JAVA 实现XML与JSON 相互转换

在工作中，经常碰到XML转为JSON或者JSON转为XML，在这过程中有时嵌套很多层，容易错误，我把实现的代码分享出来，希望对有用到的人提供借鉴。

1.把XML转为JSON格式

<span style="font-size:18px;">@SuppressWarnings("rawtypes")
	public static  String xmlToJSON(String xml,int jsonType) {
		JSONObject obj = new JSONObject();
		try {
			InputStream is = new ByteArrayInputStream(xml.getBytes("utf-8"));
			SAXBuilder sb = new SAXBuilder();
			Document doc = sb.build(is);
			Element root = doc.getRootElement();
			Map map=iterateElement(root);
		   obj.put(root.getName(),map);
		   return obj.toString();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}


@SuppressWarnings({ "unchecked", "rawtypes" })
	private static Map  iterateElement(Element root) {
		List childrenList = root.getChildren();
		Element element = null;
		Map map = new HashMap();
		List list = null;
		for (int i = 0; i < childrenList.size(); i++) {
			list = new ArrayList();
			element = (Element) childrenList.get(i);
			if(element.getChildren().size()>0){
				if(root.getChildren(element.getName()).size()>1){
					if (map.containsKey(element.getName())) {
						list = (List) map.get(element.getName());
					}
					list.add(iterateElement(element));
					map.put(element.getName(), list);
				}else{
					map.put(element.getName(), iterateElement(element));
				}
			}else {
                if(root.getChildren(element.getName()).size()>1){
                	if (map.containsKey(element.getName())) {
    					list = (List) map.get(element.getName());
    				}
                	list.add(element.getTextTrim());
                	map.put(element.getName(), list);
				}else{
					map.put(element.getName(), element.getTextTrim());
				}
			}
		}

		return map;
	}



	public static void main(String[] args) throws ParseException
	{		
		String xml="<ROOT>"+
		"<Status>00</Status>"+
		"<ErrorMsg></ErrorMsg>"+
		"<Data>"+
		   "<Row>"+
		      "<PERSONID>35020500200610000000000701355116</PERSONID>"+
		      "<XM>吴聪楠</XM><SFZH>350624198908052530</SFZH>"+
		   "</Row>"+
		   "<Row>"+
		      "<PERSONID>35020500200610000000000701355117</PERSONID>"+
		      "<XM>吴聪楠2</XM><SFZH>350624198908052531</SFZH>"+
		      "</Row>"+
		  "</Data>"+
	"</ROOT>";


	    String str=Xml2JsonUtil.xmlToJSON(xml,1);
      System.out.println(str);
}</span>

原来的格式：

转换完的格式：

<span style="font-size:18px;">{"ROOT":{"Data":{"Row":[{"SFZH":"350624198908052530","XM":"吴聪楠","PERSONID":"35020500200610000000000701355116"},{"SFZH":"350624198908052530","XM":"吴聪楠2","PERSONID":"35020500200610000000000701355117"}]},"Status":"00","ErrorMsg":""}}</span>

2.JSON 转换为XML格式

<span style="font-size:18px;">public static  String JsonToXml(Object json) 
	{
		if(json==null){
			return null;
		}else{
		 Element elements=new Element("xml");
		 getXMLFromObject(json,"xml",elements);
		 XMLOutputter xmlOut = new XMLOutputter();  
		 String res=xmlOut.outputString(elements);
		 return res;
       }
	}


private static void getXMLFromObject(Object obj,String tag,Element parent)
	{
		if(obj==null)
			return;
		Element child;
		String eleStr;
		Object childValue;
		if(obj instanceof JSONObject)
		{
			JSONObject jsonObject=(JSONObject)obj;
			for(Object temp:jsonObject.keySet())
			{
				eleStr=temp.toString();
				childValue=jsonObject.get(temp);
				child=new Element(eleStr);
				if(childValue instanceof JSONArray)
					getXMLFromObject(childValue,eleStr,parent,count);
				else{
					parent.addContent(child);
					getXMLFromObject(childValue,eleStr,child,count);
				}
			}
		}else if(obj instanceof JSONArray){
			JSONArray jsonArray=(JSONArray)obj;
			for(int i=0;i<jsonArray.size();i++)
			{
				childValue=jsonArray.get(i);
				child=new Element(tag);
				parent.addContent(child);
				getXMLFromObject(childValue,tag,child,count);
			}
		}else if(obj instanceof Date){
			SimpleDateFormat sf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
			parent.setText(sf.format((Date)obj));
		}else{
			parent.setText(obj.toString());
		}
	}


public static void main(String[] args) throws ParseException
	{
  JSONObject rootObject=new JSONObject();

      JSONArray dataArray=new JSONArray();
      JSONObject dataObject1=new JSONObject();
      dataObject1.put("PERSONID", "35020500200610000000000701355117");
      dataObject1.put("XM", "吴聪楠");
      dataObject1.put("SFZH","350624198908052530");
      dataArray.add(dataObject1);
      JSONObject dataObject2=new JSONObject();
      dataObject2.put("PERSONID", "35020500200610000000000701355116");
      dataObject2.put("XM", "吴聪楠2");
      dataObject2.put("SFZH","350624198908052531");
      dataArray.add(dataObject2);

      JSONObject dataRootObject=new JSONObject();
      dataRootObject.put("Row", dataArray);
      JSONObject dataObject=new JSONObject();
      dataObject.put("Status", "00");
      dataObject.put("ErrorMsg", "");
      dataObject.put("Data",dataRootObject);
      rootObject.put("ROOT", dataObject);

      System.out.println(rootObject.toString());
      System.out.println(JsonToXml(rootObject));		

	}</span>

原来的格式：

{"ROOT":{"Status":"00","ErrorMsg":"","Data":{"Row":[{"PERSONID":"35020500200610000000000701355117","XM":"吴聪楠","SFZH":"350624198908052530"},{"PERSONID":"35020500200610000000000701355116","XM":"吴聪楠2","SFZH":"350624198908052531"}]}}}

转换完的格式：

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JAVA 实现XML与JSON 相互转换

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