ajax 处理复杂的响应结果 

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>JS</title>
    <style>
        #box{
            width:1000px;
            min-height:100px;
            padding:20px;
            border:1px solid #999;
        }
    </style>
</head>
<body>
    <h1>ajax 处理复杂的响应结果</h1>
    
    <button onclick="loadHtml()">加载</button>
    <div id="box"></div>
    <script>
        
        function loadHtml(){
            // ①实例化 XMLHttpRequest对象
            if (window.XMLHttpRequest) {
                //非IE IE7+
                var xhr = new XMLHttpRequest();
            } else {
                //IE 6
                var xhr = new ActiveXObject('Microsoft.XMLHTTP');
            }
            
            //② 给xhr 绑定事件， 检测请求的过程
            xhr.onreadystatechange = function(){
                console.log(xhr.readyState);
                //如果成功介绍到响应 
                if (xhr.status == 200 && xhr.readyState == 4) {
                     eval("var data = "+xhr.responseText);
                     //处理数据
                     makeHtml(data);
                }
            }
            
            //③ 进行请求的初始化
            xhr.open('get', '6.php', true);

            //④ 正式发送请求
            xhr.send();
        }
        
        
        //处理返回数据的函数
        function makeHtml(data){
            var table = document.createElement("table");
            table.width = 800;
            table.border =1;
            table.cellSpacing =0;
            table.cellPadding =5;
            
            //添加表头
            var tr = table.insertRow(0);
            var th = document.createElement('th');
            th.innerHTML = "id";
            tr.appendChild(th);
            var th = document.createElement('th');
            th.innerHTML = "name";
            tr.appendChild(th);
            var th = document.createElement('th');
            th.innerHTML = "sex";
            tr.appendChild(th);
            var th = document.createElement('th');
            th.innerHTML = "grade";
            tr.appendChild(th);
            
            //添加数据
            for (var i =0 ;i < data.length; i ++){
                var tr = table.insertRow(i+1);
                tr.insertCell(0).innerHTML = data[i].id;
                tr.insertCell(1).innerHTML = data[i].name;
                tr.insertCell(2).innerHTML = data[i].sex;
                tr.insertCell(3).innerHTML = data[i].grade;
            }
            
            
            //追加 table 清空原先的
            document.getElementById('box').innerHTML = "";
            document.getElementById('box').appendChild(table);
        }
    </script>
</body>
</html>

 

posted on 2016-01-17 21:46  岩_生  阅读(175)  评论(0)    收藏  举报

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