urlutil.java

mywork是rcp开发的很好的例子

package net.sf.pim;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import net.sf.component.config.ConfigHelper;
import net.sf.pim.plugin.MyworkPlugin;

public class URLUtil {
    static URL baseURL;
    private static boolean plugged = false;
    private static boolean initialized = false;

    private URLUtil() {
    }

    public static URL getResourceURL(String s) {
        if (!initialized)
            init();
        URL url = null;
        if (plugged) {
            try {
                url = new URL(baseURL, s);
            }
            catch (MalformedURLException e) {
                ;
            }
        }
        else {
            try {
                url = new File(ConfigHelper.getDataHome() + s).toURL();
            }
            catch (MalformedURLException e) {
                ;
            }
        }
        return url;
    }

    static private void init() {
    	MyworkPlugin defaultPlugin= MyworkPlugin.getDefault();
		if (defaultPlugin != null)
		{
			baseURL= defaultPlugin.getBundle().getEntry("/plugin.xml");
			plugged= true;
		}
        initialized = true;
    }
}