Java HTML/XML - 如何从父级删除元素

import java.io.StringReader;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;

public class Main {
  public static String getXMLData(){
    return "<a><img/><x></x></a>";
  }
  
  public static void main(String[] argv) throws Exception {

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    Document doc = factory.newDocumentBuilder().parse(new InputSource(new StringReader(getXMLData())));
    Element element = (Element) doc.getElementsByTagName("x").item(0);

    Node parent = element.getParentNode();

    parent.removeChild(element);

    parent.normalize();
    
    System.out.println(parent);
  }
}