Modify XML File In Java Example – (DOM Parser)
Chapter:
XML
Last Updated:
15-07-2016 13:55:51 UTC
Program:
/* ............... START ............... */
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
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;
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;
public class JavaModityXMLFileExample {
public static void main(String argv[]) {
try {
String filepath = "c:\\file.xml";
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.parse(filepath);
// Get the root element
Node company = doc.getFirstChild();
// Get the staff element by tag name directly
Node staff = doc.getElementsByTagName("staff").item(0);
// update staff attribute
NamedNodeMap attr = staff.getAttributes();
Node nodeAttr = attr.getNamedItem("id");
nodeAttr.setTextContent("2");
// append a new node to staff
Element age = doc.createElement("age");
age.appendChild(doc.createTextNode("30"));
staff.appendChild(age);
// loop the staff child node
NodeList list = staff.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node node = list.item(i);
// get the salary element, and update the value
if ("salary".equals(node.getNodeName())) {
node.setTextContent("2000000");
}
// remove firstname
if ("firstname".equals(node.getNodeName())) {
staff.removeChild(node);
}
}
// write the content into xml file
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(filepath));
transformer.transform(source, result);
System.out.println("Done");
} catch (ParserConfigurationException pce) {
pce.printStackTrace();
} catch (TransformerException tfe) {
tfe.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (SAXException sae) {
sae.printStackTrace();
}
}
}
/* ............... END ............... */
Notes:
-
The Document Object Model (DOM Parser) is an official recommendation of the World Wide Web Consortium (W3C). It defines an interface that enables programs to access and update the style, structure,and contents of XML documents.
Tags
Modify XML File, Java