js的json转xml,xml转json,string2Xml

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String.prototype.replaceAll  = function(s1,s2){   s1=s1.replace(/([\(\)\[\]\{\}\^\$\+\-\*\?\.\"\'\|\/\\])/g,"\\$1");//转义特殊字符return this.replace(new RegExp(s1,"gm"),s2);    }Ext.ns('App');App.JSON = new (function(){    this.toJSONObject = function(o){    return Ext.util.JSON.decode(o);    };    this.toJSONString = function(json){    return Ext.util.JSON.encode(json);    };    this.json2xml = function(o, tab) {     var toXml = function(v, name, ind) {        var xml = "";        if (v instanceof Array) {           for (var i=0, n=v.length; i<n; i++)              xml += ind + toXml(v[i], name, ind+"\t") + "\n";        }        else if (typeof(v) == "object") {           var hasChild = false;           xml += ind + "<" + name;           for (var m in v) {              if (m.charAt(0) == "@")                 xml += " " + m.substr(1) + "=\"" + v[m].toString() + "\"";              else                 hasChild = true;           }           xml += hasChild ? ">" : "/>";           if (hasChild) {              for (var m in v) {                 if (m == "#text")                    xml += v[m];                 else if (m == "#cdata")                    xml += "<![CDATA[" + v[m] + "]]>";                 else if (m.charAt(0) != "@")                    xml += toXml(v[m], m, ind+"\t");              }              xml += (xml.charAt(xml.length-1)=="\n"?ind:"") + "</" + name + ">";           }        }        else {           xml += ind + "<" + name + ">" + v.toString() +  "</" + name + ">";        }        return xml;     }, xml="";     for (var m in o)        xml += toXml(o[m], m, "");     return tab ? xml.replace(/\t/g, tab) : xml.replace(/\t|\n/g, "");  };this.string2Xml = function(str){　　if(document.all){　　var xmlDom=new ActiveXObject("Microsoft.XMLDOM")　　xmlDom.loadXML(str)　　return xmlDom　　}　　else　　return new DOMParser().parseFromString(str, "text/xml")};this.xml2json = function(xml, tab) {     var X = {        toObj: function(xml) {           var o = {};           if (xml.nodeType==1) {   // element node ..              if (xml.attributes.length)   // element with attributes  ..                 for (var i=0; i<xml.attributes.length; i++)                    o["@"+xml.attributes[i].nodeName] = (xml.attributes[i].nodeValue||"").toString();              if (xml.firstChild) { // element has child nodes ..                 var textChild=0, cdataChild=0, hasElementChild=false;                 for (var n=xml.firstChild; n; n=n.nextSibling) {                    if (n.nodeType==1) hasElementChild = true;                    else if (n.nodeType==3 && n.nodeValue.match(/[^ \f\n\r\t\v]/)) textChild++; // non-whitespace text                    else if (n.nodeType==4) cdataChild++; // cdata section node                 }                 if (hasElementChild) {                    if (textChild < 2 && cdataChild < 2) { // structured element with evtl. a single text or/and cdata node ..                       X.removeWhite(xml);                       for (var n=xml.firstChild; n; n=n.nextSibling) {                          if (n.nodeType == 3)  // text node                             o["#text"] = X.escape(n.nodeValue);                          else if (n.nodeType == 4)  // cdata node                             o["#cdata"] = X.escape(n.nodeValue);                          else if (o[n.nodeName]) {  // multiple occurence of element ..                             if (o[n.nodeName] instanceof Array)                                o[n.nodeName][o[n.nodeName].length] = X.toObj(n);                             else                                o[n.nodeName] = [o[n.nodeName], X.toObj(n)];                          }                          else  // first occurence of element..                             o[n.nodeName] = X.toObj(n);                       }                    }                    else { // mixed content                       if (!xml.attributes.length)                          o = X.escape(X.innerXml(xml));                       else                          o["#text"] = X.escape(X.innerXml(xml));                    }                 }                 else if (textChild) { // pure text                    if (!xml.attributes.length)                       o = X.escape(X.innerXml(xml));                    else                       o["#text"] = X.escape(X.innerXml(xml));                 }                 else if (cdataChild) { // cdata                    if (cdataChild > 1)                       o = X.escape(X.innerXml(xml));                    else                       for (var n=xml.firstChild; n; n=n.nextSibling)                          o["#cdata"] = X.escape(n.nodeValue);                 }              }              if (!xml.attributes.length && !xml.firstChild) o = null;           }           else if (xml.nodeType==9) { // document.node              o = X.toObj(xml.documentElement);           }           else              alert("unhandled node type: " + xml.nodeType);           return o;        },        toJson: function(o, name, ind) {           var json = name ? ("\""+name+"\"") : "";           if (o instanceof Array) {              for (var i=0,n=o.length; i<n; i++)                 o[i] = X.toJson(o[i], "", ind+"\t");              json += (name?":[":"[") + (o.length > 1 ? ("\n"+ind+"\t"+o.join(",\n"+ind+"\t")+"\n"+ind) : o.join("")) + "]";           }           else if (o == null)              json += (name&&":") + "null";           else if (typeof(o) == "object") {              var arr = [];              for (var m in o)                 arr[arr.length] = X.toJson(o[m], m, ind+"\t");              json += (name?":{":"{") + (arr.length > 1 ? ("\n"+ind+"\t"+arr.join(",\n"+ind+"\t")+"\n"+ind) : arr.join("")) + "}";           }           else if (typeof(o) == "string")              json += (name&&":") + "\"" + o.toString() + "\"";           else              json += (name&&":") + o.toString();           return json;        },        innerXml: function(node) {           var s = ""           if ("innerHTML" in node)              s = node.innerHTML;           else {              var asXml = function(n) {                 var s = "";                 if (n.nodeType == 1) {                    s += "<" + n.nodeName;                    for (var i=0; i<n.attributes.length;i++)                       s += " " + n.attributes[i].nodeName + "=\"" + (n.attributes[i].nodeValue||"").toString() + "\"";                    if (n.firstChild) {                       s += ">";                       for (var c=n.firstChild; c; c=c.nextSibling)                          s += asXml(c);                       s += "</"+n.nodeName+">";                    }                    else                       s += "/>";                 }                 else if (n.nodeType == 3)                    s += n.nodeValue;                 else if (n.nodeType == 4)                    s += "<![CDATA[" + n.nodeValue + "]]>";                 return s;              };              for (var c=node.firstChild; c; c=c.nextSibling)                 s += asXml(c);           }           return s;        },        escape: function(txt) {           return txt.replace(/[\\]/g, "\\\\")                     .replace(/[\"]/g, '\\"')                     .replace(/[\n]/g, '\\n')                     .replace(/[\r]/g, '\\r');        },        removeWhite: function(e) {           e.normalize();           for (var n = e.firstChild; n; ) {              if (n.nodeType == 3) {  // text node                 if (!n.nodeValue.match(/[^ \f\n\r\t\v]/)) { // pure whitespace text node                    var nxt = n.nextSibling;                    e.removeChild(n);                    n = nxt;                 }                 else                    n = n.nextSibling;              }              else if (n.nodeType == 1) {  // element node                 X.removeWhite(n);                 n = n.nextSibling;              }              else                      // any other node                 n = n.nextSibling;           }           return e;        }     };     if (xml.nodeType == 9) // document node        xml = xml.documentElement;     var json = X.toJson(X.toObj(X.removeWhite(xml)), xml.nodeName, "\t");     return "{\n" + tab + (tab ? json.replace(/\t/g, tab) : json.replace(/\t|\n/g, "")) + "\n}";  }})();
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