import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.junit.Test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
public class XMLParseTest {
@Test
public void testParse() throws JDOMException, IOException {
SAXBuilder sax = new SAXBuilder();
File file = new File("path/to/input.xml");
FileInputStream fis = new FileInputStream(file);
Document root = sax.build(fis);
Node node = convertToNode(root.getRootElement());
System.out.println(node);
String str = convertToXml(node, "");
System.out.println(str);
File outfile = new File("path/to/output.xml");
FileOutputStream fos = new FileOutputStream(outfile);
fos.write(str.getBytes(StandardCharsets.UTF_8));
private static final String space = " ";
private String convertToXml(Node node, String intend) {
StringBuilder sb = new StringBuilder();
sb.append(intend).append("<").append(node.getTagName()).append(">");
if (node.getChildren().isEmpty()) {
sb.append(node.getContent());
} else {
sb.append("\n");
node.getChildren().sort(Comparator.comparing(Node::getTagName));
for (Node child : node.getChildren()) {
sb.append(convertToXml(child, intend + space));
sb.append(intend).append("\n");
return sb.toString();
private Node convertToNode(Element root) {
Node node = new Node();
List
children = root.getChildren();
for (Element child : children) {
node.getChildren().add(convertToNode(child));
node.setTagName(root.getName());
node.setContent(root.getTextTrim());
return node;
static String xmlStr = "";
class Node {
String tagName;
String content;
List children = new ArrayList<>();
public String getTagName() {
return tagName;
public void setTagName(String tagName) {
this.tagName = tagName;
public String getContent() {
return content;
public void setContent(String content) {
this.content = content;
public List getChildren() {
return children;
public void setChildren(List children) {
this.children = children;
@Override
public String toString() {
this.getChildren().sort(Comparator.comparing(Node::getTagName));
StringBuilder sb = new StringBuilder();
sb.append("'").append(this.tagName).append("'").append(":").append("{");
for (int i = 0; i < children.size(); i++) {
Node child = children.get(i);
if(child.getChildren().isEmpty()) {
sb.append("'").append(child.getTagName()).append("'").append(":").append("'").append(child.getContent()).append("'");
if (i != children.size() - 1) {
sb.append(",");
} else {
sb.append(child.toString());
sb.append("}");
return sb.toString();
