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原生ajax练习-post&xml

2024-09-08 22:22:41   217人阅读

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<style>
    h2 {color: #555; }
    .p1 {color: #f99; }
    .p2 {color: #9f9; }
    .p3 {color: #99f; }



</style>
<ul id="ul">
    <li>
        <p class="p4"></p>
        <h2></h2>
        <p class="p1"></p>
        <p class="p2"></p>
        <p class="p3"></p>
    </li>
</ul>
</body>
</html>
<script>
    window.onload = function() {
        var xhr = null;
        if(window.XMLHttpRequest){
            xhr = new XMLHttpRequest();
        }else{
            xhr = new ActiveXObject(‘Microsoft.XMLHTTP‘);
        }

        var url = ‘xml/1.xml?‘;
        var para = ‘?_t=‘+new Date().getTime();//传递到send()当中去，不会有缓存


        // xhr.setRequestHeader(‘Content-Type‘,‘application/x-form-www-urlencoded‘)
        // Failed to execute ‘setRequestHeader‘ on ‘XMLHttpRequest‘: The object‘s state must be OPENED.
        
        
        xhr.open(‘post‘,url,true);//url中不再包含参数
        xhr.setRequestHeader(‘Content-Type‘,‘application/x-form-www-urlencoded‘)//必须位于open之后，send之前
        xhr.send(para);
        xhr.onreadystatechange = function () {
            if(xhr.readyState == 4 && xhr.status == 200 ) {
                //得到的XML是一个对象,这个对象有各种属性和方法
                var data = xhr.responseXML;
                var NOVEL = data.getElementsByTagName(‘NOVEL‘)[0];
                var books = NOVEL.getElementsByTagName(‘book‘);
                var len = books.length;
                //console.log(NOVEL);
                var str = ‘‘;
                for(var i=0;i<len;i++) {
                    str+= ‘<li><h2>‘+getNodeText(books[i].getElementsByTagName(‘name‘)[0])+‘</h2>‘;
                    str+= ‘<p class="p4">‘+getNodeText(books[i].getElementsByTagName(‘author‘)[0])+‘</p>‘;
                    str+= ‘<p class="p2">‘+getNodeText(books[i].getElementsByTagName(‘publish_time‘)[0])+‘</p>‘;
                    str+= ‘<p class="p3">‘+getNodeText(books[i].getElementsByTagName(‘publish_time‘)[0])+‘</p>‘;
                    str+= ‘<p class="p1">‘+getNodeText(books[i].getElementsByTagName(‘publish_time‘)[0])+‘</p></li>‘;
                }
                document.getElementById(‘ul‘).innerHTML = str;
            }
        }

        function getNodeText(node){
            if(window.ActiveXObject){//IE
                return node.text;
            }else{//标准浏览器
                if(node.nodeType == 1){
                    return node.textContent;
                }
            }
        }

    }
</script>

 

<?xml version="1.0" encoding="utf-8"?>
<bookstore>
    <NOVEL>
        <book>
            <name>Herry Porter</name>
            <author>J.K Rolling</author>
            <publish_time>2058</publish_time>
        </book>
        <book>
            <name>三国演义</name>
            <author>罗贯中</author>
            <publish_time>1984</publish_time>
        </book>
        <book>
            <name>水浒传</name>
            <author>施耐庵</author>
            <publish_time>2501</publish_time>
        </book>
        <book>
            <name>红楼梦</name>
            <author>高雪琴</author>
            <publish_time>1865</publish_time>
        </book>
    </NOVEL>
    <MATH>
        <book>
            <name>圆周率</name>
            <author>猪无能</author>
            <publish_time>1869</publish_time>
        </book>
        <book>
            <name>勾股定理</name>
            <author>沙悟净</author>
            <publish_time>1875</publish_time>
        </book>
        <book>
            <name>相对论</name>
            <author>唐玄奘</author>
            <publish_time>1886</publish_time>
        </book>
    </MATH>
</bookstore>

　　

原生ajax练习-post&xml


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