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"
}
]
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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
>
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da.json
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[
]
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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>"
;
});
$(
"#ok"
).append(str);
}
});
});
</script>
</body>
</html>
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通过$.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>
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