Как преобразовать фрагмент XML в строку в Java

Question

Входной XML

<Employees>
    <Employee>
        <EmpId>101398</EmpId>
        <Name>ABC</Name>
    </Employee>
    <Employee>
        <EmpId>101399</EmpId>
        <Name>XYZ</Name>
    </Employee>
<Employees>


Output XML
String : "<Employee><EmpId>101398</EmpId><Name>ABC</Name></Employee>"

Примечание: я не хочу использовать XSLT. Буду благодарен за ваш ответ.

Answer 1

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

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;

import javax.xml.transform.OutputKeys;
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 XMLFormatter {
    public static void main(String[] args) throws Exception{
        File fXmlFile = new File("src/a.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);

        doc.getDocumentElement().normalize();

        System.out.println("Root element :" + doc.getDocumentElement().getNodeName());

        NodeList nList = doc.getElementsByTagName("Employee");

        System.out.println("----------------------------");

        for (int temp = 0; temp < nList.getLength(); temp++) {

            System.out.println(nodeToString(nList.item(temp)));

        }
    }

    private static String nodeToString(Node node) {
        StringWriter sw = new StringWriter();
        try {
          Transformer t = TransformerFactory.newInstance().newTransformer();
          t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
          t.setOutputProperty(OutputKeys.INDENT, "yes");
          t.transform(new DOMSource(node), new StreamResult(sw));
        } catch (TransformerException te) {
          System.out.println("nodeToString Transformer Exception");
        }
        return sw.toString();
      }


}

Запуск кода для вашей проблемы a.xml содержит ваши XML-данные