JAVA 实现XML与JSON 相互转换

Posted 2020-11-17

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原文地址https://blog.csdn.net/congcong68/article/details/39029907

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

[java] view plain copy

@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

[java] view plain copy

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：

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