String对象与xml文档对象的相互转换

经常遇到在js里面需要解析xml的问题，然而有时候，后台返回的不是dom 而是string 字符串，需要将字符串转换成dom对象，然后才可以进行节点值解析和读取

 

var  bankXml = '<root><bank>工行</bank><bankId>101011110</bankId></root>'

 

var bankDom = createXml(bankXml);

 

//将字符串转化成dom对象  add by lc 20101203
function createXml(str){

 if(document.all){
    var xmlDom = new ActiveXObject("Microsoft.XMLDOM");
    xmlDom.loadXML(str);
    return xmlDom;
 }else
    return new DOMParser().parseFromString(str,"text/xml");
}

 

 

 

1.string转换为xml

function stringToXml(xmlString)
{
   var xmlDoc;
   if(typeof xmlString == "string")
   {
    //FF
    if (document.implementation.createDocument) {
         var parser = new DOMParser()
         xmlDoc = parser.parseFromString(xmlString, "application/xml")
    //IE
    } else if (window.ActiveXObject) {
         xmlDoc = new ActiveXObject("Microsoft.XMLDOM")
         xmlDoc.async="false"
         xmlDoc.loadXML(xmlString)
    }
  }
  else
  {
        xmlDoc = xmlString;
   }
   return xmlDoc;
}

function stringToXml(xmlString)
{
   var xmlDoc;
   if(typeof xmlString == "string")
   {
	//FF
	if (document.implementation.createDocument) {
	     var parser = new DOMParser()
	     xmlDoc = parser.parseFromString(xmlString, "application/xml")
	//IE
	} else if (window.ActiveXObject) {
	     xmlDoc = new ActiveXObject("Microsoft.XMLDOM")
	     xmlDoc.async="false"
	     xmlDoc.loadXML(xmlString)
	}	
  }
  else
  {	
        xmlDoc = xmlString;
   }
   return xmlDoc;
}

2.xml转换为string

function xmlToString()
{
    if (window.ActiveXObject) {
        return this.xmlDoc.xml;  //IE
    } else {
        return (new XMLSerializer()).serializeToString(this.xmlDoc);  //FF
    }
}