js转换对象为xml

var XmlHelper=function(){
 var _arrayTypes={}
 var _self=this;
 /*
 *转换对象为xml
 *@obj 目标对象
 *@rootname 节点名称
 *@arraytypes 配置数组字段子元素的节点名称
 */
 this.parseToXML=function(obj,rootname,arraytypes){
 if(arraytypes){
  _arrayTypes=arraytypes;
 }
 var xml="";
 if(typeof obj!=="undefined"){
  if(Array.isArray(obj)){
  xml+=parseArrayToXML(obj,rootname);
  }else if(typeof obj==="object"){
  xml+=parseObjectToXML(obj,rootname);
  }else{
  xml+=parseGeneralTypeToXML(obj,rootname);
  }
 }
 return xml;
 }
 var parseObjectToXML=function(obj,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname="Object";
 }
 var xml="<"+rootname+">";
 if(obj){
  for(var field in obj){
  var value=obj[field];
  if(typeof value!=="undefined"){
   if(Array.isArray(value)){
   xml+=parseArrayToXML(value,field);
   }else if(typeof value==="object"){
   xml+=_self.parseToXML(value,field);
   }else{
   xml+=parseGeneralTypeToXML(value,field);
   }
  }
  }
 }
 xml+="";
 return xml;
 }
 var parseArrayToXML=function(array,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname="Array";
 }
 var xml="<"+rootname+">";
 if(array){
  var itemrootname=_arrayTypes[rootname];
  array.forEach(function(item){
  xml+=_self.parseToXML(item,itemrootname);
  });
 }
 xml+="";
 return xml;
 }
 var parseGeneralTypeToXML=function(value,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname=typeof value;
 }
 var xml="<"+rootname+">"+value+"";
 return xml;
 }
}
//===========测试==========
var xmlhelper=new XmlHelper();
//示例1
var testobj={
 field1:"1",
 field2:true,
 field3:[{a:1},{a:2}]
 }
console.log(xmlhelper.parseToXML(testobj,"testobj",{field3:"ArrayItem"}));
//输出：1true12
console.log("================================================");
//示例2
var testobj2=[1,2,3];
console.log(xmlhelper.parseToXML(testobj2,"testobj2"));
//输出:123