Parses the conversion between JSON objects and strings.

This article mainly introduces the conversion between JSON objects and strings in detail. For more information, see, I hope to help you. This article mainly introduces the conversion between JSON objects and strings in detail. If you need it, you can refer to it for help.

During the development process, if the front and back ends of a few parameters are passed, you can directly use the ajax data function, which is passed in json format, and the background Request can be used, but sometimes, multiple parameters need to be passed, so that the background

When receiving the Request, it is very troublesome. At this time, the Request must be passed in the form of a class or a set.

For example, the foreground transmits a JSON object in the class format:

Var jsonUserInfo = "{\" TUserName \ ": \" "+ userName +" \ ", \" TInterest \ ": \" "+ interest + "\", \ "TSex \": \ "" + sex + "\", \ "TCity \": \ "" + city + "\", \ "TDetail \": \ "" + detail + "\"}";

For example, if the spelled jsonUserInfo does not have an escape character, var jsonArrayFinal = JSON. stringify (jsonArray) is required.

The Code is as follows:

$. Ajax (
{
Type: "post ",
Url: "ReceiveHandler1.ashx ",
Data: {userInfo: jsonUserInfo, flag: "123456", key: "654321 "},
DataType: "text ",
Success: function (data ){
$ ("# PShow" ).html (data );
}
});

If the foreground transmits a JSON array of multiple class formats, that is, the set type:

For example:

[{"Name": "a" },{ "name", "B" },{ "name", "c"}], cannot be passed, JSON is required. stringify converts the array object to a string and then performs AJAX transmission.

For example, if I have two variables, I want to convert a to a string and convert B to a JSON object:

Var a = {"name": "tom", "sex": "male", "age": "24 "};
Var B = '{"name": "Mike", "sex": "female", "age": "29 "}';

Advanced browsers such as Firefox, chrome, opera, safari, ie9, and ie8 can directly use the stringify () and parse () Methods of JSON objects.

JSON. stringify (obj) converts JSON into a string. JSON. parse (string) converts a string to JSON format;

The preceding conversions can be written as follows:
Var a = {"name": "tom", "sex": "male", "age": "24 "};
Var B = '{"name": "Mike", "sex": "female", "age": "29 "}';
Var aToStr = JSON. stringify ();
Var bToObj = JSON. parse (B );
Alert (typeof (aToStr); // string
Alert (typeof (bToObj); // object

JSON. stringify ()

Ie8 (compatible mode), ie7 and ie6 do not have JSON objects, but ie7 and ie6 support JSON objects and their stringify () and parse () methods; you can obtain this js on #. Generally, json2.js is used.

Ie8 (compatible mode), ie7 and ie6 can use eval () to convert strings into JSON objects,

Var c = '{"name": "Mike", "sex": "female", "age": "29 "}';
Var cToObj = eval ("(" + c + ")");
Alert (typeof (cToObj ));

JQuery also provides the JSON format conversion method jQuery. parseJSON (json). It accepts a standard JSON string and returns the parsed JavaScript (JSON) object. If you are interested, you can encapsulate a jQuery extension. jQuery. stringifyJSON (obj) converts JSON into a string.

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