AJAX 学习笔记之AJAX 对服务器返回的XML的处理

假设服务器返回的XML 文档，如下所示：

代码如下

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<?xml version="1.0" encoding="gb2312"?>
<list>
    <caption>Member List</caption>
    <member>
        <name>isaac</name>
        <class>W13</class>
        <birth>Jun 24th</birth>
        <constell>Cancer</constell>
        <mobile>1118159</mobile>
    </member>
    <member>
        <name>fresheggs</name>
        <class>W610</class>
        <birth>Nov 5th</birth>
        <constell>Scorpio</constell>
        <mobile>1038818</mobile>
    </member>
    <member>
        <name>girlwing</name>
        <class>W210</class>
        <birth>Sep 16th</birth>
        <constell>Virgo</constell>
        <mobile>1307994</mobile>
    </member>
    <member>
        <name>tastestory</name>
        <class>W15</class>
        <birth>Nov 29th</birth>
        <constell>Sagittarius</constell>
        <mobile>1095245</mobile>
    </member>
    <member>
        <name>lovehate</name>
        <class>W47</class>
        <birth>Sep 5th</birth>
        <constell>Virgo</constell>
        <mobile>6098017</mobile>
    </member>
    <member>
        <name>slepox</name>
        <class>W19</class>
        <birth>Nov 18th</birth>
        <constell>Scorpio</constell>
        <mobile>0658635</mobile>
    </member>
    <member>
        <name>smartlau</name>
        <class>W19</class>
        <birth>Dec 30th</birth>
        <constell>Capricorn</constell>
        <mobile>0006621</mobile>
    </member>
    <member>
        <name>tuonene</name>
        <class>W210</class>
        <birth>Nov 26th</birth>
        <constell>Sagittarius</constell>
        <mobile>0091704</mobile>
    </member>
    <member>
        <name>dovecho</name>
        <class>W19</class>
        <birth>Dec 9th</birth>
        <constell>Sagittarius</constell>
        <mobile>1892013</mobile>
    </member>
    <member>
        <name>shanghen</name>
        <class>W42</class>
        <birth>May 24th</birth>
        <constell>Gemini</constell>
        <mobile>1544254</mobile>
    </member>
    <member>
        <name>venessawj</name>
        <class>W45</class>
        <birth>Apr 1st</birth>
        <constell>Aries</constell>
        <mobile>1523753</mobile>
    </member>
    <member>
        <name>lightyear</name>
        <class>W311</class>
        <birth>Mar 23th</birth>
        <constell>Aries</constell>
        <mobile>1002908</mobile>
    </member>
</list>

客户端获得服务器端的该XML 数据，并将其显示在表格中。代码如下：

代码如下

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>responseXML</title>
<style>

</style>
<script language="javascript">
var xmlHttp;
function createXMLHttpRequest(){
    if(window.ActiveXObject)
        xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
    else if(window.XMLHttpRequest)
        xmlHttp = new XMLHttpRequest();
}
function getXML(addressXML){
    var url = addressXML + "?timestamp=" + new Date();
    createXMLHttpRequest();
    xmlHttp.onreadystatechange = handleStateChange;
    xmlHttp.open("GET",url);
    xmlHttp.send(null);
}
function addTableRow(sName, sClass, sBirth, sConstell, sMobile){
    //表格添加一行的相关操作，可参看7.2.1节
    var oTable = document.getElementById("member");
    var oTr = oTable.insertRow(oTable.rows.length);
    var aText = new Array();
    aText[0] = document.createTextNode(sName);
    aText[1] = document.createTextNode(sClass);
    aText[2] = document.createTextNode(sBirth);
    aText[3] = document.createTextNode(sConstell);
    aText[4] = document.createTextNode(sMobile);
    for(var i=0;i<aText.length;i++){
        var oTd = oTr.insertCell(i);
        oTd.appendChild(aText[i]);
    }
}
function DrawTable(myXML){
    //用DOM方法操作XML文档
    var oMembers = myXML.getElementsByTagName("member");
    var oMember = "", sName = "", sClass = "", sBirth = "", sConstell = "", sMobile = "";
    for(var i=0;i<oMembers.length;i++){
        oMember = oMembers[i];
        sName = oMember.getElementsByTagName("name")[0].firstChild.nodeValue;
        sClass = oMember.getElementsByTagName("class")[0].firstChild.nodeValue;
        sBirth = oMember.getElementsByTagName("birth")[0].firstChild.nodeValue;
        sConstell = oMember.getElementsByTagName("constell")[0].firstChild.nodeValue;
        sMobile = oMember.getElementsByTagName("mobile")[0].firstChild.nodeValue;
        //添加一行
        addTableRow(sName, sClass, sBirth, sConstell, sMobile);
    }
}
function handleStateChange(){
    if(xmlHttp.readyState == 4 && xmlHttp.status == 200)
        DrawTable(xmlHttp.responseXML);    //responseXML获取到XML文档
}
</script>
</head>

<body>
<input type="button" value="获取XML" onclick="getXML('9-4.xml');"><br><br>
<table class="datalist" summary="list of members in EE Studay" id="member">
    <tr>
        <th scope="col">Name</th>
        <th scope="col">Class</th>
        <th scope="col">Birthday</th>
        <th scope="col">Constellation</th>
        <th scope="col">Mobile</th>
    </tr>
</table>
</body>
</html>

我们可以看到，在客户端获得XML 文件的代码如下：

代码如下	复制代码
<input type="button" value="获取XML" onclick="getXML('9-4.xml');">

也就是说，是直接取得XML 数据的。而实际开发中返回XML 数据的工作是通过服务器端（如：ASP.NET、JSP等）的代码动态生成的。换句话说，getXML('...') 中的文件地址应该是.aspx 或.jsp等动态页面的后缀。

使用jQuery 框架实现

如果在客户端使用jQuery 框架，实现AJAX 获得服务器端的XML数据。

代码如下：

代码如下

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<html>
<head>
<title> demo </title>
<meta name="Author" content="xugang" />
<script language="javascript" src="jquery.min.js"></script>
<script type="text/javascript">
function getXML(addressXML){
    //使用jquery的ajax方法
    $.ajax({
       type:"GET",
       url:addressXML,
       dataType:"xml", //返回类型(区分大小写)
       success:function(myXML){
         //each 遍历每个<member>标记
         $(myXML).find("member").each(
            function(){
              var oMember="",sName="",sClass="",sBirth="",sConstell="",sMobile="";
              sName = $(this).find("name").text();
              sClass = $(this).find("class").text();
              sBirth = $(this).find("birth").text();
              sConstell = $(this).find("constell").text();
              sMobile = $(this).find("mobile").text();
              //添加行
              $("#member").append($("<tr><td>"+sName
                 +"</td><td>" + sClass
                 +"</td><td>" + sBirth
                 +"</td><td>" + sConstell
                 +"</td><td>" + sMobile +"</td></tr>"));
            }
         )
       }
    })
}
</script>
</head>
<body>
<input type="button" value="获取XML" onclick="getXML('9-4.xml');">
<br/>
<TABLE class="datalist" id="member">
<TR>
    <TH scope="col">Name</TH>
    <TH scope="col">Class</TH>
    <TH scope="col">Birthday</TH>
    <TH scope="col">Constellation</TH>
    <TH scope="col">Mobile</TH>
</TR>
</TABLE>
</body>
</html>

服务器端传递XML 数据的方式不变

补充：网页制作,js教程