mainframe.java

本代码以J2SE 5.0为开发环境

package book.net.ftp.client;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.List;
import java.awt.Point;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.WindowEvent;
import java.io.InputStream;
import java.util.StringTokenizer;
import java.util.Vector;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import book.string.ChangeCharset;

import sun.net.ftp.FtpClient;

public class MainFrame extends JFrame {
	//连接服务器的按钮
	JButton connectButton = new JButton("连 接");
	// FTP服务器IP地址输入框
	JLabel IPLabel = new JLabel("IP：");
	JTextField serverIPTextField = new JTextField(16);
	// /用户名标签和输入框
	JLabel userNameLabel = new JLabel("用户名：");
	JTextField userNameTextField = new JTextField(16);
	// 密码标签和输入框
	JLabel passwordLabel = new JLabel("密码：");
	JTextField passwordTextField = new JTextField(16);
	// 当前目录标签和输入框
	JLabel currentDirLabel = new JLabel("当前目录：");
	JTextField currentDirTextField = new JTextField(30);
	// 转入上一级目录的按钮
	JButton upLevelButton = new JButton("上一级目录");
	// 上载和下载文件的按钮
	JButton downloadButton = new JButton("下载");
	JButton uploadButton = new JButton("上传");
	// 断开和退出的按钮
	JButton disconnectButton = new JButton("断开");
	JButton exitButton = new JButton("关闭");

	// 表格的数据，用于显示FTP服务器上的信息
	String[] columnname = { "文件名", "文件大小", "修改日期" };
	DefaultTableModel tableModel = new DefaultTableModel();
	JTable ftpFileInfosTable = new JTable();
	JScrollPane ftpFileScrollPane1 = new JScrollPane(ftpFileInfosTable);

	// 下载和上传的文件对话框
	FileDialog saveFileDialog = new FileDialog(this, "Download To ..",
			FileDialog.SAVE);
	FileDialog openFileDialog = new FileDialog(this, "Upload File ..",
			FileDialog.LOAD);

	FtpClient ftpClient = null;
	// IP地址、用户名、密码、FTP路径
	String ip = "";
	String username = "";
	String password = "";
	String path = "";

	// 当前FTP目录下的文件和目录信息
	Vector files = new Vector();
	Vector fileSizes = new Vector();
	Vector fileTypes = new Vector();
	Vector fileDates = new Vector();

	// 当前选择的表格中的行号和列号
	int row = 0;
	int column = 0;

	// 当前正在执行上下载任务的线程
	Vector performTaskThreads = new Vector();
	// 显示当前的任务列表
	java.awt.List taskList = new List();
	// 显示FTP客户端程序的控制台信息
	JTextArea consoleTextArea = new JTextArea();

	// 因为从FTP中取得编码是ISO-8859-1，为了支持中文，所以将其转换。
	// 这个类是在将字符串的章节中定义的，这里直接使用了。
	ChangeCharset changeCharset = new ChangeCharset();
	
	public MainFrame() {
		init();
		setLocation(100, 150);
		setTitle("FTP 客户端");
		pack();
		try {
			// 设置界面为系统默认外观
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			SwingUtilities.updateComponentTreeUI(this);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	private void init(){
		// 初始化各个文本框
		serverIPTextField.setText("127.0.0.1");
		userNameTextField.setText("");
		passwordTextField.setText("");
		currentDirTextField.setText("");
		currentDirTextField.setEditable(false);

		// 将IP、用户名、密码、连接标签和输入框放在面板panel1中
		JPanel panel1 = new JPanel();
		panel1.setLayout(new FlowLayout());
		panel1.add(IPLabel);
		panel1.add(serverIPTextField);
		panel1.add(userNameLabel);
		panel1.add(userNameTextField);
		panel1.add(passwordLabel);
		panel1.add(passwordTextField);
		panel1.add(connectButton);

		// 将当前目录、上一级目录的标签、输入框和按钮放在面板panel2中
		JPanel panel2 = new JPanel();
		panel2.setLayout(new FlowLayout());
		panel2.add(currentDirLabel);
		panel2.add(currentDirTextField);
		panel2.add(upLevelButton);
		
		JPanel panelA = new JPanel();
		panelA.setLayout(new BorderLayout());
		panelA.add(panel1, BorderLayout.NORTH);
		panelA.add(panel2, BorderLayout.CENTER);

		ftpFileScrollPane1.setBorder(new TitledBorder(BorderFactory
				.createEtchedBorder(Color.white, new Color(134, 134, 134)),
				"FTP服务器上文件信息"));

		// 将下载、上传、断开、退出按钮放在panel3中
		JPanel panel3 = new JPanel();
		panel3.setLayout(new FlowLayout());
		panel3.add(downloadButton);
		panel3.add(uploadButton);
		panel3.add(disconnectButton);
		panel3.add(exitButton);

		// 将任务列表放在有滚动条的面板中
		JScrollPane taskScrollPane = new JScrollPane(taskList);
		taskScrollPane.setBorder(new TitledBorder(BorderFactory
				.createEtchedBorder(Color.white, new Color(134, 134, 134)), "上下载队列"));
		
		// 将控制台信息的文本域放在滚动条面板中，并且设置为不可编辑
		consoleTextArea.setBackground(SystemColor.control);
		consoleTextArea.setEditable(false);
		consoleTextArea.setText("");
		consoleTextArea.setRows(5);
		JScrollPane consoleScrollPane = new JScrollPane(consoleTextArea);
		consoleScrollPane.setBorder(new TitledBorder(BorderFactory
				.createEtchedBorder(Color.white, new Color(134, 134, 134)), "上下载信息"));
		
		JPanel panelB = new JPanel();
		panelB.setLayout(new BorderLayout());
		panelB.add(panel3, BorderLayout.NORTH);
		panelB.add(taskScrollPane, BorderLayout.CENTER);
		panelB.add(consoleScrollPane, BorderLayout.SOUTH);
		
		// 将各个面板添加到主面板中
		this.getContentPane().setLayout(new BorderLayout());
		this.getContentPane().add(panelA, BorderLayout.NORTH);
		this.getContentPane().add(ftpFileScrollPane1, BorderLayout.CENTER);
		this.getContentPane().add(panelB, BorderLayout.SOUTH);
		
		// 为按钮添加事件处理器
		connectButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				connectButton_actionPerformed(e);
			}
		});
		upLevelButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				upLevelButton_actionPerformed(e);
			}
		});
		downloadButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				downloadButton_actionPerformed(e);
			}
		});
		uploadButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				uploadButton_actionPerformed(e);
			}
		});
		disconnectButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				disconnectButton_actionPerformed(e);
			}
		});
		exitButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				exitButton_actionPerformed(e);
			}
		});
		ftpFileInfosTable.addMouseListener(new MainFrame_Table_mouseAdapter(
				this));

	}

	/**
	 * 处理窗口关闭事件
	 */
	protected void processWindowEvent(WindowEvent e) {
		super.processWindowEvent(e);
		if (e.getID() == WindowEvent.WINDOW_CLOSING) {
			disconnection();
			System.exit(0);
		}
	}
	/**
	 * 处理连接按钮发生的事件
	 * @param e
	 */
	void connectButton_actionPerformed(ActionEvent e) {
		// 获得IP、用户名和密码
		ip = serverIPTextField.getText();
		username = userNameTextField.getText();
		if (username.equals("")){
			username = "anonymous";
		}
		password = passwordTextField.getText();
		if (password.equals("")){
			password = "anonymous";
		}
		if (ip.equals(""))
			return;

		try {
			// 连接服务器
			Connector conn = new Connector(this, ip, username, password);
			conn.start();
		} catch (Exception ee) {
		}
	}

	/**
	 * 转入上一级目录按钮事件处理
	 * @param e
	 */
	void upLevelButton_actionPerformed(ActionEvent e) {
		upDirectory();
	}

	/**
	 * 下载按钮事件处理
	 * @param e
	 */
	void downloadButton_actionPerformed(ActionEvent e) {
		try {
			// 获得被表格中被选择的文件名
			String str = (String) files.elementAt(row);
			// 如果被选择的是一个文件，则下载。
			String t = (String) fileTypes.elementAt(row);
			if (t.startsWith("-")){
				// 表明是个文件类型
				download(str, "");
			}
		} catch (Exception ee) {
			consoleTextArea.append("file download has problems!\n");
		}

	}
	/**
	 * 上传按钮事件处理
	 * @param e
	 */
	void uploadButton_actionPerformed(ActionEvent e) {
		upload();

	}
	/**
	 * 断开连接按钮事件处理
	 * @param e
	 */
	void disconnectButton_actionPerformed(ActionEvent e) {
		disconnection();
	}

	/**
	 * 退出FTP客户端按钮事件处理
	 * @param e
	 */
	void exitButton_actionPerformed(ActionEvent e) {
		System.exit(0);
	}

	/**
	 * 上传文件到FTP
	 */
	void upload() {
		try {
			// 显示上传文件的对话框
			openFileDialog.show();
			String directory = openFileDialog.getDirectory();
			if (directory == null || directory.equals("")){
				return;