json文件是一种轻量级的数据交互格式。一般在jquery中使用getJSON()方法读取。
$.getJSON(url,[data],[callback])
url:加载的页面地址
data: 可选项,发送到服务器的数据,格式是key/value
callback:可选项,加载成功后执行的回调函数
1.首先建一个JSON格式的文件userinfo.json 保存用户信息。如下:
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[ { "name" : "张国立" , "sex" : "男" , "email" : "zhangguoli@123.com" }, { "name" : "张铁林" , "sex" : "男" , "email" : "zhangtieli@123.com" }, { "name" : "邓婕" , "sex" : "女" , "email" : "zhenjie@123.com" } ] |
2.其次建一个页面用于获取JSON文件里的用户信息数据,并显示
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> < head > < meta http-equiv = "Content-Type" content = "text/html; charset=utf-8" /> < title >getJSON获取数据</ title > < script type = "text/javascript" src = "js/jquery-1.8.2.min.js" ></ script > < style type = "text/css" > #divframe{ border:1px solid #999; width:500px; margin:0 auto;} .loadTitle{ background:#CCC; height:30px;} </ style > < script type = "text/javascript" > $(function (){ $("#btn").click(function () { $.getJSON("js/userinfo.json", function (data){ var $jsontip = $("#jsonTip"); var strHtml = "123"; //存储数据的变量 $jsontip.empty(); //清空内容 $.each(data, function (infoIndex, info){ strHtml += "姓名:" + info["name"] + "< br >"; strHtml += "性别:" + info["sex"] + "< br >"; strHtml += "邮箱:" + info["email"] + "< br >"; strHtml += "< hr >" }) $jsontip.html(strHtml); //显示处理后的数据 }) }) }) </ script > </ head > < body > < div id = "divframe" > < div class = "loadTitle" > < input type = "button" value = "获取数据" id = "btn" /> </ div > < div id = "jsonTip" > </ div > </ div > </ body > </ html > |
da.json
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[ ] |
通过ajax获取json数据的实现代码
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <head> <meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" /> <title>通过ajax获取json数据的实现代码</title> <script type= "text/javascript" src= "//www.jb51.net/jslib/jquery/jquery.min.js" ></script> </head> <body> <div id= "ok" ></div> <script> $( function () { $.ajax({ type: "POST" , dataType: "json" , url: "da.json" , success: function (result) { var str = "" ; $.each(result, function (index,obj){ str += "<a href=\'" + obj[ "url" ] + "\' target=\'_blank\'><img src=\'" + obj[ "img" ] + "\' /></a>" ; }); $( "#ok" ).append(str); } }); }); </script> </body> </html> |
通过$.getJSON获取json的代码
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <head> <meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" /> <title>通过$.getJSON获取json的代码</title> <script type= "text/javascript" src= "//www.jb51.net/jslib/jquery/jquery.min.js" ></script> </head> <body> <div id= "ok" ></div> <script> $( function (){ $.getJSON( "da.json" , function (data){ var $jsontip = $( "#ok" ); var strHtml = "" ; //存储数据的变量 $jsontip.empty(); //清空内容 $.each(data, function (infoIndex,info){ strHtml += "<a href=\'" + info[ "url" ] + "\' target=\'_blank\'><img src=\'" + info[ "img" ] + "\' /></a>" ; }) $jsontip.html(strHtml); //显示处理后的数据 }) }) </script> </body> </html> |