Dom4JParser.java

package ro.bmocanu.tests.xml.dom4j;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

public class Dom4JParser {

    public void modifyDocument(File inputXml) {

        try {
            SAXReader saxReader = new SAXReader();
            Document document = saxReader.read(inputXml);

            List list = document.selectNodes("//article/@level");
            Iterator iter = list.iterator();
            while (iter.hasNext()) {
                Attribute attribute = (Attribute) iter.next();
                if (attribute.getValue().equals("Intermediate"))
                    attribute.setValue("Introductory");
            }

            list = document.selectNodes("//article/@date");
            iter = list.iterator();
            while (iter.hasNext()) {
                Attribute attribute = (Attribute) iter.next();
                if (attribute.getValue().equals("December-2001"))
                    attribute.setValue("October-2002");
            }

            list = document.selectNodes("//article");
            iter = list.iterator();
            while (iter.hasNext()) {
                Element element = (Element) iter.next();
                Iterator iterator = element.elementIterator("title");
                while (iterator.hasNext()) {
                    Element titleElement = (Element) iterator.next();
                    if (titleElement.getText().equals("Java configuration with XML Schema"))
                        titleElement.setText("Create flexible and extensible XML schema");
                }
            }

            list = document.selectNodes("//article/author");
            iter = list.iterator();
            while (iter.hasNext()) {
                Element element = (Element) iter.next();
                Iterator iterator = element.elementIterator("firstname");
                while (iterator.hasNext()) {
                    Element firstNameElement = (Element) iterator.next();
                    if (firstNameElement.getText().equals("Marcello"))
                        firstNameElement.setText("Ayesha");
                }

            }

            list = document.selectNodes("//article/author");
            iter = list.iterator();
            while (iter.hasNext()) {
                Element element = (Element) iter.next();
                Iterator iterator = element.elementIterator("lastname");
                while (iterator.hasNext()) {
                    Element lastNameElement = (Element) iterator.next();
                    if (lastNameElement.getText().equals("Vitaletti"))
                        lastNameElement.setText("Malik");

                }

            }
            XMLWriter output = new XMLWriter(
                    new FileWriter(new File("c:/catalog/catalog-modified.xml")));
            output.write(document);
            output.close();
        } catch (DocumentException e) {
            System.out.println(e.getMessage());
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }
    }

    public static void main(String[] argv) {

        Dom4JParser dom4jParser = new Dom4JParser();
        dom4jParser.modifyDocument(new File("c:/catalog/catalog.xml"));

    }

}