XMLWriter.java

package org.opensource.clearpool.xml;

import java.io.FileOutputStream;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import junit.framework.TestCase;

import org.opensource.clearpool.util.XMLUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class XMLWriter extends TestCase {
  private static final String PATH = "xml/xml_writer.xml";

  public void test_XMLWriter() throws Exception {
    Document doc = XMLUtil.createDocument(PATH);

    NodeList list = doc.getElementsByTagName("password");
    for (int i = 0; i < list.getLength(); i++) {
      Node brandElement = list.item(i);
      String brandName = brandElement.getNodeName();
      if (brandName.equals("password")) {
        // update text content
        brandElement.setTextContent("1");
      }
    }

    // save xml
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();
    DOMSource domSource = new DOMSource(doc);
    // set code and use utf-8 as default encoding.
    transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");

    String path = this.getWholePath();
    System.out.println(path);
    StreamResult result = new StreamResult(new FileOutputStream(path));
    // transform DOM to xml file
    transformer.transform(domSource, result);
  }

  private String getWholePath() {
    String path = PATH;
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    if (classLoader == null) {
      path = ClassLoader.getSystemResource(path).getPath();
    } else {
      path = classLoader.getResource(path).getPath();
    }
    return path;
  }
}