Detailed explanation of the steps to read json with jQuery-JS Tutorial-php.cn

Detailed explanation of the steps to read json with jQuery

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Release： 2018-04-23 14:24:56

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This time I will bring you a detailed explanation of the steps for jQuery to read json. What are the precautions for jQuery to read json? The following is a practical case, let's take a look.

json file is a lightweight data interaction format. Generally, it is read using the getJSON() method in jquery.

$.getJSON(url,[data],[callback])

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url: Loaded page address
data: Optional, the data sent to the server, the format is key/value
callback: Optional, the callback function executed after successful loading
1. First create a JSON format file userinfo.json to save user information. As follows:

[ 
{ 
"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. Secondly, create a page to obtain the user information data in the JSON file and display

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<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"> 
#pframe{ 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> 
<p id="pframe"> 
<p class="loadTitle"> 
<input type="button" value="获取数据" id="btn"/> 
</p> 
<p id="jsonTip"> 
</p> 
</p> 
</body> 
</html>

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Here, the editor of Script House will continue to share it with you. If you want to load AfterAutomatic loadingHow to write content (pictures and hyperlinks)

da.json

[
{ "img": "http://files.jb51.net/image/http.gif", "url":"http://www.jb51.net/1" },
{ "img": "http://files.jb51.net/image/jbzj.gif", "url":"http://www.jb51.net/2" },
{ "img": "http://files.jb51.net/image/tengxunyun.jpg", "url":"http://www.jb51.net/3" }
]

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Implementation code for obtaining json data through ajax

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<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>
<p id="ok"></p>
<script>
$(function () {
    $.ajax({
      type: "POST",
      dataType: "json",
      url: "da.json",
      success: function (result) {
        var str = "";
				$.each(result,function(index,obj){				
				str += "<a href=&#39;" + obj["url"] + "&#39; target=&#39;_blank&#39;><img src=&#39;" + obj["img"] + "&#39; /></a>";					
				});
        $("#ok").append(str);
      }
    });
});
</script>
</body>
</html>

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Passed $.getJSON gets the json code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<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>
<p id="ok"></p>
<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=&#39;" + info["url"] + "&#39; target=&#39;_blank&#39;><img src=&#39;" + info["img"] + "&#39; /></a>";
}) 
$jsontip.html(strHtml);//显示处理后的数据 
}) 
}) 
</script>
</body>
</html>

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The effect will come out as shown in the figure below, which means the code is OK

I believe you have read the case in this article After mastering the method, please pay attention to other related articles on the php Chinese website for more exciting content!