xmlresourcebundlecontrol.java

用xml+swing+jdbc(hsqldb)写的电视广告管理软件 客户定义好广告的具体信息

package util;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.ResourceBundle.Control;

public class XMLResourceBundleControl extends Control {
	private static String XML = "xml";

	public List<String> getFormats(String baseName) {
		return Collections.singletonList(XML);
	}

	public ResourceBundle newBundle(String baseName, Locale locale,
			String format, ClassLoader loader, boolean reload)
			throws IllegalAccessException, InstantiationException, IOException {
		if ((baseName == null) || (locale == null) || (format == null)
				|| (loader == null)) {
			throw new NullPointerException();
		}
		ResourceBundle bundle = null;
		if (format.equals(XML)) {
			String bundleName = toBundleName(baseName, locale);
			String resourceName = toResourceName(bundleName, format);
			URL url = loader.getResource(resourceName);
			if (url != null) {
				URLConnection connection = url.openConnection();
				if (connection != null) {
					if (reload) {
						connection.setUseCaches(false);
					}
					InputStream stream = connection.getInputStream();
					if (stream != null) {
						BufferedInputStream bis = new BufferedInputStream(
								stream);
						bundle = new XMLResourceBundle(bis);
						bis.close();
					}
				}
			}
		}
		return bundle;
	}
	private static class XMLResourceBundle extends ResourceBundle {
		private Properties props;
		XMLResourceBundle(InputStream stream) throws IOException {
		props = new Properties();
		props.loadFromXML(stream);
		}
		protected Object handleGetObject(String key) {
		return props.getProperty(key);
		}
		public Enumeration<String> getKeys() {
		Set<String> handleKeys = props.stringPropertyNames();
		return Collections.enumeration(handleKeys);
		}
		}
}