JAVA 实现XML与JSON 相互转换

小鱼儿 2022-08-11 21:28 185阅读 0赞

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**

@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);
 }

原来的格式：

转换完的格式：

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

**  2.JSON 转换为XML格式**

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));		
 		
 	}

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：