gziptest.java

GZIP为GUN支持的ZIP压缩格式

package example;

import javax.microedition.lcdui.*;
import javax.microedition.m2g.SVGImage;
import javax.microedition.m2g.ScalableGraphics;
import javax.microedition.midlet.*; 

import java.io.*;
import javax.microedition.io.Connector;
import javax.microedition.io.ContentConnection;
import javax.microedition.io.StreamConnection;
import javax.microedition.io.HttpConnection;

// Import GZIPInputStream class
import com.tinyline.util.GZIPInputStream;

/**
 * GZIPTest is a sample MIDlet that uses GZIPInputStream.
 */
public class GZIPTest extends MIDlet implements Runnable {

		/** The example URLs. It is the same SVG content. */
		String url = "http://www.tinyline.com/demo/svg/roadmap.svg";
		String url2 ="http://www.tinyline.com/demo/svg/roadmap.svgz";
		public static final String SVG_IMAGE = "/svg/thumbsUp.svg";
		
    Gauge gauge;
    Form form;

 		private Display display;
 		private SvgCanvas2 svgCanvas;

   /**
     * Create the progress form and gauge.
     * This program is not interactive, it will exit when done.
     */
    public GZIPTest() {
        gauge = new Gauge("Progress", false, 10, 0);
        form = new Form("Progress");
        form.append(gauge);
        Display.getDisplay(this).setCurrent(form);
    }

    /**
     * Start a thread to run.
     */
    public void startApp() {
        new Thread(this).start();
    }

    /**
     * Run the examples.
     */
    public void run()
		{
	     try
			 {
            gauge.setLabel("Get using ContentConnection");
            gauge.setValue(2);
	          getViaContentConnection(url);
	          //getViaContentConnection(url2);
	     }
			 catch (Exception e)
			 {
            System.out.println(e);
            e.printStackTrace();
       }
       gauge.setValue(10);
       notifyDestroyed();
		}

    public void pauseApp()
		{
    }

    /**
     * Destroy must cleanup everything.  The thread is signaled
     * to stop and no result is produced.
     * @param unconditional true if forced shutdown.
     */
    public void destroyApp(boolean unconditional) {
    }

    void getViaContentConnection(String url) throws IOException
    {
        ContentConnection c = null;
        InputStream is = null;
				GZIPInputStream gis = null;
        byte[] buf = new byte[512];
        int len;
        try
        {
           c = (ContentConnection)Connector.open(url);
           is = c.openInputStream();
					 // If the url ends with svgz then use the
					 // GZIPInputStream
           if(url.endsWith("svgz"))
           {
							// Open the GZIPInputStream the regular way
              is = new GZIPInputStream(is);
           }
           long t0,t1;                  // time stamps
           t0 = System.currentTimeMillis();

					 //Read the gzip archive.
           //while ((len = is.read(buf)) >= 0)
					 {
							 // Print the content if you want
							 //System.out.println(""+ new String(buf));
           }
           
           //while ((len = is.read(buf)) >= 0)
					 {
							 // Print the content if you want
							 //System.out.println(""+ new String(buf));
           }
           t1 = System.currentTimeMillis();
           System.out.println(url+ " elapsed time: " + (t1-t0));
           
           InputStream svgDemoStream = getClass().getResourceAsStream(SVG_IMAGE);
           
           svgCanvas = new SvgCanvas2 (false,svgDemoStream);

           
           //svgCanvas = new SvgCanvas2 (false,is);
        	//svgCanvas.setCommandListener(this);
        
					// *** grab a reference to the display
        	display = Display.getDisplay(this);
        	display.setCurrent(svgCanvas);
        }
        finally
        {
           if (is != null)
           is.close();
           if (c != null)
           c.close();
        }
    }
}