blocks|key|1543366|text|原始问题：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1543367|jQuery特别强调不包含可公开访问的JSON解析器或编码器。他们希望你使用第三方库来实现这个目的。|1543368|我推荐在json.org上托管的那个：|1543369|https://github.com/douglascrockford/JSON-js/blob/master/json2.js|1543370|或者，您可以使用托管在Google+Code上的jQuery-JSON插件：|1543371|http://code.google.com/p/jquery-json/|1543372|1543373|在回答“为什么jQuery不能让它的解析器可用？”时说：|1543374|jQuery实际上并不包含任何类型的解析器。在jQuery的代码库的AJAX部分中，您可以实际看到它们在lines+572-579上做了什么。|1543375|简而言之，它们实际上会检查您是否包含了外部JSON库，如果找到了，就会使用它进行解析。如果没有包含json，它们将返回包装在函数中的json，有效地返回该json进行计算。非常棘手，但是非常聪明！|1543376|entityMap|0|LINK|mutability|MUTABLE|url|1|2|http://dev.jquery.com/browser/trunk/jquery/src/ajax.js#L572^0|0|5|0|0|0|0|1S|0|0|0|0|11|1|0|0|0|S|0|1G|D|2|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1A|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1B|8|@]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|L|3|M|5|6|7|1F|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1G|8|@]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|P|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1L|8|@$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1O|8|@]|D|@$9|1P|A|1Q|1|1R]]|E|$]]|$1|U|3|V|5|6|7|1S|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|K]]|13|$5|Z|10|11|E|$12|O]]|14|$5|Z|10|11|E|$12|15]]]]

Original Question:

jQuery makes a point of not including a publicly accessible JSON parser or encoder. They want you to use a 3rd party library for that.

I recommend the one hosted at json.org:

<a href="https://github.com/douglascrockford/JSON-js/blob/master/json2.js" rel="noreferrer">https://github.com/douglascrockford/JSON-js/blob/master/json2.js</a>

Alternatively, you could use the jQuery-JSON plugin hosted on Google Code:

<a href="http://code.google.com/p/jquery-json/" rel="noreferrer">http://code.google.com/p/jquery-json/</a>

<hr>

In answer to "why doesn't jQuery make it's parser available?":

jQuery doesn't actually include a parser of any sort. In the AJAX section of jQuery's codebase, you can actually see what they do on <a href="http://dev.jquery.com/browser/trunk/jquery/src/ajax.js#L572" rel="noreferrer">lines 572-579</a>.

The quick version is that they actually do a check to see if you've included an external JSON library such as the one from json.org, and if it finds it, they use that to parse. If you have not included one, they return the json wrapped in a function, effectively returning it for evaluation. Very tricky, but very smart!

blocks|key|335076|text|不幸的是，jQuery不支持使用JSON或JSONP作为数据类型的AJAX函数之外的JSON解析(反序列化与AJAX和回调代码紧密相关)。当然，您可以只做一个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|335077|var+obj+=+eval(test);|code-block|syntax|javascript|335078|但这绝对不是推荐的方式(除非您确信您的字符串只是一个JavaScript对象，而不是要执行的任意源代码)。所以最好的方法可能是使用另一个库，比如JSON2+library+(可以在json.org上找到)。|offset|length|335079|entityMap|0|LINK|mutability|MUTABLE|url|http://www.json.org/js.html|1|http://www.json.org/^0|0|0|20|D|0|2I|8|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@$I|X|J|Y|1|Z]|$I|10|J|11|1|12]]|A|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]|S|$5|N|O|P|A|$Q|T]]]]

Unfortunately jQuery doesn't support JSON parsing outside of the AJAX functions with JSON or JSONP as datatype (deserialization si very tightly bound to the AJAX and Callback code). You can of course just do a

<pre><code>var obj = eval(test);
</code></pre>

But this is definitely not the recommened way (except for when you know for sure that your string is only a JavaScript object and not arbitrary source code to be executed). So the best way is probably to use another library like the <a href="http://www.json.org/js.html" rel="nofollow noreferrer">JSON2 library</a> (found on <a href="http://www.json.org" rel="nofollow noreferrer">json.org</a>).

blocks|key|335096|text|下面是当数据类型设置为"json“时，jQuery在ajax请求中所做的事情(这就是getJSON在幕后所做的事情)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|335097|window["eval"]("("+%2B+data+%2B+")");|code-block|syntax|javascript|335098|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here's what jQuery does in an ajax request when the datatype is set to "json" (which is what getJSON does, under the hood):

<pre><code>window["eval"]("(" + data + ")");
</code></pre>

blocks|key|335111|text|你们知道吗，JSON的意思是"JavaScript+Object+Notation"？如果您对JavaScript对象表示法进行了硬编码，那么只需去掉引号，就可以完成对它的解析，因为JavaScript解析器会处理这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|335112|var+jsonstr+=+"{prop1:+'val1',+prop2:+'val2'}";
var+parsed+=+{prop1:+'val1',+prop2:+'val2'};|code-block|syntax|javascript|335113|很简单，不是吗？！！可能有一些我不知道的事情，但对我来说，很难理解用JavaScript为JavaScript编写解析器的人……当然，如果您不确定jsonstr来源的源代码的安全性，那么直接评估它可能不是最好的主意，但如果您控制源代码，尤其是如果您像问题中所说的那样对其进行硬编码，那么就去掉引号！|335114|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Do you people realize, that JSON means "JavaScript Object Notation"? If you have JavaScript Object Notation hardcoded, then just loose the quotes and you're done with parsing it as JavaScript parser will take care of that.

<pre><code>var jsonstr = "{prop1: 'val1', prop2: 'val2'}";
var parsed = {prop1: 'val1', prop2: 'val2'};
</code></pre>

Easy, wasn't it?!! There might be something I'm not aware of, but for me it is quite difficult to understand people writing parsers in JavaScript for JavaScript... Sure if you're not sure about the security of source your jsonstr comes from, then evaluating it straight out of the box might not be the best idea, but in case you and only you control the source and especially if you're hardcoding it like it was said in the question, then just loose the quotes!

I have a hard-coded JSON string.

<pre><code>var test = "JSON STRING HERE";
</code></pre>

I am using jQuery. I know there is a function like getJSON, but that makes an AJAX call. I want it to parse the hardcoded string so that I can use <code>$.each(test, function(a,b){}))</code>

Thank you for your time.

Parse JSON string

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个硬编码的JSON字符串。var test = "JSON STRING HERE";我正在使用jQuery。我知道有一个像getJSON这样的函数，但它会调用AJAX。我想让它解析硬编码的字符串，这样我就可以使用$.each(test, function(a,b){}))谢谢您抽时间见我。

问解析JSON字符串
EN

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