get
英[get] 美[ɡɛt]
vt. Get; catch; persuade; receive (punishment, etc.)
vt.& vi. Arrive, come
vi. Become; start; try to deal with; obtain benefits or wealth
n. Reproduce, cub; profit
JSON
Object notation; data format; instance; lightweight data exchange format; representation
ajax getJSON() function syntax
Function:In jQuery 1.2, you can load JSON data from other domains by using a callback function in the form of JSONP, such as "myurl?callback=?". jQuery will automatically replace ? with the correct function name to execute the callback function. Note: The code after this line will be executed before this callback function is executed.
Syntax: jQuery.getJSON(url,data,success(data,status,xhr)
Parameters:
| Parameter | Description |
| url | Required. Specifies the URL to which the request will be sent. |
| data | Optional. Specifies the data to be sent to the server along with the request. |
| success(data,status,xhr) | Optional. Specifies the function to be run when the request is successful. Additional parameters: response - Contains the result data from the request status - Contains the status of the request xhr - Contains the XMLHttpRequest object |
Description: This function is the abbreviated Ajax function, equivalent to: $.ajax({url: url,data: data, success: callback,dataType: json}); send Data to the server can be appended to the URL as a query string. If the value of the data parameter is an object (map), it will be converted to a string and URL encoded before being appended to the URL. The return data passed to the callback can be Is a JavaScript object, or an array defined in a JSON structure, and is parsed using the $.parseJSON() method.
ajax getJSON() function example
<html>
<head>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$.getJSON("这里是你的json 文件地址",function(result){
$.each(result, function(i, field){
$("p").append(field + " ");
});
});
});
});
</script>
</head>
<body>
<button>获得 JSON 数据</button>
<p></p>
</body>
</html>