Callback Description of the $.getjson () method

The $.getjson () method crosses the domain to get the JSON object of the server, the suffix of the URL finally takes a "callback=?" Parameters as a successful callback function, such as:

JS Code

2. var url = "${bipjs}/intf/accountsofrefuseemail.jsp?act=add&siteid=${lang.siteid}&accountid=${loginid} &callback=? ";
4. $.getjson (URL, {}, function (data) {
6. var code = Data.code;
8. if (code = = 0) {
10. $ (' #floatOne '). Myfadein ();
12. }
14. });

The data returned is a JSON object, and accordingly, the server returns the string to be of this style:

Java code

1. String callback = T.stringvalue (Getrequestparams (Request,"callback"), "");
3. Jsonobject Jo = new Jsonobject ();
5. Put Key/value in Jo
7. Out.print (callback + "(" + Jo + ")");

Principle: jquery automatically generates a callback=jsonp*** string when parsing the request callback=, which jsonp*** as a method at the time of the successful callback and is automatically executed by Jquey. The parameter is a JSON-formatted string (here is data). Accordingly, the string returned by the server is in this form: jsonp*** (jsonobject).

Such as: Just above the URL is jquey parsed into:

1. Request url:http://localhost.pcauto.com.cn:12385/intf/accountsofrefuseemail.jsp?act=add&siteid=2& accountid=388&callback=jsonp1381976698163&_=1381976708919

The string form returned by the server:

jsonp1381976698163 ({"code":0,"msg":"Increase user Success"})

The jquery callback method jsonp1381976698163 (JSONSTR) is to convert the string jsonstr to a Josn object, and here is the JSON object converted to data.

Callback Description of the $.getjson () method