How to upload local file to folder in App Server?

<zk>
	<window apply="ctrl.UploadCtrl">
		<button id="uploadBtn" label="Upload file" />
		<separator />
		<image id="img" />
		<separator />
		<label id="msgLb" />
	</window>
</zk>

package ctrl;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.zkoss.util.media.Media;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.*;


public class UploadCtrl extends GenericForwardComposer {

	private Image img;
	private Label msgLb;
	private static final int FILE_SIZE = 100;// 100k
	private static final String SAVE_PATH = "c:\\myfile\\media\\";

	@Override
	public void doAfterCompose(Component comp) throws Exception {
		super.doAfterCompose(comp);
	}

	public void onClick$uploadBtn() {
		msgLb.setValue("");
		
		
		try {
			Media media = Fileupload.get();
			
			if(media == null){
				msgLb.setValue("please select a file");
				return;
			}
			
			String type = media.getContentType().split("/")[0];
			if (type.equals("image")) {
				if (media.getByteData().length > FILE_SIZE * 1024) {
					msgLb.setValue("File size limit " + FILE_SIZE + "k");
					return;
				}				
				org.zkoss.image.Image picture = (org.zkoss.image.Image) media;
				img.setContent(picture);
			}

			saveFile(media);

		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	private void saveFile(Media media) {
		BufferedInputStream in = null;
		BufferedOutputStream out = null;
		try {
			InputStream fin = media.getStreamData();			
			in = new BufferedInputStream(fin);
			
			File baseDir = new File(SAVE_PATH);

			if (!baseDir.exists()) {
				baseDir.mkdirs();
			}

			File file = new File(SAVE_PATH + media.getName());
			
			OutputStream fout = new FileOutputStream(file);
			out = new BufferedOutputStream(fout);
			byte buffer[] = new byte[1024];
			int ch = in.read(buffer);
			while (ch != -1) {
				out.write(buffer, 0, ch);
				ch = in.read(buffer);
			}			
			msgLb.setValue("sucessed upload :" + media.getName());
		} catch (IOException e) {
			throw new RuntimeException(e);
		} catch (Exception e) {
			throw new RuntimeException(e);
		} finally {
			try {
				if (out != null) 
					out.close();	
				
				if (in != null)
					in.close();
				
			} catch (IOException e) {
				throw new RuntimeException(e);
			}
		}

	}

}