascript array:
var tags = $.parseJSON(response.tags);
// and at this stage the tags object will contain the desired array
// and you could access individual elements from it:
alert(tags[0].label);
If for some reason you cannot modify your server side script to provide a valid JSON in the tagsproperty you could still use evalinstead of $.parseJSON:
如果由于某种原因您无法修改服务器端脚本以在tags属性中提供有效的 JSON，您仍然可以使用eval而不是$.parseJSON：
var tags = eval(response.tags);
It's not a recommended approach, normally you should avoid using evalbecause it will execute arbitrary javascript.
这不是推荐的方法，通常你应该避免使用，eval因为它会执行任意的 javascript。
回答by Wilher Distu
initSelection: function (element, callback) {
var data = $(element).val();
callback($.parseJSON(data));
}
