如何在Java中删除XML命名空间

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

public class RemoveNamespaceExample {
    public static void main(String[] args) {
        try {
            // 加载XML文件
            File xmlFile = new File("path/to/your/xml/file.xml");
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.parse(xmlFile);

            // 获取根元素
            Element root = document.getDocumentElement();

            // 删除命名空间
            removeNamespace(root);

            // 保存修改后的XML文档
            saveDocument(document, "path/to/save/modified/xml/file.xml");
        } catch (ParserConfigurationException | SAXException | IOException | TransformerException e) {
            e.printStackTrace();
        }
    }

    private static void removeNamespace(Element element) {
        // 获取属性列表
        NamedNodeMap attributes = element.getAttributes();

        // 遍历属性列表
        for (int i = 0; i < attributes.getLength(); i++) {
            Node attribute = attributes.item(i);

            // 检查属性名称是否以"xmlns"开头
            if (attribute.getNodeName().startsWith("xmlns")) {
                // 如果是命名空间属性，将其从属性列表中移除
                element.removeAttribute(attribute.getNodeName());
            }
        }

        // 递归处理子元素
        NodeList children = element.getChildNodes();
        for (int i = 0; i < children.getLength(); i++) {
            Node child = children.item(i);
            if (child instanceof Element) {
                removeNamespace((Element) child);
            }
        }
    }

    private static void saveDocument(Document document, String filePath) throws TransformerException {
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource source = new DOMSource(document);
        StreamResult result = new StreamResult(new File(filePath));
        transformer.transform(source, result);
    }
}