Implémentation d'un logiciel FTP simple en langage Java - Explication détaillée du code de l'interface principale du logiciel FTP (4)

Cet article présente principalement en détail l'implémentation d'un logiciel FTP simple en langage Java et la méthode d'écriture de l'interface principale du logiciel FTP. Il a une certaine valeur de référence. Les amis intéressés peuvent s'y référer

Regardez d'abord. Jetons un coup d'œil au code global du logiciel FTP framework Le contenu spécifique est le suivant

1. , présentez l'entrée principale du programme FTPMain.java Adopte un beau style d'apparence

package com.oyp.ftp; 
 
import java.util.logging.Level; 
import java.util.logging.Logger; 
 
import javax.swing.UIManager; 
 
import com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel; 
 
public class FTPMain { 
 /** 
  * 本应用的程序入口 
  */ 
 public static void main(String args[]) { 
  //导致 runnable 的 run 方法在 EventQueue 的指派线程上被调用。 
  java.awt.EventQueue.invokeLater(new Runnable() { 
   public void run() { 
    try { 
     //使用 LookAndFeel 对象设置当前的默认外观。 
     UIManager.setLookAndFeel(new NimbusLookAndFeel());//设置一个非常漂亮的外观 
//     UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
     FTPClientFrame client_Frame = new FTPClientFrame(); 
     client_Frame.setVisible(true); 
    } catch (Exception ex) { 
     Logger.getLogger(FTPClientFrame.class.getName()).log( 
       Level.SEVERE, null, ex); 
    } 
   } 
  }); 
 } 
}

2. Introduction au code du programme principal de l'interface FTPClientFrame.java

package com.oyp.ftp; 
 
import java.awt.AWTException; 
import java.awt.MenuItem; 
import java.awt.PopupMenu; 
import java.awt.SystemTray; 
import java.awt.TrayIcon; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.WindowEvent; 
 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JMenu; 
import javax.swing.JMenuBar; 
import javax.swing.JMenuItem; 
import javax.swing.JPanel; 
import javax.swing.JPasswordField; 
import javax.swing.JSeparator; 
import javax.swing.JSplitPane; 
import javax.swing.JTabbedPane; 
import javax.swing.JTextField; 
import javax.swing.JToggleButton; 
import javax.swing.JToolBar; 
import javax.swing.UIManager; 
 
import com.oyp.ftp.panel.ftp.FtpPanel; 
import com.oyp.ftp.panel.local.LocalPanel; 
import com.oyp.ftp.panel.manager.FtpSiteDialog; 
import com.oyp.ftp.panel.queue.DownloadPanel; 
import com.oyp.ftp.panel.queue.QueuePanel; 
import com.oyp.ftp.panel.queue.UploadPanel; 
import com.oyp.ftp.utils.FtpClient; 
import com.oyp.ftp.utils.SiteInfoBean; 
import com.sun.java.swing.plaf.nimbus.*; 
 
public class FTPClientFrame extends javax.swing.JFrame { 
 FtpClient ftpClient; 
 private JPasswordField PassField; 
 private JButton cutLinkButton; 
 FtpPanel ftpPanel; 
 LocalPanel localPanel; 
 private JTextField portTextField; 
 private JTextField serverTextField; 
 private JTextField userTextField; 
 private QueuePanel queuePanel; 
 private UploadPanel uploadPanel; 
 private DownloadPanel downloadPanel; 
 private JSplitPane jSplitPane1; 
 private JButton linkButton; 
 private final LinkToAction LINK_TO_ACTION; // 连接到 按钮的动作处理器 
 private final CutLinkAction CUT_LINK_ACTION; // 断开 按钮的动作处理器 
 private SystemTray systemTray; 
 private JToggleButton shutdownButton; 
 private final ImageIcon icon = new ImageIcon(getClass().getResource( 
   "/com/oyp/ftp/res/trayIcon.png")); 
 
 public FTPClientFrame() { 
  LINK_TO_ACTION = new LinkToAction(this, "连接到", null); 
  CUT_LINK_ACTION = new CutLinkAction(this, "断开", null); 
  initComponents(); 
  initSystemTray(); 
 } 
 
 /** 
  * 初始化系统托盘的方法 
  */ 
 private void initSystemTray() { 
  if (SystemTray.isSupported()) 
   systemTray = SystemTray.getSystemTray(); 
  TrayIcon trayIcon = new TrayIcon(icon.getImage()); 
  PopupMenu popupMenu = new PopupMenu("托盘菜单"); 
 
  // 创建显示主窗体菜单项 
  MenuItem showMenuItem = new MenuItem("显示主窗体"); 
  showMenuItem.addActionListener(new ActionListener() { 
   @Override 
   public void actionPerformed(ActionEvent e) { 
    FTPClientFrame.this.setExtendedState(JFrame.NORMAL); 
    FTPClientFrame.this.setVisible(true); 
   } 
  }); 
 
  // 创建退出菜单项 
  MenuItem exitMenuItem = new MenuItem("退出"); 
  exitMenuItem.addActionListener(new ActionListener() { 
   @Override 
   public void actionPerformed(ActionEvent e) { 
    System.exit(0); 
   } 
  }); 
 
  popupMenu.add(showMenuItem); 
  popupMenu.addSeparator(); 
  popupMenu.add(exitMenuItem); 
  trayIcon.setPopupMenu(popupMenu); 
  try { 
   systemTray.add(trayIcon); 
  } catch (AWTException e) { 
   e.printStackTrace(); 
  } 
 } 
 
 /** 
  * 初始化程序界面的方法 
  */ 
 private void initComponents() { 
  setIconImage(icon.getImage()); 
  java.awt.GridBagConstraints gridBagConstraints; 
 
  JPanel jPanel1 = new JPanel(); 
  JToolBar jToolBar1 = new JToolBar(); 
  JButton linkTo = new JButton(); 
  cutLinkButton = new JButton(); 
  JPanel jPanel4 = new JPanel(); 
  JLabel jLabel1 = new JLabel(); 
  serverTextField = new JTextField(); 
  JLabel jLabel2 = new JLabel(); 
  userTextField = new JTextField(); 
  JLabel jLabel3 = new JLabel(); 
  PassField = new JPasswordField(); 
  JLabel jLabel6 = new JLabel(); 
  portTextField = new JTextField(); 
  linkButton = new JButton(); 
  JSplitPane jSplitPane2 = new JSplitPane(); 
  jSplitPane1 = new JSplitPane(); 
  ftpPanel = new FtpPanel(this); // 初始化FTP远程资源面板 
  localPanel = new LocalPanel(this); // 初始化本地资源管理面板 
  uploadPanel = new UploadPanel(); // 初始化上传队列面板 
  downloadPanel = new DownloadPanel(); // 初始化下载队列面板 
  queuePanel = new QueuePanel(this); // 初始化队列面板 
 
  JTabbedPane jTabbedPane1 = new JTabbedPane(); 
  JMenuBar MenuBar = new JMenuBar(); 
  JMenu fileMenu = new JMenu(); 
  JMenuItem ftpManageMenuItem = new JMenuItem(); 
  JSeparator jSeparator1 = new JSeparator(); 
  JMenuItem linkToMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem cutMenuItem = new javax.swing.JMenuItem(); 
  JSeparator jSeparator2 = new javax.swing.JSeparator(); 
  JMenuItem exitMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem uploadMenuItem = new javax.swing.JMenuItem(); 
  JSeparator jSeparator3 = new javax.swing.JSeparator(); 
  JMenuItem createFolderMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem renameMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem delMenuItem = new javax.swing.JMenuItem(); 
  JMenu ftpMenu = new javax.swing.JMenu(); 
  JMenuItem downMenuItem = new javax.swing.JMenuItem(); 
  JSeparator jSeparator6 = new javax.swing.JSeparator(); 
  JMenuItem ftpDelMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem ftpRenameMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem newFolderMenuItem = new javax.swing.JMenuItem(); 
  JMenu helpMenu = new javax.swing.JMenu(); 
  JMenuItem aboutMenuItem = new javax.swing.JMenuItem(); 
  JMenuItem bugMenuItem = new javax.swing.JMenuItem(); 
 
//  setTitle("基于Socket的FTP软件Java实现"); 
  setTitle("Java语言实现简单FTP软件欧阳鹏设计"); 
  addWindowListener(new java.awt.event.WindowAdapter() { 
   public void windowOpened(java.awt.event.WindowEvent evt) { 
    formWindowOpened(evt); 
   } 
 
   public void windowIconified(final WindowEvent e) { 
    setVisible(false); 
   } 
  }); 
  addComponentListener(new java.awt.event.ComponentAdapter() { 
   public void componentResized(java.awt.event.ComponentEvent evt) { 
    formComponentResized(evt); 
   } 
  }); 
  getContentPane().setLayout(new java.awt.GridBagLayout()); 
 
  jPanel1.setLayout(new java.awt.GridLayout(0, 1)); 
 
  jToolBar1.setRollover(true); 
  jToolBar1.setFloatable(false); 
 
  linkTo.setText("连接到"); 
  linkTo.setFocusable(false); 
  linkTo.setAction(LINK_TO_ACTION); 
  jToolBar1.add(linkTo); 
 
  cutLinkButton.setText("断开"); 
  cutLinkButton.setEnabled(false); 
  cutLinkButton.setFocusable(false); 
  cutLinkButton.setAction(CUT_LINK_ACTION); 
  jToolBar1.add(cutLinkButton); 
 
  jPanel1.add(jToolBar1); 
   
  shutdownButton = new JToggleButton(); 
  shutdownButton.setText("自动关机"); 
  shutdownButton.setToolTipText("队列完成后，自动关闭计算机"); 
  shutdownButton.setFocusable(false); 
  jToolBar1.add(shutdownButton); 
 
  jPanel4.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 
  jPanel4.setLayout(new javax.swing.BoxLayout(jPanel4, 
    javax.swing.BoxLayout.LINE_AXIS)); 
 
  jLabel1.setText("主机地址："); 
  jPanel4.add(jLabel1); 
 
  serverTextField.setText("192.168.1.100"); 
  serverTextField.addKeyListener(new java.awt.event.KeyAdapter() { 
   public void keyPressed(java.awt.event.KeyEvent evt) { 
    LinkFTPKeyPressed(evt); 
   } 
  }); 
  jPanel4.add(serverTextField); 
 
  jLabel2.setText("用户名："); 
  jPanel4.add(jLabel2); 
 
  userTextField.setText("oyp"); 
  userTextField.setMaximumSize(new java.awt.Dimension(200, 2147483647)); 
  userTextField.setPreferredSize(new java.awt.Dimension(100, 21)); 
  userTextField.addKeyListener(new java.awt.event.KeyAdapter() { 
   public void keyPressed(java.awt.event.KeyEvent evt) { 
    LinkFTPKeyPressed(evt); 
   } 
  }); 
  jPanel4.add(userTextField); 
 
  jLabel3.setText("密码："); 
  jPanel4.add(jLabel3); 
 
  PassField.setText("oyp"); 
  PassField.setMaximumSize(new java.awt.Dimension(200, 2147483647)); 
  PassField.setPreferredSize(new java.awt.Dimension(100, 21)); 
  PassField.addKeyListener(new java.awt.event.KeyAdapter() { 
   public void keyPressed(java.awt.event.KeyEvent evt) { 
    LinkFTPKeyPressed(evt); 
   } 
  }); 
  jPanel4.add(PassField); 
 
  jLabel6.setText("端口："); 
  jPanel4.add(jLabel6); 
 
  portTextField.setText("21"); 
  portTextField.setMaximumSize(new java.awt.Dimension(100, 2147483647)); 
  portTextField.setPreferredSize(new java.awt.Dimension(50, 21)); 
  portTextField.addKeyListener(new java.awt.event.KeyAdapter() { 
   public void keyPressed(java.awt.event.KeyEvent evt) { 
    LinkFTPKeyPressed(evt); 
   } 
  }); 
  jPanel4.add(portTextField); 
 
  linkButton.setText("连接"); 
  linkButton.setFocusable(false); 
  linkButton.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER); 
  linkButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM); 
  linkButton.addActionListener(new java.awt.event.ActionListener() { 
   public void actionPerformed(java.awt.event.ActionEvent evt) { 
    linkButtonActionPerformed(evt); 
   } 
  }); 
  jPanel4.add(linkButton); 
 
  jPanel1.add(jPanel4); 
 
  gridBagConstraints = new java.awt.GridBagConstraints(); 
  gridBagConstraints.gridx = 0; //指定包含组件的显示区域开始边的单元格，其中行的第一个单元格为 gridx=0。 
  gridBagConstraints.gridy = 0; //指定位于组件显示区域的顶部的单元格，其中最上边的单元格为 gridy=0。 
  //当组件的显示区域大于它所请求的显示区域的大小时使用此字段。 
  gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL; //在水平方向而不是垂直方向上调整组件大小。 
  gridBagConstraints.weightx = 1.0; //指定如何分布额外的水平空间。 
  getContentPane().add(jPanel1, gridBagConstraints); 
 
  jSplitPane2.setBorder(null); 
  jSplitPane2.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT); 
  jSplitPane2.setResizeWeight(1.0); 
  jSplitPane2.setContinuousLayout(true); 
 
  jSplitPane1.setpiderLocation(400); 
  jSplitPane1.setpiderSize(10); 
  jSplitPane1.setOneTouchExpandable(true); 
  jSplitPane1.setRightComponent(ftpPanel); 
  jSplitPane1.setLeftComponent(localPanel); 
 
  jSplitPane2.setLeftComponent(jSplitPane1); 
 
  jTabbedPane1.setMinimumSize(new java.awt.Dimension(40, 170)); 
 
  jTabbedPane1.addTab("队列", queuePanel);// 添加队列面板 
  jTabbedPane1.addTab("上传队列", uploadPanel);// 添加上传面板 
  jTabbedPane1.addTab("下载队列", downloadPanel);// 添加下载面板 
 
  jSplitPane2.setBottomComponent(jTabbedPane1); 
 
  gridBagConstraints = new java.awt.GridBagConstraints(); 
  gridBagConstraints.gridx = 0; 
  gridBagConstraints.gridy = 1; 
  gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH; //在水平方向和垂直方向上同时调整组件大小。 
  gridBagConstraints.weightx = 1.0; //指定如何分布额外的水平空间。 
  gridBagConstraints.weighty = 1.0; //指定如何分布额外的垂直空间。 
  getContentPane().add(jSplitPane2, gridBagConstraints); 
 
  fileMenu.setMnemonic('f'); 
  fileMenu.setText("站点(F)"); 
 
  ftpManageMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke( 
    java.awt.event.KeyEvent.VK_S, 
    java.awt.event.InputEvent.CTRL_MASK)); 
  ftpManageMenuItem.setText("FTP站点管理(S)"); 
  ftpManageMenuItem.addActionListener(new ActionListener() { 
   @Override 
   public void actionPerformed(ActionEvent e) { 
//    System.out.println("action"); 
    FtpSiteDialog dialog = new FtpSiteDialog(FTPClientFrame.this); 
    dialog.setVisible(true); 
   } 
  }); 
  fileMenu.add(ftpManageMenuItem); 
  fileMenu.add(jSeparator1); 
 
  linkToMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke( 
    java.awt.event.KeyEvent.VK_C, 
    java.awt.event.InputEvent.CTRL_MASK)); 
  linkToMenuItem.setText("连接到...(C)"); 
  linkToMenuItem.setAction(LINK_TO_ACTION); 
  fileMenu.add(linkToMenuItem); 
 
  cutMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke( 
    java.awt.event.KeyEvent.VK_Z, 
    java.awt.event.InputEvent.CTRL_MASK)); 
  cutMenuItem.setText("断开(Z)"); 
  cutMenuItem.setAction(CUT_LINK_ACTION); 
  fileMenu.add(cutMenuItem); 
  fileMenu.add(jSeparator2); 
 
  exitMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke( 
    java.awt.event.KeyEvent.VK_X, 
    java.awt.event.InputEvent.CTRL_MASK)); 
  exitMenuItem.setText("退出(X)"); 
  exitMenuItem.addActionListener(new ActionListener() { 
   @Override 
   public void actionPerformed(ActionEvent e) { 
    System.exit(0); 
   } 
  }); 
  fileMenu.add(exitMenuItem); 
 
  MenuBar.add(fileMenu); 
 
  JMenu localMenu = new JMenu(); 
  localMenu.setMnemonic('l'); 
  localMenu.setText("本地(L)"); 
 
  uploadMenuItem.setMnemonic('U'); 
  uploadMenuItem.setText("上传(U)"); 
  uploadMenuItem.setAction(localPanel.getActionMap().get("uploadAction")); 
 
  localMenu.add(uploadMenuItem); 
  localMenu.add(jSeparator3); 
 
  createFolderMenuItem.setMnemonic('C'); 
  createFolderMenuItem.setText("新建文件夹(C)"); 
  createFolderMenuItem.setAction(localPanel.getActionMap().get( 
    "createFolderAction")); 
  localMenu.add(createFolderMenuItem); 
 
  renameMenuItem.setMnemonic('R'); 
  renameMenuItem.setText("重命名(R)"); 
  renameMenuItem.setAction(localPanel.getActionMap().get("renameAction")); 
  localMenu.add(renameMenuItem); 
 
  delMenuItem.setMnemonic('D'); 
  delMenuItem.setText("删除(D)"); 
  delMenuItem.setAction(localPanel.getActionMap().get("delAction")); 
  localMenu.add(delMenuItem); 
 
  JMenuItem localrefreshMenuItem = new JMenuItem(); 
  localrefreshMenuItem.setMnemonic('R'); 
  localrefreshMenuItem.setText("刷新(R)"); 
  localrefreshMenuItem.setAction(localPanel.getActionMap().get( 
    "refreshAction")); 
  localMenu.add(localrefreshMenuItem); 
 
  MenuBar.add(localMenu); 
 
  ftpMenu.setMnemonic('r'); 
  ftpMenu.setText("远程(R)"); 
 
  downMenuItem.setMnemonic('U'); 
  downMenuItem.setText("下载(U)"); 
  downMenuItem.setAction(ftpPanel.getActionMap().get("downAction")); 
  ftpMenu.add(downMenuItem); 
  ftpMenu.add(jSeparator6); 
 
  ftpDelMenuItem.setMnemonic('D'); 
  ftpDelMenuItem.setText("删除(D)"); 
  ftpDelMenuItem.setAction(ftpPanel.getActionMap().get("delAction")); 
  ftpMenu.add(ftpDelMenuItem); 
 
  ftpRenameMenuItem.setMnemonic('R'); 
  ftpRenameMenuItem.setText("重命名(R)"); 
  ftpRenameMenuItem 
    .setAction(ftpPanel.getActionMap().get("renameAction")); 
  ftpMenu.add(ftpRenameMenuItem); 
 
  newFolderMenuItem.setMnemonic('C'); 
  newFolderMenuItem.setText("新建文件夹(C)"); 
  newFolderMenuItem.setAction(ftpPanel.getActionMap().get( 
    "createFolderAction")); 
  ftpMenu.add(newFolderMenuItem); 
 
  JMenuItem refreshMenuItem = new JMenuItem(); 
  refreshMenuItem.setMnemonic('R'); 
  refreshMenuItem.setText("刷新(R)"); 
  refreshMenuItem.setAction(ftpPanel.getActionMap().get("refreshAction")); 
  ftpMenu.add(refreshMenuItem); 
 
  MenuBar.add(ftpMenu); 
 
  helpMenu.setText("帮助(H)"); 
  aboutMenuItem.setMnemonic('a'); 
  aboutMenuItem.setText("关于(A)"); 
  aboutMenuItem.addActionListener(new AboutItemAction(this)); 
  helpMenu.add(aboutMenuItem); 
 
  bugMenuItem.setMnemonic('u'); 
  bugMenuItem.setText("错误报告(U)"); 
  bugMenuItem.addActionListener(new BugItemAction()); 
  helpMenu.add(bugMenuItem); 
 
  MenuBar.add(helpMenu); 
 
  setJMenuBar(MenuBar); 
 
  java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit() 
    .getScreenSize(); 
  setBounds((screenSize.width - 800) / 2, (screenSize.height - 600) / 2, 
    800, 700); 
 } 
 
 public JToggleButton getShutdownButton() { 
  return shutdownButton; 
 } 
 
 /** 
  * 窗体装载的事件处理方法 
  */ 
 private void formWindowOpened(java.awt.event.WindowEvent evt) { 
  jSplitPane1.setpiderLocation(0.50); 
  localPanel.getLocalDiskComboBox().setSelectedIndex(1); 
  localPanel.getLocalDiskComboBox().setSelectedIndex(0); 
 } 
 
 /** 
  * 窗体大小调整的事件处理方法 
  */ 
 private void formComponentResized(java.awt.event.ComponentEvent evt) { 
  jSplitPane1.setpiderLocation(0.50); 
 } 
 
 /** 
  * 连接按钮的事件处理方法 
  */ 
 private void linkButtonActionPerformed(java.awt.event.ActionEvent evt) { 
  try { 
   String server = serverTextField.getText(); // 获取服务器地址 
   if (server == null) { 
    return; 
   } 
   String portStr = portTextField.getText(); // 获取端口号 
   if (portStr == null) { 
    portStr = "21"; 
   } 
   int port = Integer.parseInt(portStr.trim()); 
   String userStr = userTextField.getText(); // 获取用户名 
   userStr = userStr == null ? "" : userStr.trim(); 
   String passStr = PassField.getText(); // 获取密码 
   passStr = passStr == null ? "" : passStr.trim(); 
   cutLinkButton.doClick(); 
   ftpClient = new FtpClient(); 
   ftpClient.openServer(server.trim(), port); // 连接服务器 
   ftpClient.login(userStr, passStr); // 登录服务器 
   ftpClient.binary(); // 使用二进制传输模式 
   if (ftpClient.serverIsOpen()) { // 如果连接成功 
    CUT_LINK_ACTION.setEnabled(true); // 设置断开按钮可用 
   } else { // 否则 
    CUT_LINK_ACTION.setEnabled(false); // 设置断开按钮不可用 
    return; // 并结束事件处理 
   } 
   // 设置本地资源管理面板的FTP连接信息 
   localPanel.setFtpClient(server, port, userStr, passStr); 
   // 设置上传按钮可用 
   localPanel.getActionMap().get("uploadAction").setEnabled(true); 
   ftpPanel.setFtpClient(ftpClient);// 设置FTP资源管理面板的FTP连接信息 
   // 设置下载按钮可用 
   ftpPanel.getActionMap().get("downAction").setEnabled(true); 
   ftpPanel.refreshCurrentFolder();// 刷新FTP资源管理面板的当前文件夹 
   queuePanel.startQueue(); // 启动任务队列线程 
  } catch (Exception ex) { 
   ex.printStackTrace(); 
  } 
 } 
 
 /** 
  * 连接FTP相关的文本框 和密码框的回车事件 
  */ 
 private void LinkFTPKeyPressed(java.awt.event.KeyEvent evt) { 
  if (evt.getKeyChar() == '\n') { 
   linkButton.doClick(); 
  } 
 } 
 
 public LocalPanel getLocalPanel() { 
  return localPanel; 
 } 
 
 public FtpPanel getFtpPanel() { 
  return ftpPanel; 
 } 
 
 public QueuePanel getQueuePanel() { 
  return queuePanel; 
 } 
 
 public UploadPanel getUploadPanel() { 
  return uploadPanel; 
 } 
 
 public DownloadPanel getDownloadPanel() { 
  return downloadPanel; 
 } 
 
 public FtpClient getFtpClient() { 
  return ftpClient; 
 } 
 
 /** 
  * 设置FTP连接信息的方法，由FTP站点管理器调用 
  */ 
 public void setLinkInfo(SiteInfoBean bean) { 
  serverTextField.setText(bean.getServer()); // 设置主机地址 
  portTextField.setText(bean.getPort() + ""); // 设置端口号 
  userTextField.setText(bean.getUserName()); // 设置用户名 
  PassField.setText(""); // 密码清空 
  PassField.requestFocus(); // 密码框请求焦点 
 } 
}

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