how to update xml from java

hi friend,

To solve your problem, please visit to:
http://www.roseindia.net/xml/



Thanks

Hi Friend,

Here is the solution for your problem. Suppose we have one xml file named "document.xml"

document.xml
============

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Company>
<Employee>
<name>koaml</name>
</Employee>
<Employee>
<name>newsTrack</name>
</Employee>
<Employee>
<name>Girish Tewari</name>
</Employee>
</Company>

We are going to modify the value of this XML file. ModifyXML class is being used to modify the attribute value.


import java.io.*;
import java.io.BufferedWriter;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

public class ModifyXML {

public final static void main(String[] args) throws Exception {
File file = new File("document.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

dbf.setCoalescing(true);
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(file);

ModifyXML obj = new ModifyXML ();
obj.changeValue(doc, "k1", "koaml");
obj.save(file,doc);
}

public void changeValue(Document doc, String oldValue, String NewValue) throws Exception {

Element root = doc.getDocumentElement();

NodeList childNodes = root.getElementsByTagName("Employee");

for (int i = 0; i < childNodes.getLength(); i++) {
NodeList subChildNodes = childNodes.item(i).getChildNodes();
for (int j = 0; j < subChildNodes.getLength(); j++) {
try {
if (subChildNodes.item(j).getTextContent().equals(oldValue)) {
subChildNodes.item(j).setTextContent(NewValue);
}
} catch (Exception e) {
}
}
}
}

public void save(File file ,Document doc) throws Exception {

TransformerFactory factory1 = TransformerFactory.newInstance();
Transformer transformer = factory1.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
DOMSource source = new DOMSource(doc);
transformer.transform(source, result);
String s = writer.toString();
System.out.println(s);

FileWriter fileWriter = new FileWriter(file);
BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

bufferedWriter.write(s);

bufferedWriter.flush();
bufferedWriter.close();
}
}

We hope that this will help you in solving your problem.

Thanks
Rose India Team

Thank You very much for this good tutorial.