JavaScript XML操作 封装类

function XMLObject() 
{ 
this.isIE=true; 
if (window.ActiveXObject){isIE=true;}else{isIE=false;} 
var node_xml; 
var xmlDoc; 
if (isIE){ 
xmlDoc = new ActiveXObject("Msxml2.DOMDocument"); 
} 
else{ 
if (document.implementation && document.implementation.createDocument){ 
xmlDoc = document.implementation.createDocument("","",null); 
} 
} 
xmlDoc.async = false; 
xmlDoc.resolveExternals = false; 
xmlDoc.validateOnParse = false; 
xmlDoc.preserveWhiteSpace = true; 
//从字符串创建XML对象(XML字符串) 
this.LoadXMLForString=function(XMLStr) 
{ 
if(isIE) 
{ 
xmlDoc.loadXML(XMLStr); 
} 
else 
{ 
var oParser = new DOMParser(); 
xmlDoc = oParser.parseFromString(XMLStr,"text/xml"); 
} 
} 
//从外部文件创建XML文件(文件路径) 
this.getXMLForURL=function(url) 
{ 
//xmlDoc.load(url); 
if (isIE){ 
xmlDoc.load(url); 
} 
else 
{ 
xmlDoc = getXML(url).responseXML; 
} 
} 
//获得节点字节点 
this.getXMLArray=function (name) { 
var keys = name.split('.'); 
var node = xmlDoc.documentElement; // 得到根节点 
var rtn = new Array(); 
var n = 0; 
for(var i=0; i<keys.length; i++) { 
var childs = node.childNodes; // 得到子节点 
var key = keys[i]; 
for(var k=0; k<childs.length; k++) { 
var child = childs[k]; 
if(child.nodeName == key) { // 判断子节点是否符合 
if(i == keys.length-1) { 
rtn[n] = child; 
n++; 
} else { 
node = child; 
break; 
} 
} 
} 
} 
node_xml=rtn; 
return rtn; 
} 
//获得节点内容 
this.getNodeValue=function(name) 
{ 
return this.getValue(xmlDoc,name); 
} 
//根据节点获得节点下子节点内容 
this.getValue=function(node, name) 
{ 
var keys = name.split('.'); 
for(var i=0; i<keys.length; i++) 
{ 
var childs = node.childNodes; // 得到子节点 
var key = keys[i]; 
for(var k=0; k<childs.length; k++) 
{ 
var child = childs[k]; 
if(child.nodeName == key) 
{ // 判断子节点是否符合 
if(child.childNodes.length == 1) 
{ 
// 如果没有字节点,返回值 
if(!window.ActiveXObject) 
{ 
return childs[k].textContent; 
} 
else 
{ 
return childs[k].text 
} 
} 
else 
{ 
// 还有子节点,继续分析 
node = child; 
break; 
} 
} 
} 
} 
return ""; 
} 
function GetXMLHTTP() 
{ 
var xmlhttp; 
if (window.ActiveXObject){ 
try{xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");} 
catch (e){xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");} 
}else if (window.XMLHttpRequest) 
{xmlhttp=new XMLHttpRequest();} 
return xmlhttp; 
} 
function getXML(url){ 
var xmlHttp=GetXMLHTTP(); 
if (xmlHttp!=null){ 
xmlHttp.open("GET",url,false); 
xmlHttp.send(null); 
}else{ 
alert("Your browser does not support XMLHTTP.11"); 
return false; 
} 
return xmlHttp; 
} 
}

调用方法DEMO

var strXML="<?xml version='1.0' encoding='utf-8'?><ekuy><user><name><cnname>小猪</cnname></name><age>27</age></user><user><name><cnname>小霞</cnname></name><age>26</age></user><user><name><cnname>小章</cnname></name><age>25</age></user></ekuy>"; var XMLObj=new XMLObject(); 
XMLObj.LoadXMLForString(strXML) 
//XMLObj.getXMLForURL("test.xml"); 
var list = XMLObj.getXMLArray( 'user');//获得节点 
document.write(XMLObj.getNodeValue('ekuy.user.name.cnname'));//直接获得节点内容 
//循环节点获得节点下子节点内容 
for(var i=0; i<list.length; i++) { 
var obj = list[i]; 
document.write(XMLObj.getValue(obj, 'name.cnname')); 
document.write(XMLObj.getValue(obj, 'age')); 
document.write('<br\/>'); 
}

呵呵 写的不怎样 大家见笑 非常简单的功能