<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>标题</title>
<meta name="keywords" content="">
<meta name="description" content="">
<style>
*{margin:0; padding:0; list-style:none;}
</style>
</head>
<body>
<button id="btn">请求数据</button>
<ul id="list"></ul>
<script>
var btn=document.getElementById('btn');
var list=document.getElementById('list');
btn.onclick=function (){
// 1.创建XMLHttpRequest对象
var xhr=null;
if (window.XMLHttpRequest) {// 非IE5/6
xhr=new XMLHttpRequest();//实例对象
} else{// IE5/6
xhr=new ActiveXObject('Microsoft.XMLHTTP');
};
// 2.打开与服务器的链接
xhr.open('get','test3.json?_='+new Date().getTime(),true);//生成不一样的url解决缓存问题
// 3.发送给服务器
xhr.send(null);//get请求
// 4.响应就绪
xhr.onreadystatechange=function (){
if (xhr.readyState==4) {//请求完成
if (xhr.status==200) {//ok
var json=JSON.parse(xhr.responseText);//解析成json对象
for (var i = 0; i < json.length; i++) {
list.innerHTML+='<li>姓名:'+json[i].name+'， 性别:'+json[i].sex+'， 年龄:'+json[i].age+'， 成绩:'+json[i].score+'</li>';
};
} else{
alert(xhr.status);
};
};
}
}
</script>
</body>
</html>
[
{"name":"老王","sex":"女","age":19,"score":66},
{"name":"老刘","sex":"男","age":22,"score":72},
{"name":"老李","sex":"女","age":24,"score":85},
{"name":"老张","sex":"男","age":30,"score":96}
]