用Java传输文件

Question

我搜索在一台PC和一台服务器之间建立连接。此连接必须通过Java应用程序完成。因此，我使用JSCH与SCP协议建立SSH连接。

我设法建立了连接，但无法传输文件。

import com.jcraft.jsch.*;
import java.awt.*;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.swing.*;

public class Logger {

    public static void main(String[] arg) throws FileNotFoundException, IOException {          
        try {
            JSch.setLogger(new MyLogger());
            JSch jsch = new JSch();

            Session session = jsch.getSession("*****", "***.***.***.***", 22);

            // username and password will be given via UserInfo interface.
            UserInfo ui = new MyUserInfo();
            session.setUserInfo(ui);

            session.connect();

            Channel channel = session.openChannel("exec");
            channel.connect();
            channel.disconnect();
            session.disconnect();

        } catch (JSchException e) {
            System.out.println(e);
        }
    }

    public static class MyLogger implements com.jcraft.jsch.Logger {

        static java.util.Hashtable name = new java.util.Hashtable();

        static {
            name.put(new Integer(DEBUG), "DEBUG: ");
            name.put(new Integer(INFO), "INFO: ");
            name.put(new Integer(WARN), "WARN: ");
            name.put(new Integer(ERROR), "ERROR: ");
            name.put(new Integer(FATAL), "FATAL: ");
        }

        @Override
        public boolean isEnabled(int level) {
            return true;
        }

        @Override
        public void log(int level, String message) {
            System.err.print(name.get(level));
            System.err.println(message);
        }
    }

    public static class MyUserInfo implements UserInfo, UIKeyboardInteractive {

        @Override
        public String getPassword() {
            return passwd;
        }

        @Override
        public boolean promptYesNo(String str) {
            Object[] options = {"yes", "no"};
            int foo = JOptionPane.showOptionDialog(null,
                    str,
                    "Warning",
                    JOptionPane.DEFAULT_OPTION,
                    JOptionPane.WARNING_MESSAGE,
                    null, options, options[0]);
            return foo == 0;
        }

        String passwd;
        JTextField passwordField = (JTextField) new JPasswordField(20);

        @Override
        public String getPassphrase() {
            return null;
        }

        @Override
        public boolean promptPassphrase(String message) {
            return true;
        }

        @Override
        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;
            }
        }

        @Override
        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;

        @Override
        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
            }
        }
    }
}

我在JSCH的站点网络中找到了更多示例，但是我不理解不同示例的工作方式。 （http://www.jcraft.com/jsch/examples/ScpTo.java.html）

所以，我继续搜索，我也找到了这个程序：

channel.put(from, fileName);

但是我认为该程序用于SFTP，而不用于SCP。

我也尝试这种方法：

        String command6 = "scp Source Destination";

        try {
            JSch.setLogger(new MyLogger());
            JSch jsch = new JSch();

            Session session = jsch.getSession("****", "***.***.***.***", 22);

            // username and password will be given via UserInfo interface.
            UserInfo ui = new MyUserInfo();
            session.setUserInfo(ui);

            session.connect();

            Channel channel = session.openChannel("exec");
            ((ChannelExec) channel).setCommand(command6);
            channel.connect();
            channel.disconnect();
            session.disconnect(); 

但是她不工作... 请帮帮我！