在Java中将String XML片段转换为Document Node

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;

public class XmlToDocumentNode {
    public static void main(String[] args) {
        String xmlString = "<root><child>Hello World!</child></root>";

        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            InputSource is = new InputSource(new StringReader(xmlString));
            Document doc = builder.parse(is);

            System.out.println("Root element: " + doc.getDocumentElement().getNodeName());
            System.out.println("Child element: " + doc.getDocumentElement().getFirstChild().getNodeName());
            System.out.println("Child content: " + doc.getDocumentElement().getFirstChild().getTextContent());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}