Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
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;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class Main {
    public static void main(String[] args) throws Exception {
        File xmlFile = new File("test.xml");
        Document document = readXmlDocument(xmlFile);
        makeChanges(document);
        Transformer transformer = createXmlTransformer();
        overwriteXmlFile(xmlFile, document, transformer);
    }

    private static void overwriteXmlFile(File xmlFile, Document document, Transformer transformer)
            throws FileNotFoundException, TransformerException {
        StreamResult result = new StreamResult(new PrintWriter(new FileOutputStream(xmlFile, false)));
        DOMSource source = new DOMSource(document);
        transformer.transform(source, result);
    }

    private static Transformer createXmlTransformer() throws Exception {
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        return transformer;
    }

    private static void makeChanges(Document document) {
        Element root = document.getDocumentElement();
        root.setAttribute("test", "testvalue");
    }

    private static Document readXmlDocument(File xmlFile) throws Exception {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse(xmlFile);
        return document;
    }
}