Use external XML file for Resource Bundle

• Create list resource bundle file for default and supported locale. And read label value from xml file.
• This approach gives a facility to change label or message value, without compilation and redeployment of application.
• To do this first crate a xml file containing key and value pair, so that you can use label according to their key.

 
  home_greeting
  My Home application
   
 
  global_button_submit
  Press it
 
 
  global_button
  Enter value
 

• This method also give an option to use single file for different application, which are used as a library.
• Here you can write code to read xml file and assign key value pair to an object of resource bundle class.

public class MyResources extends ListResourceBundle {

    public MyResources() {
        super();
    }
  
  private static final Object[][] contents =
    { { "", "" }, { "", "" }, { "", "" } };

    protected Object[][] getContents() {
        try {
            File file = new File("C:\\Users\\admin\\Desktop\\locale\\Resource.xml");
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(file);
            doc.getDocumentElement().normalize();
            NodeList nList = doc.getElementsByTagName("label");

            for (int temp = 0; temp < nList.getLength(); temp++) {

                Node nNode = nList.item(temp);
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {

                    Element eElement = (Element)nNode;

                    contents[temp][0] = getTagValue("key", eElement);
                    contents[temp][1] = getTagValue("value", eElement);

                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return contents;
    }

    private static String getTagValue(String sTag, Element eElement) {
        NodeList nlList = eElement.getElementsByTagName(sTag).item(0).getChildNodes();
        Node nValue = (Node)nlList.item(0);

        return nValue.getNodeValue();
    }

}