迭代JSON对象字符串 [英] Iterate JSON object string

问题描述

我是一个javascript noob。在创建json字符串之后，我有一个由google gson API创建的JSON字符串，我将它传递给我的javascript函数。所以在javascript变量中我有一个字符串如下

I am a javascript noob. I have a JSON string created by google gson API after creating the json string which I am passing it to my javascript function. So in a javascript variable I have a string as follows

'{"validationCode":"V10291","caseNumber":"2010CF101011","documentSource":"EFILE","countyDocumentID":"CD102","documentTitle":"D Title","signedDate":"01/01/2012","signedBy":"CPSJC","comments":"YES Comments"}'

如何迭代这个或得到一个关键值的东西就像我必须找到validationCode或caseNumber，但这是String？欢迎任何建议

How to iterate over this or get a value of the key something like I have to find validationCode or caseNumber, but this is String? Any suggestions are welcome

推荐答案

您可以使用 JSON.parse将其添加到本机JavaScript对象中：

var obj = JSON.parse(yourJSONString);

然后你可以用循环标准迭代键

Then you can iterate the keys with a standard for in loop

for(var k in obj)
    if ({}.hasOwnProperty.call(obj, k))
        console.log(k, " = ", obj[k]);

或访问特定密钥，例如 validationCode 或 caseNumber 直接：

Or access particular keys like validationCode or caseNumber directly:

var caseNum = obj.caseNumber;
var validationCode = obj.validationCode;

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请注意，真正的旧浏览器不支持 JSON.parse ，所以如果你想支持它们，你可以使用Papa Crockford的 json2 ，或者jQuery，它有一个 parseJSON 实用程序方法。

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Note that really old browsers don't support JSON.parse, so if you want to support them, you can either use Papa Crockford's json2, or jQuery, which has a parseJSON utility method.

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