请参阅下面的代码。我可以使用不确定的方法来完成，并希望使用进度条更新来完成％请参阅下面的代码
package com.vilas.isstexport;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.border.EmptyBorder;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;
import javax.swing.BorderFactory;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JTextField;
import javax.swing.SwingWorker;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.awt.event.ActionEvent;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.TitledBorder;
import java.awt.Component;
public class Dataexport extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JTextField textField;
private JButton btnExecute = new JButton("Execute");
private JProgressBar progressBar = new JProgressBar();
private JScrollPane scrollPane = new JScrollPane();
private JTextArea textArea = new JTextArea();
private BackgroundTask backgroundTask;
private final JLabel statusLabel = new JLabel("Status: ", JLabel.CENTER);
private final ActionListener buttonActions = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
JButton source = (JButton) ae.getSource();
System.out.println(source.toString());
if (source == btnExecute) {
textArea.setText(null);
btnExecute.setEnabled(false);
backgroundTask = new BackgroundTask();
backgroundTask.execute();
progressBar.setIndeterminate(true);
}
/*else if (source == stopButton) {
backgroundTask.cancel(true);
backgroundTask.done();
}*/
}
};
private final JLabel lblProgressActivity = new JLabel("Progress Activity");
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Dataexport frame = new Dataexport();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
public String getPassword(){ return passwd; }
public boolean promptYesNo(String str){
Object[] options={ "yes", "no" };
int optionOutput=JOptionPane.showOptionDialog(null,
str,
"Warning",
JOptionPane.DEFAULT_OPTION,
JOptionPane.WARNING_MESSAGE,
null, options, options[0]);
return optionOutput==0;
}
String passwd;
JTextField passwordField=(JTextField)new JPasswordField(20);
public String getPassphrase(){ return null; }
public boolean promptPassphrase(String message){ return true; }
public boolean promptPassword(String message){
Object[] ob={passwordField};
int result=
JOptionPane.showConfirmDialog(null, ob, message,
JOptionPane.OK_CANCEL_OPTION);
if(result==JOptionPane.OK_OPTION){
passwd=passwordField.getText();
return true;
}
else{
return false;
}
}
public void showMessage(String message){
JOptionPane.showMessageDialog(null, message);
}
final GridBagConstraints gbc =
new GridBagConstraints(0,0,1,1,1,1,
GridBagConstraints.NORTHWEST,
GridBagConstraints.NONE,
new Insets(0,0,0,0),0,0);
private Container panel;
public String[] promptKeyboardInteractive(String destination,
String name,
String instruction,
String[] prompt,
boolean[] echo){
panel = new JPanel();
panel.setLayout(new GridBagLayout());
gbc.weightx = 1.0;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.gridx = 0;
panel.add(new JLabel(instruction), gbc);
gbc.gridy++;
gbc.gridwidth = GridBagConstraints.RELATIVE;
JTextField[] texts=new JTextField[prompt.length];
for(int i=0; i<prompt.length; i++){
gbc.fill = GridBagConstraints.NONE;
gbc.gridx = 0;
gbc.weightx = 1;
panel.add(new JLabel(prompt[i]),gbc);
gbc.gridx = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 1;
if(echo[i]){
texts[i]=new JTextField(20);
}
else{
texts[i]=new JPasswordField(20);
}
panel.add(texts[i], gbc);
gbc.gridy++;
}
if(JOptionPane.showConfirmDialog(null, panel,
destination+": "+name,
JOptionPane.OK_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE)
==JOptionPane.OK_OPTION){
String[] response=new String[prompt.length];
for(int i=0; i<prompt.length; i++){
response[i]=texts[i].getText();
}
return response;
}
else{
return null; // cancel
}
}
}
private class BackgroundTask extends SwingWorker<Integer, String> {
private int status;
public BackgroundTask() {
System.out.println("state:: "+(this.getState()).toString());
statusLabel.setText((this.getState()).toString());
}
@Override
protected Integer doInBackground() {
//String[] command = { "ls -lrt" };
//String command = "ls -lrt";
String command = textField.getText().toString();
ChannelExec exec = null;
try {
JSch jsch=new JSch();
String host=null;
host=JOptionPane.showInputDialog("Enter [email protected]",
System.getProperty("user.name")+
"@localhost");
String user=host.substring(0, host.indexOf('@'));
host=host.substring(host.indexOf('@')+1);
Session session=jsch.getSession(user, host, 22);
// username and password will be given via UserInfo interface.
UserInfo ui=new MyUserInfo();
session.setUserInfo(ui);
session.connect();
exec = (ChannelExec) session.openChannel("exec");
exec.setCommand(command);
exec.setInputStream(null);
exec.setErrStream(System.err);
exec.connect();
String s;
BufferedReader stdout = new BufferedReader(
new InputStreamReader(exec.getInputStream()));
//System.out.println("s:: "+stdout.readLine());
while ((s = stdout.readLine()) != null && !isCancelled()) {
//System.out.println("s:: "+s);
publish(s);
}
if (!isCancelled()) {
status = exec.getExitStatus();
}
exec.getInputStream().close();
exec.getOutputStream().close();
// exec.getErrorStream().close();
//p.destroy();
exec.disconnect();
session.disconnect();
} catch (IOException ex) {
ex.printStackTrace(System.err);
} catch (JSchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return status;
}
@Override
protected void process(java.util.List<String> messages) {
System.out.println("messages:: "+messages);
statusLabel.setText((this.getState()).toString());
for (String message : messages) {
textArea.append(message + "\n");
}
}
@Override
protected void done() {
statusLabel.setText((this.getState()).toString() + " " + status);
//stopButton.setEnabled(false);
btnExecute.setEnabled(true);
progressBar.setIndeterminate(false);
}
}
/**
* Create the frame.
*/
public Dataexport() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 761, 497);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JPanel panel = new JPanel();
panel.setAutoscrolls(true);
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap()
.addComponent(panel, GroupLayout.DEFAULT_SIZE, 739, Short.MAX_VALUE))
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()
.addContainerGap(44, Short.MAX_VALUE)
.addComponent(panel, GroupLayout.PREFERRED_SIZE, 431, GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
panel.setLayout(null);
textField = new JTextField();
textField.setBounds(232, 12, 114, 19);
textField.setColumns(10);
panel.add(textField);
btnExecute.setBounds(232, 95, 114, 25);
panel.add(btnExecute);
btnExecute.addActionListener(buttonActions);
progressBar.setEnabled(false);
progressBar.setBounds(232, 51, 370, 14);
panel.add(progressBar);
scrollPane.setAlignmentY(Component.BOTTOM_ALIGNMENT);
scrollPane.setAlignmentX(Component.RIGHT_ALIGNMENT);
scrollPane.setViewportBorder(new TitledBorder(null, "", TitledBorder.LEADING, TitledBorder.TOP, null, null));
scrollPane.setBounds(33, 163, 680, 240);
panel.add(scrollPane);
scrollPane.setBorder(BorderFactory.createTitledBorder("Output: "));
scrollPane.setViewportView(textArea);
JLabel lblEnterTheCommand = new JLabel("Enter the Command");
lblEnterTheCommand.setBounds(33, 14, 152, 15);
panel.add(lblEnterTheCommand);
lblProgressActivity.setBounds(33, 51, 152, 15);
panel.add(lblProgressActivity);
contentPane.setLayout(gl_contentPane);
}
}
您的代码用于更新进度条的位置在哪里？ – PeterMmm