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));