用Java合并两个XML文件

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class XmlMerge {
    public static void main(String[] args) {
        try {
            File file1 = new File("file1.xml");
            File file2 = new File("file2.xml");

            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();

            Document doc1 = db.parse(file1);
            Document doc2 = db.parse(file2);

            // 在此处添加合并逻辑
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

NodeList nodes2 = doc2.getDocumentElement().getChildNodes();
for (int i = 0; i< nodes2.getLength(); i++) {
    Node node = nodes2.item(i);
    if (node instanceof Element) {
        Node importedNode = doc1.importNode(node, true);
        doc1.getDocumentElement().appendChild(importedNode);
    }
}

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc1);
StreamResult result = new StreamResult(new File("merged.xml"));
transformer.transform(source, result);