How jQuery+ajax implements traversal of json data-JS Tutorial-php.cn

How jQuery+ajax implements traversal of json data

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Release： 2018-04-04 11:45:01

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This time I will bring you jQuery+ajax how to implement json data traversal, what are the precautions for jQuery+ajax to implement json data traversal, the following is a practical case, one Get up and take a look.

Let me tell you my needs first: after making an ajax request, the following json data is passed back in the background.

The specific implementation code is as follows:

JavaScriptCode

{ 
"data":[ 
{"id":"1","name":"选择A","value":"A"}, 
{"id":"2","name":"选择B","value":"B"}, 
{"id":"3","name":"选择C","value":"C"} 
] 
}

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The above json data class is parsed in the success function of jquery

JavaScript code

$.ajax({ 
type: "POST", 
url: "xxx.do", 
dataType : "json", // 指定返回类型 
data: {xxx:"yyy"}, // 传递到后台的参数 
success: function(data) 
{ 
$.each(data, function(index,values){ // 解析出data对应的Object数组 
$.each(values,function(index2,value){ // 遍历Object数组 ，每个对象的值存放在value ，index2表示为第几个对象 
// 根据自己的逻辑进行数据的处理 
alert(value.name + " " + value.value); 
// TODO: 逻辑 
}); 
}); 
}, 
error : function() 
{ 
alert("系统出现问题"); 
} 
});

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Continue with an example

This chapter shares a code example, which is jQuery encapsulated ajax request processing for JSON data.
The code is relatively simple and can be skimmed by experienced personnel. Beginners can use it as a reference.
The code is as follows:

<!DOCTYPE html> 
<html> 
<head> 
<meta charset=" utf-8"> 
<title>脚本之家</title> 
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script>
$(document).ready(function(){
 $("#bt").click(function(){
  $.ajax({
   type: "get",
   dataType: "json",
   url: "demo/jQuery/ajax/txt/json.txt",
   success: function(msg){
    var data = msg
    str="";
    $.each(data,function(index, n){
     str=str+data[index].webName+","+data[index].url+","+data[index].age+"<br/>";
    });
    $("#show").html(str);
   }
  });
 })
})
</script>
</head>
<body>
<p id="show"></p>
<input type="button" id="bt" value="查看效果"/>
</body>
</html>

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!