Conversion between string and json in js

In data transmission, json is transmitted in the form of text, that is, a string, which is like a Json object: var str1 = '{"name": "Amy", "sex ": "woman"} '; console. log (typeof str1); the experimental type is string;

In actual projects, if you want to obtain the name and sex values, you need to use a Json object through str1.name and str1.sex, in this way, the string type must be converted to a Json object.

I. Method for converting string type to Json object

1. Conversion supported by Javascript: eval

Eval ('+ jsonstr + ')');

Note: enclose a pair of parentheses outside the json characters, ie8 (compatible mode), ie7 and ie6. You can also convert strings into JSON objects using eval (), but these methods are not recommended; the disadvantage is that it is not safe. eval executes the expression in the json string.

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2. Browsers support conversion methods (Firefox, chrome, opera, safari, ie9, ie8) and other browsers:

JSON. parse (jsonstr); // you can convert a json string to a json object.

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On the contrary, the browser provides a method to convert a Json object to a string type:

JSON. stringify (jsonstr); // converts a json object to a json string.

 

3. Conversion supported by jQuery plug-in:

$. ParseJSON (jsonstr); // jQuery. parseJSON (jsonstr), which can convert a json string to a json object

4. Official JSON conversion method:

Http://www.json.org/with a json.js, this IE8 (compatible mode), ie7 and ie6 can support the JSON object and its stringify () and parse () methods;
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II. Method for converting a Json object to a String

The conversion method supported by the browser mentioned above is JSON. stringify (str ):

JSON. stringify (jsonstr); // converts a json object to a json string.