Java XML Document to Stream writeXML(Document doc, OutputStream os)

Description

write out an XML file

License

Open Source License

Parameter

Parameter	Description
doc	a parameter
os	a parameter

Exception

Parameter	Description
TransformerException	an exception
IOException	an exception

Declaration

public static void writeXML(Document doc, OutputStream os) throws TransformerException, IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.IOException;

import java.io.OutputStream;

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.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**//  ww w .j ava 2  s . c o  m
     * write out an XML file
     * 
     * @param doc
     * @param os
     * @throws TransformerException 
     * @throws IOException 
     */
    public static void writeXML(Document doc, OutputStream os) throws TransformerException, IOException {
        // write out xml file
        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer();

        //indent XML properly
        formatXML(doc, doc.getDocumentElement(), "  ");

        //normalize document
        doc.getDocumentElement().normalize();

        //write XML to file
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(os);
        transformer.transform(source, result);
        os.close();
    }

    /**
     * format XML into human readable form
     * @param document
     * @param root
     * @param tab
     */
    private static void formatXML(Document document, org.w3c.dom.Element root, String tab) {
        NodeList children = root.getChildNodes();
        // save the nodes in the array first
        Node[] nodes = new Node[children.getLength()];
        for (int i = 0; i < children.getLength(); i++)
            nodes[i] = children.item(i);
        // insert identations
        for (int i = 0; i < nodes.length; i++) {
            root.insertBefore(document.createTextNode("\n" + tab), nodes[i]);
            if (nodes[i] instanceof org.w3c.dom.Element)
                formatXML(document, (org.w3c.dom.Element) nodes[i], "  " + tab);
        }
        root.appendChild(document.createTextNode("\n" + tab.substring(0, tab.length() - 2)));
    }
}

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5. writeXML(Document doc, OutputStream os)
6. writeXML(Document doc, OutputStream out)
7. writeXml(Document doc, OutputStream outputStream)
8. writeXML(Document document, OutputStream os)
9. writeXML(final Document doc, final OutputStream out)