Backend Development
XML/RSS Tutorial
Detailed explanation of JS parsing XML files and XML strings
Detailed explanation of JS parsing XML files and XML strings
JS parses XML files
<script type='text/javascript'>
loadXML = function(xmlFile){
var xmlDoc=null;
//判断浏览器的类型
//支持IE浏览器
if(!window.DOMParser && window.ActiveXObject){
var xmlDomVersions = ['MSXML.2.DOMDocument.6.0','MSXML.2.DOMDocument.3.0','Microsoft.XMLDOM'];
for(var i=0;i<xmlDomVersions.length;i++){
try{
xmlDoc = new ActiveXObject(xmlDomVersions[i]);
break;
}catch(e){
}
}
}
//支持Mozilla浏览器
else if(document.implementation && document.implementation.createDocument){
try{
/* document.implementation.createDocument('','',null); 方法的三个参数说明
* 第一个参数是包含文档所使用的命名空间URI的字符串;
* 第二个参数是包含文档根元素名称的字符串;
* 第三个参数是要创建的文档类型(也称为doctype)
*/
xmlDoc = document.implementation.createDocument('','',null);
}catch(e){
}
}
else{
return null;
}
if(xmlDoc!=null){
xmlDoc.async = false;
xmlDoc.load(xmlFile);
}
return xmlDoc;
}
</script>JS parses XML strings
<script type='text/javascript'>
loadXML = function(xmlString){
var xmlDoc=null;
//判断浏览器的类型
//支持IE浏览器
if(!window.DOMParser && window.ActiveXObject){ //window.DOMParser 判断是否是非ie浏览器
var xmlDomVersions = ['MSXML.2.DOMDocument.6.0','MSXML.2.DOMDocument.3.0','Microsoft.XMLDOM'];
for(var i=0;i<xmlDomVersions.length;i++){
try{
xmlDoc = new ActiveXObject(xmlDomVersions[i]);
xmlDoc.async = false;
xmlDoc.loadXML(xmlString); //loadXML方法载入xml字符串
break;
}catch(e){
}
}
}
//支持Mozilla浏览器
else if(window.DOMParser && document.implementation && document.implementation.createDocument){
try{
/* DOMParser 对象解析 XML 文本并返回一个 XML Document 对象。
* 要使用 DOMParser,使用不带参数的构造函数来实例化它,然后调用其 parseFromString() 方法
* parseFromString(text, contentType) 参数text:要解析的 XML 标记 参数contentType文本的内容类型
* 可能是 "text/xml" 、"application/xml" 或 "application/xhtml+xml" 中的一个。注意,不支持 "text/html"。
*/
domParser = new DOMParser();
xmlDoc = domParser.parseFromString(xmlString, 'text/xml');
}catch(e){
}
}
else{
return null;
}
return xmlDoc;
}
</script>Testing XML
<?xml version="1.0" encoding="utf-8" ?> <DongFang> <Company> <cNname>1</cNname> <cIP>1</cIP> </Company> <Company> <cNname>2</cNname> <cIP>2</cIP> </Company> <Company> <cNname>3</cNname> <cIP>3</cIP> </Company> <Company> <cNname>4</cNname> <cIP>4</cIP> </Company> <Company> <cNname>5</cNname> <cIP>5</cIP> </Company> <Company> <cNname>6</cNname> <cIP>6</cIP> </Company> </DongFang>
How to use
var xmldoc=loadXML(text.xml)
var elements = xmlDoc.getElementsByTagName("Company");
for (var i = 0; i < elements.length; i++) {
var name = elements[i].getElementsByTagName("cNname")[0].firstChild.nodeValue;
var ip = elements[i].getElementsByTagName("cIP")[0].firstChild.nodeValue;
}The above method is suitable for IE. Let’s discuss the problem of parsing XML under IE and Firefox browser
I have parsed XML documents and XML strings for IE and Firefox respectively. All codes have been commented out. If you want to see which part of the function, just remove the comments.
<script>
//解析xml文档/////////////////////////////////////////////////////
var xmlDoc=null;
//支持IE浏览器
if(window.ActiveXObject){
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
}
//支持Mozilla浏览器
else if(document.implementation && document.implementation.createDocument){
xmlDoc = document.implementation.createDocument('','',null);
}
else{
alert("here");
}
if(xmlDoc!=null){
xmlDoc.async = false;
xmlDoc.load("house.xml");
}
//ie和火狐不仅解析器不一样,解析过程也不一样。如下;
//ie解析xml文档
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[0].childNodes[0].childNodes[0].nodeValue);//弹出150万
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[0].childNodes[1].childNodes[0].nodeValue);//弹出一室三居
//层层遍历解析childNodes[1]
//alert(xmlDoc.childNodes[1].childNodes[1].childNodes[0].childNodes[0].nodeValue);//弹出200万
//alert(xmlDoc.childNodes[1].childNodes[0].childNodes[0].childNodes[0].nodeValue);//弹出150万
//alert(xmlDoc.childNodes[1].childNodes[0].childNodes[1].childNodes[0].nodeValue);//弹出一室三居
//还可以用item(i)进行遍历
//var nodes=xmlDoc.documentElement.childNodes;
//alert(nodes.item(0).childNodes.item(0).childNodes.item(0).text); //弹出150万
//alert(nodes.item(0).childNodes.item(1).childNodes.item(0).text); //弹出一室三居
//火狐解析xml文档
//火狐浏览器和ie解析xml不一样节点的值用textContent。
//并且他会在有的层次child节点前后都加上"\n"换行符。(这个搞不清楚为什么,用firebug调试的时候就是这个样子,所以写过的代码最好测试一下,换个环境就不对了)
//也就是说第1个节点是"\n",第2个节点才是真正的第一个节点。
//第3个节点是"\n",第4个节点才是真正的第二个节点。
//层层获取解析childNodes[0]
//alert(xmlDoc.childNodes[0].childNodes[1].childNodes[1].textContent);//弹出150万
//alert(xmlDoc.childNodes[0].childNodes[1].childNodes[3].textContent);//弹出一室三居
//直接获取节点名解析getElementsByTagName("address")
//alert(xmlDoc.getElementsByTagName("address")[0].textContent);//弹出150万 一室三居 200万 300万
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[1].textContent);//弹出150万 一室三居
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[1].childNodes[1].textContent);//弹出150万
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[1].childNodes[3].textContent);//弹出一室三居
//alert(xmlDoc.getElementsByTagName("address")[0].childNodes[3].textContent);//弹出200万
//火狐也可以用item(1)函数遍历,注意也是有的层次节点前后都加了节点"\n"。
//第一个节点是item(1),第二个节点是item(3),第三个节点是item(5)
//item(1)函数遍历解析
//var nodes=xmlDoc.documentElement.childNodes;
//alert(nodes.item(1).textContent); //弹出150万 一室三居
//alert(nodes.item(1).childNodes.item(1).textContent); //弹出150万
//alert(nodes.item(1).childNodes.item(3).textContent); //一室三居
//解析xml字符串/////////////////////////////////////////////////////////////////////////
var str="<car>"+
"<brand><price>50万</price><pattern>A6</pattern></brand>"+
"<brand><price>65万</price><pattern>A8</pattern></brand>"+
"<brand><price>17万</price></brand>"+
"</car>";
//跨浏览器,ie和火狐解析xml使用的解析器是不一样的。
var xmlStrDoc=null;
if (window.DOMParser){// Mozilla Explorer
parser=new DOMParser();
xmlStrDoc=parser.parseFromString(str,"text/xml");
}else{// Internet Explorer
xmlStrDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlStrDoc.async="false";
xmlStrDoc.loadXML(str);
}
//ie解析xml字符串
//alert(xmlStrDoc.getElementsByTagName("car")[0].childNodes[0].childNodes[0].childNodes[0].nodeValue);//弹出50万
//alert(xmlStrDoc.getElementsByTagName("car")[0].childNodes[0].childNodes[1].childNodes[0].nodeValue);//弹出A6
//还可以用item(i)进行遍历
//var strNodes=xmlStrDoc.documentElement.childNodes;
//alert(strNodes.item(0).childNodes.item(0).childNodes.item(0).text); //弹出50万
//alert(strNodes.item(0).childNodes.item(1).childNodes.item(0).text); //弹出A6
//火狐解析xml字符串
//火狐浏览器和ie解析xml不一样节点的值用textContent。
//并且他会在有的层次child节点前后都加上"\n"换行符。
//也就是说第1个节点是"\n",第2个节点才是真正的第一个节点。
//第3个节点是"\n",第4个节点才是真正的第二个节点。
//alert(xmlStrDoc.childNodes[0].childNodes[1].textContent);//弹出65万 A8
//alert(xmlStrDoc.childNodes[0].childNodes[1].childNodes[1].textContent);//A8
//alert(xmlStrDoc.childNodes[0].childNodes[1].childNodes[0].textContent);//弹出65万
//火狐也可以用item(1)函数遍历,注意也是有的层次节点前后都加了节点"\n"。
//第一个节点是item(1),第二个节点是item(3),第三个节点是item(5)
//var nodes=xmlStrDoc.documentElement.childNodes;
//alert(nodes.item(1).textContent); //弹出65万 A8
//alert(nodes.item(1).childNodes.item(0).textContent); //弹出65万
//alert(nodes.item(1).childNodes.item(1).textContent); //弹出A8
</script> Among them, the level of each node in xml is the most annoying problem. You can only try it again and again. As long as the correct one comes out, you can easily determine the hierarchical relationship of the nodes, or debug it.
I feel that json is better to read and understand in this regard. This analysis is too laborious!
<?xml version="1.0" encoding="utf-8" ?>
<address>
<city name="北京">
<price>150万</price>
<type>一室三居</type>
</city>
<city name="上海">
<price>200万 </price>
</city>
<city name="杭州">
<price>230万</price>
</city>
<city name="南京"></city>
</address>
Hot AI Tools
Undress AI Tool
Undress images for free
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undresser.AI Undress
AI-powered app for creating realistic nude photos
ArtGPT
AI image generator for creative art from text prompts.
Stock Market GPT
AI powered investment research for smarter decisions
Hot Article
Popular tool
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
20450
7
13593
4
How to parse XML in Ruby on Rails? (Web Frameworks)
Jan 05, 2026 am 12:53 AM
UseNokogiriforfast,robustXMLparsinginRails:installviagem'nokogiri',parsewithNokogiri::XML,handleencoding/namespacesexplicitly,andextractdatasafelyusingcss()/xpath()whilecheckingdoc.errorsand.textguards.
How to compare two XML files and find differences
Jan 05, 2026 am 01:05 AM
Use tools or programming methods to compare XML file differences: first use online tools (such as xmlcompare.org) or IDE plug-ins for visual comparison, and then implement automated analysis through the command line (such as xmllint diff) or Python scripts (using the lxml library to parse and standardize XML). Pay attention to the processing of whitespace characters, attribute order, namespace prefixes and other influencing factors. It is recommended to use CanonicalXML to eliminate format differences.
How to fix XML encoding issues (UTF-8)? (Character Sets)
Jan 03, 2026 am 02:48 AM
XMLshowsgarbledtextwhendeclaredUTF-8encodingmismatchesactualbyteencoding;verifywithfile-iorxxd,fixbyresavingcorrectly,andparseinbinarymodetohonortheXMLdeclaration.
How to manage dependencies with a pom.xml in Maven
Jan 03, 2026 am 01:42 AM
The pom.xml file declares dependencies through groupId, artifactId and version, and can use scope to specify the scope; 2. Multi-module projects use dependencyManagement to unify versions; 3. Maven automatically handles transitive dependencies, and exclusions can be used to exclude conflicting libraries; 4. Use MavenVersionsPlugin to check dependency updates to keep projects safe and consistent.
How to serialize C# objects to XML? (Data Persistence)
Jan 04, 2026 am 01:41 AM
XmlSerializerisidealforsimple,attribute-drivenXMLserializationinC#,requiringpublicproperties,parameterlessconstructors,andconcretetypes;itignores[Serializable],supportsListbutnotDictionary,lackscircularreferencehandling,andneedsexplicitnull/namespace
How to validate XML against multiple XSDs? (Schema Inclusion)
Jan 06, 2026 am 03:28 AM
XMLparsersrequireasinglemainXSDthatuses(samenamespace)or(differentnamespace)toreferenceothers;xsi:schemaLocationinXMLonlyhintsatschemalocationsbutdoesn’tauto-composeschemas.
How to delete specific nodes from XML in Java? (DOM Manipulation)
Jan 07, 2026 am 12:14 AM
To delete a specific node, you need to operate based on the tag name and conditions (such as attribute values or text content): the liveNodeList must be traversed in reverse order and removeChild() is called; XPath is recommended for complex conditions; be sure to check that the parent node is not empty before deleting to avoid NPE; performance and memory limitations should be considered for large-scale deletions.
How to use XSLT to transform XML to HTML? (Web Styling)
Jan 09, 2026 am 12:34 AM
Modern browsers have deprecated XSLT support and require the use of external processors such as xsltproc, saxon-js or lxml; the XSLT1.0 style sheet must declare the namespace and version="1.0"; it is invalid in Chrome/Firefox;




