javascript-处理XML

 /**
  * Created by Administrator on 2015/4/4.
  */

 var XmlUtil=(function () {
     var createDocument= function () {
         if(typeof arguments.callee.activeXString !='string'){
             var versions=['MSXML2.DOMDocument.6.0','MSXML2.DOMDocument.3.0','MSXML2.DOMDocument'],
                 i,len;
             for(i=0,len=versions.length;i<len;i++){
                 try{
                     new ActiveXObject(versions[i]);
                     arguments.callee.activeXString=versions[i];
                     break;
                 }catch (e){
                     //跳过
                 }
             }
         }
         return new ActiveXObject(arguments.callee.activeXString);
     };
     return {
         //把xml字符串序列化成XMLDOM对象
         parseXML:function(xml){
             var xmldom=null;
             if(DOMParser != 'undefined'){
                 var domparser=new DOMParser();
                 xmldom= domparser.parseFromString(xml,'text/xml');
                 var errorElment=xmldom.getElementsByTagName('parsererror');
                 if(errorElment.length>0){
                     throw new Error('XML PARSER ERROR:'+errorElment[0].textContent);
                 }
             }else if(typeof ActiveXObject != 'undefined'){
                 xmldom=createDocument();
                 xmldom.loadXML(xml);
                 if(xmldom.parseError != 0){
                     throw new Error('XML PARSING ERROR:'+xmldom.parseError.reason);
                 }
             }else{
                 throw new Error('NO XML PARSER AVAILABLE');
             }
             return xmldom;
         },
         //把xmldom对象序列话成xml对象
         serializeXml:function(xmldom){
             if(typeof  XMLSerializer !='undefined'){
                 return new XMLSerializer().serializeToString(xmldom);
             }else if(typeof xmldom.xml !='undefined'){
                 return xmldom.xml;
             }else{
                 throw  new Error('Could not serialize xml dom');
             }
         }
     }

 }());

用法

 var xmldom=XmlUtil.parseXML('<root><child/></root>');
 console.log(xmldom);
 console.log(XmlUtil.serializeXml(xmldom));