JS encapsulated JSON data

JSON (JavaScript Object Notation) is a simple data format that is lighter than XML. JSON is a native JavaScript format, which means that working with JSON data in JavaScript does not require any special APIs or toolkits.

The rules of JSON are simple: an object is an unordered collection of "name/value pairs". An object starts with "{" (opening parenthesis) and "}" (the closing parenthesis) ends. Each "name" is followed by a ":" (colon); "' Name/value ' pair ' is separated by", "(comma).

Here are some examples of JSON for some simple introduction:

One, you can convert a string that conforms to a certain format into a JSON object by using the Eval function in JavaScript

<script language= "JavaScript" >

function showjsonstring ()

{

Response = (

"[{name: ' Joe ', Age: ' ' ', ' Gender: ' m '},{name: ' Chandler ', Age: ' + ', Gender: ' M '},{name: ' Rose ', Age: ' + ', Gender: ' m '}] "//String form

);

var response1 = "({name: ' Vicson ', Age: ' + ', Gender: ' M '})"; String form, where the parentheses cannot be small

JSON = eval (response);

Json1 = eval (response1);

Alert (Json[0].name + "," + Json[1].age + "," + Json[2].gender);

alert (json1.name);

}

Showjsonstring ();

</script>

Second, directly define the JSON object

<script language= "JavaScript" >

function Showjsonobject ()

{

var user =

{

Username: "Andy",

"Age": 20,

"Info": {"tel": "25003614", "cellphone": "882"},

"Address":

[

{City: "Shenzhen", "Postcode": "0755"},

{"City": "Guangzhou", "Postcode": "020"}

]//address is an array

}//Object form

alert (user.username);

alert (user.age);

alert (User.info.cellphone);

alert (user.address[0].city);

alert (User.address[0].postcode);

}

Showjsonobject ();

</script>

Iii. assigning values to the properties of a JSON object

<script language= "JavaScript" >

function Setjsonobject ()

{

var user=

{

"username": "Andy"

}

User.username = "Tom";

alert (user.username);

}

Setjsonobject ();

</script>

To convert a string into a JSON object through the Parsejson method in Json.js,

Json.js package can be downloaded in http://www.json.org/json-zh.html

<script language= "javascript" src= "Json.js" ></script>

<script language= "JavaScript" >

function Parsejsoneval ()

{

var str = ' {' name ': ' Violet ', ' occupation ': ' character '} ';

var obj = Str.parsejson ();

Alert (obj.tojsonstring ());

alert (obj.name);

}

Parsejsoneval ();

</script>

JS encapsulated JSON data