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import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.SwingWorker;
public class SwingWorkerDemo extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JTextField installe= new JTextField();
private JDialog dialog;
private boolean telechargement_fini=false;
private boolean cancel=false;
class MonSwingWorker extends SwingWorker<Integer, String> {
private URL url;
private String localFilename;
private String userAgent;
public MonSwingWorker(URL url, String localFilename, String userAgent){
this.url=url;
this.localFilename=localFilename;
this.userAgent=userAgent;
}
public Integer Calcul() throws IOException {
InputStream is = null;
FileOutputStream fos = null;
Boolean erreur=false;
installe.setText("Chargement (0%)");
try {
URLConnection urlConn = url.openConnection();
int fileLength = urlConn.getContentLength();
if (fileLength == -1)
{
System.out.println("An error occured !");
erreur=true;
}
if(!erreur){
if (userAgent != null) {
urlConn.setRequestProperty("User-Agent", userAgent);
}
is = urlConn.getInputStream();
fos = new FileOutputStream(localFilename);
byte[] buffer = new byte[4096];
int len, percent, rate = 0;
while ((len = is.read(buffer)) > 0 && !cancel) {
fos.write(buffer, 0, len);
rate += len;
percent = (int)(rate * 100 / fileLength);
installe.setText("Chargement (" + percent + "%)");
}
}
} finally {
try {
if (is != null) {
is.close();
}
} finally {
if (fos != null) {
fos.close();
}
}
}
if(!erreur){
installe.setText("Chargement (100%)");
//dialog.setVisible(false);
cancel=false;
telechargement_fini=true;
}
return null;
}
@Override
public Integer doInBackground() {
Integer calcul = null;
try {
calcul = Calcul();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return calcul;
}
public boolean isTelechargement_fini() {
// TODO Auto-generated method stub
return telechargement_fini;
}
}
public SwingWorkerDemo() {
/* Construction de l'interface graphique. */
super("SwingWorkerDemo");
installe.setEditable(false);
Object[] array = {"Téléchargement en cours...", installe};
String[] options={"Annuler"};
final JOptionPane optionpane = new JOptionPane(array, JOptionPane.INFORMATION_MESSAGE, JOptionPane.CANCEL_OPTION, null , options);
dialog = new JDialog();
dialog.setContentPane(optionpane);
dialog.setLocationRelativeTo(null);
dialog.pack();
dialog.setVisible(true);
optionpane.addPropertyChangeListener(new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent e) {
String value = ((String)optionpane.getValue()).intern();
System.out.println("option pane"+value);
if (dialog.isVisible() && (e.getSource() == optionpane) && value.equals("Annuler")) {
cancel=true;
dialog.setVisible(false);
}
}
});
}
public static void main(String... args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
/* Démarrage de l'interface graphique et du SwingWorker. */
SwingWorkerDemo demo = new SwingWorkerDemo();
MonSwingWorker swingWorker = null;
try {
swingWorker = demo.new MonSwingWorker(new URL("http://jep2006.irisa.fr/word-to-pdf.pdf"), "Guide_pdf.pdf", null);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
swingWorker.execute();
// On attend la fin du téléchargement
while(swingWorker.isDone()==false) {
// ne rien faire
}
//Action après le téléchargement....
if(swingWorker.isTelechargement_fini()){
JOptionPane.showMessageDialog(null, "Le téléchargement est terminé", "Téléchargement terminé", JOptionPane.INFORMATION_MESSAGE);
}
}
});
}
} |
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