compressjpanel.java

基于哈夫曼树的压缩解压程序源代码

package GUI;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import logical.Compress;

public class CompressJPanel {
	/**
	 * The Panel for the compress function
	 */
	private static final long serialVersionUID = 1L;

	// The name of the compressed file
	private JTextField textFieldOfCompress;

	// The name of the target file
	private JTextField textFieldOfCompressTo;

	// Show the status of the process
	private JTextArea compressStatusArea;

	private JPanel panel1, panel2, panel3;

	private JButton button1, button2;

	CompressJPanel() {
		init();
	}

	@SuppressWarnings("deprecation")
	private void init() {
		// The panel1 contains the components which determine the file
		// compressed
		JLabel label1 = new JLabel("Choose source:");
		button1 = new JButton("Select...");
		button1.setEnabled(false);
		textFieldOfCompress = new JTextField();
		textFieldOfCompress.setBackground(Color.white);
		textFieldOfCompress.setEditable(false);
		panel1 = new JPanel();
		panel1.setLayout(new BorderLayout(10, 10));
		panel1.add(label1, BorderLayout.WEST);
		panel1.add(button1, BorderLayout.EAST);
		panel1.add(textFieldOfCompress, BorderLayout.SOUTH);

		// The panel2 contains the components which determine the folder which
		// the file is compressed to
		JLabel label2 = new JLabel("Compress to:");
		button2 = new JButton("Compress to...");
		button2.setEnabled(false);
		textFieldOfCompressTo = new JTextField();
		textFieldOfCompressTo.setBackground(Color.white);
		textFieldOfCompressTo.setEditable(false);
		panel2 = new JPanel();
		panel2.setLayout(new BorderLayout(10, 10));
		panel2.add(label2, BorderLayout.WEST);
		panel2.add(button2, BorderLayout.EAST);
		panel2.add(textFieldOfCompressTo, BorderLayout.SOUTH);

		// panel3 contains the components which are used to control the process
		// and show the status
		JLabel label3 = new JLabel("Status:");
		compressStatusArea = new JTextArea();
		compressStatusArea.setBackground(Color.LIGHT_GRAY);
		compressStatusArea.setEditable(false);
		compressStatusArea.setText("PREPARE TO COMPRESS");
		JPanel panel31 = new JPanel();
		panel31.setLayout(new GridLayout(2, 1, 10, 10));
		panel31.add(label3);
		panel31.add(compressStatusArea);

		// Control the pattern of the compress
		JLabel label4 = new JLabel("mode");
		JButton button3 = new JButton("OK");
		JRadioButton folderOrFile = new JRadioButton("Single File");
		JRadioButton folder = new JRadioButton("Single Folder (Unfinished)");
		ButtonGroup group = new ButtonGroup();
		group.add(folderOrFile);
		group.add(folder);
		folderOrFile.setSelected(false);
		folder.setSelected(false);

		ButtonListener listener = new ButtonListener();
		folderOrFile.addActionListener(listener);
		folder.addActionListener(listener);

		JPanel panel32 = new JPanel();
		panel32.setLayout(new GridLayout(4, 1, 10, 10));
		panel32.add(label4);
		panel32.add(folderOrFile);
		panel32.add(folder);
		panel32.add(button3);
		panel3 = new JPanel();
		panel3.setLayout(new GridLayout(1, 2, 10, 10));
		panel3.add(panel31);
		panel3.add(panel32);

		// the actionListener for compress Panel
		ButtonListener btListener1 = new ButtonListener();
		button1.addActionListener(btListener1);
		button2.addActionListener(btListener1);
		button3.addActionListener(btListener1);
	}

	public JPanel getDefaultJPanel() {
		// construct the panel of the compression
		JPanel compressPanel = new JPanel();
		JPanel p1 = new JPanel();
		p1.setLayout(new GridLayout(2, 1, 20, 20));
		p1.add(panel1);
		p1.add(panel2);
		compressPanel.setLayout(new GridLayout(2, 1, 20, 20));
		compressPanel.add(p1);
		compressPanel.add(panel3);
		return compressPanel;
	}

	String compressFile, compressToFile;// The name of the 2 files

	String f1;// The path

	String fileName = "";

	int mode;

	private class ButtonListener implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			if (e.getActionCommand().equals("Select...")) {
				// Get the name of the compressed file and show the default path
				mode = JFileChooser.FILES_ONLY;
				if ((compressFile = showLoad()) != null) {
					textFieldOfCompress.setText(compressFile);
					f1 = compressFile + "~";
					textFieldOfCompressTo.setText(f1);
				}
				button2.setEnabled(true);
			} else if (e.getActionCommand().equals("Compress to...")) {
				// Get the path of the compression and the name of the file
				// which is the target file

				mode = JFileChooser.DIRECTORIES_ONLY;
				if ((compressToFile = showLoad()) != null)
					textFieldOfCompressTo.setText(compressToFile + "\\"
							+ fileName + "~");
			} else if (e.getActionCommand().equals("OK")) {
				try {
					long start = System.currentTimeMillis();
					new Compress(textFieldOfCompress.getText(),
							textFieldOfCompressTo.getText());
					long end = System.currentTimeMillis();
					compressStatusArea.setText("COMPRESS DONE!\n"
							+ "COMPRESS TIME IS " + (end - start) + "Millis");
				} catch (Exception ex) {
				}

			} else if (e.getActionCommand().equals("Single File")) {
				button1.setEnabled(true);
			} else if (e.getActionCommand().equals("Single Folder (Unfinished)")) {
				button1.setEnabled(true);
			}
		}
	}

	// Show the choices
	private String showLoad() {
		JFileChooser file = new JFileChooser();
		file.setFileSelectionMode(mode);
		file.showSaveDialog(new JPanel());
		File result = file.getSelectedFile();
		if (mode == JFileChooser.FILES_ONLY)
			fileName = result.getName();
		return result.getPath();
	}

}