javascript xml字符串转为JSON对象

/* ### jQuery XML to JSON Plugin v1.2 - 2013-02-18 ### * http://www.fyneworks.com/ - [e-mail]* Licensed under http://en.wikipedia.org/wiki/MIT_License ### Website: http://www.fyneworks.com/jquery/xml-to-json/*//* # INSPIRED BY: http://www.terracoder.com/           AND: http://www.thomasfrank.se/xml_to_json.htmlAND: http://www.kawa.net/works/js/xml/objtree-e.html*//* This simple script converts XML (document of code) into a JSON object. It is the combination of 2 'xml to json' great parsers (see below) which allows for both 'simple' and 'extended' parsing modes.*/// Avoid collisions;if(window.jQuery) (function($){  // Add function to jQuery namespace $.extend({    // converts xml documents and xml text to json object  xml2json: function(xml, extended) {   if(!xml) return {}; // quick fail      //### PARSER LIBRARY   // Core function   function parseXML(node, simple){    if(!node) return null;    var txt = '', obj = null, att = null;    var nt = node.nodeType, nn = jsVar(node.localName || node.nodeName);    var nv = node.text || node.nodeValue || '';    /*DBG*/ //if(window.console) console.log(['x2j',nn,nt,nv.length+' bytes']);    if(node.childNodes){     if(node.childNodes.length>0){      /*DBG*/ //if(window.console) console.log(['x2j',nn,'CHILDREN',node.childNodes]);      $.each(node.childNodes, function(n,cn){       var cnt = cn.nodeType, cnn = jsVar(cn.localName || cn.nodeName);       var cnv = cn.text || cn.nodeValue || '';       /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>a',cnn,cnt,cnv]);       if(cnt == 8){        /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>b',cnn,'COMMENT (ignore)']);        return; // ignore comment node       }       else if(cnt == 3 || cnt == 4 || !cnn){        // ignore white-space in between tags        if(cnv.match(/^\s+$/)){         /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>c',cnn,'WHITE-SPACE (ignore)']);         return;        };        /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>d',cnn,'TEXT']);        txt += cnv.replace(/^\s+/,'').replace(/\s+$/,'');// make sure we ditch trailing spaces from markup       }       else{        /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>e',cnn,'OBJECT']);        obj = obj || {};        if(obj[cnn]){         /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>f',cnn,'ARRAY']);         // http://forum.jquery.com/topic/jquery-jquery-xml2json-problems-when-siblings-of-the-same-tagname-only-have-a-textnode-as-a-childif(!obj[cnn].length) obj[cnn] = myArr(obj[cnn]);obj[cnn] = myArr(obj[cnn]);         obj[cnn][ obj[cnn].length ] = parseXML(cn, true/* simple */);         obj[cnn].length = obj[cnn].length;        }        else{         /*DBG*/ //if(window.console) console.log(['x2j',nn,'node>g',cnn,'dig deeper...']);         obj[cnn] = parseXML(cn);        };       };      });     };//node.childNodes.length>0    };//node.childNodes    if(node.attributes){     if(node.attributes.length>0){      /*DBG*/ //if(window.console) console.log(['x2j',nn,'ATTRIBUTES',node.attributes])      att = {}; obj = obj || {};      $.each(node.attributes, function(a,at){       var atn = jsVar(at.name), atv = at.value;       att[atn] = atv;       if(obj[atn]){        /*DBG*/ //if(window.console) console.log(['x2j',nn,'attr>',atn,'ARRAY']);        // http://forum.jquery.com/topic/jquery-jquery-xml2json-problems-when-siblings-of-the-same-tagname-only-have-a-textnode-as-a-child//if(!obj[atn].length) obj[atn] = myArr(obj[atn]);//[ obj[ atn ] ];        obj[cnn] = myArr(obj[cnn]);obj[atn][ obj[atn].length ] = atv;        obj[atn].length = obj[atn].length;       }       else{        /*DBG*/ //if(window.console) console.log(['x2j',nn,'attr>',atn,'TEXT']);        obj[atn] = atv;       };      });      //obj['attributes'] = att;     };//node.attributes.length>0    };//node.attributes    if(obj){     obj = $.extend( (txt!='' ? new String(txt) : {}),/* {text:txt},*/ obj || {}/*, att || {}*/);     txt = (obj.text) ? (typeof(obj.text)=='object' ? obj.text : [obj.text || '']).concat([txt]) : txt;     if(txt) obj.text = txt;     txt = '';    };    var out = obj || txt;    //console.log([extended, simple, out]);    if(extended){     if(txt) out = {};//new String(out);     txt = out.text || txt || '';     if(txt) out.text = txt;     if(!simple) out = myArr(out);    };    return out;   };// parseXML   // Core Function End   // Utility functions   var jsVar = function(s){ return String(s || '').replace(/-/g,"_"); };   // NEW isNum function: 01/09/2010// Thanks to Emile Grau, GigaTecnologies S.L., www.gigatransfer.com, www.mygigamail.comfunction isNum(s){// based on utility function isNum from xml2json plugin (http://www.fyneworks.com/ - [e-mail])// few bugs corrected from original function :// - syntax error : regexp.test(string) instead of string.test(reg)// - regexp modified to accept  comma as decimal mark (latin syntax : 25,24 )// - regexp modified to reject if no number before decimal mark  : ".7" is not accepted// - string is "trimmed", allowing to accept space at the beginning and end of stringvar regexp=/^((-)?([0-9]+)(([\.\,]{0,1})([0-9]+))?$)/return (typeof s == "number") || regexp.test(String((s && typeof s == "string") ? jQuery.trim(s) : ''));};// OLD isNum function: (for reference only)//var isNum = function(s){ return (typeof s == "number") || String((s && typeof s == "string") ? s : '').test(/^((-)?([0-9]*)((\.{0,1})([0-9]+))?$)/); };   var myArr = function(o){    // http://forum.jquery.com/topic/jquery-jquery-xml2json-problems-when-siblings-of-the-same-tagname-only-have-a-textnode-as-a-child//if(!o.length) o = [ o ]; o.length=o.length;    if(!$.isArray(o)) o = [ o ]; o.length=o.length;// here is where you can attach additional functionality, such as searching and sorting...    return o;   };   // Utility functions End   //### PARSER LIBRARY END      // Convert plain text to xml   if(typeof xml=='string') xml = $.text2xml(xml);      // Quick fail if not xml (or if this is a node)   if(!xml.nodeType) return;   if(xml.nodeType == 3 || xml.nodeType == 4) return xml.nodeValue;      // Find xml root node   var root = (xml.nodeType == 9) ? xml.documentElement : xml;      // Convert xml to json   var out = parseXML(root, true /* simple */);      // Clean-up memory   xml = null; root = null;      // Send output   return out;  },    // Convert text to XML DOM  text2xml: function(str) {   // NOTE: I'd like to use jQuery for this, but jQuery makes all tags uppercase   //return $(xml)[0];   var out;   try{    var xml = ((!$.support.opacity && !$.support.style))?new ActiveXObject("Microsoft.XMLDOM"):new DOMParser();    xml.async = false;   }catch(e){ throw new Error("XML Parser could not be instantiated") };   try{    if((!$.support.opacity && !$.support.style)) out = (xml.loadXML(str))?xml:false;    else out = xml.parseFromString(str, "text/xml");   }catch(e){ throw new Error("Error parsing XML string") };   return out;  } }); // extend $})(jQuery);

别人写的，需要用到jQuery库，用法$.xml2json()