mp3文件的tag查看程序

闲着无聊,想分类我本机的mp3文件,先写个查看程序,分类慢慢写.

无图无真相,还是上图吧,简易的,很多问题没有处理.

 

 

 

package com.javaeye.i2534;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Rectangle;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import javax.swing.BorderFactory;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.TitledBorder;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileSystemView;

/**
 * 
 * @author lan
 * 
 */
public class MP3TagViewer extends JFrame {

	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JPanel jPanel = null;
	private JLabel pathLabel = null;
	private JTextField pathTextField = null;
	private JButton browseButton = null;
	private JScrollPane jScrollPane = null;
	private JPanel jPanel1 = null;
	private JList fileList = null;
	private JLabel nameLabel = null;
	private JLabel artistLabel = null;
	private JLabel albumLabel = null;
	private JLabel yearLabel = null;
	private JLabel commentLabel = null;
	private JTextField nameTextField = null;
	private JTextField artistTextField = null;
	private JTextField albumTextField = null;
	private JTextField yearTextField = null;
	private JTextArea commentTextArea = null;

	/**
	 * This is the default constructor
	 */
	public MP3TagViewer() {
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setSize(560, 396);
		this.setContentPane(getJContentPane());
		this.setTitle("MP3管理工具");
	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
			jContentPane.add(getJPanel(), BorderLayout.CENTER);
		}
		return jContentPane;
	}

	/**
	 * This method initializes jPanel
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJPanel() {
		if (jPanel == null) {
			pathLabel = new JLabel();
			pathLabel.setBounds(new Rectangle(36, 21, 54, 24));
			pathLabel.setHorizontalAlignment(SwingConstants.RIGHT);
			pathLabel.setText("文件夹");
			jPanel = new JPanel();
			jPanel.setLayout(null);
			jPanel.add(pathLabel, null);
			jPanel.add(getPathTextField(), null);
			jPanel.add(getBrowseButton(), null);
			jPanel.add(getJScrollPane(), null);
			jPanel.add(getJPanel1(), null);
		}
		return jPanel;
	}

	/**
	 * This method initializes pathTextField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getPathTextField() {
		if (pathTextField == null) {
			pathTextField = new JTextField();
			pathTextField.setBounds(new Rectangle(112, 20, 311, 26));
		}
		return pathTextField;
	}

	/**
	 * This method initializes browseButton
	 * 
	 * @return javax.swing.JButton
	 */
	private JButton getBrowseButton() {
		if (browseButton == null) {
			browseButton = new JButton();
			browseButton.setBounds(new Rectangle(438, 21, 62, 22));
			browseButton.setText("浏览");
			browseButton.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					JFileChooser chooser = new JFileChooser(FileSystemView
							.getFileSystemView());
					chooser
							.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
					chooser.addChoosableFileFilter(new FileFilter() {

						@Override
						public boolean accept(File f) {
							if (f.isDirectory()) {
								return true;
							} else if (f.isFile()) {
								return f.getName().toLowerCase().endsWith(
										".mp3");
							}
							return false;
						}

						@Override
						public String getDescription() {
							return "MP3 (.mp3)";
						}

					});
					if (chooser.showOpenDialog(MP3TagViewer.this) == JFileChooser.APPROVE_OPTION) {
						File dir = chooser.getSelectedFile();
						getPathTextField().setText(dir.getAbsolutePath());
						Set<File> set = new HashSet<File>();
						walk(dir, set);
						DefaultListModel model = (DefaultListModel) getFileList()
								.getModel();
						model.clear();
						for (File f : set) {
							model.addElement(new FileWrapper(f));
						}
					}
				}
			});
		}
		return browseButton;
	}

	private class FileWrapper {
		File file;

		public FileWrapper(File file) {
			this.file = file;
		}

		@Override
		public String toString() {
			return file.getName();
		}
	}

	private class Info {

		private final Charset GBK = Charset.forName("GBK");
		// 应该是128位
		private byte[] tag;

		public Info(byte[] tag) throws IllegalArgumentException {
			this.tag = tag;
			if (this.tag.length != 128) {
				throw new IllegalArgumentException();
			}
			if (!isValid()) {
				throw new IllegalArgumentException();
			}
		}

		private boolean isValid() {
			byte[] array = Arrays.copyOfRange(this.tag, 0, 3);
			String s = new String(array, GBK);
			return "TAG".equals(s);
		}

		public String getArtist() {
			return getString(33, 63);
		}

		public String getAlbum() {
			return getString(63, 93);
		}

		public String getName() {
			return getString(3, 33);
		}

		public String getYear() {
			return getString(93, 97);
		}

		public String getComment() {
			return getString(97, 125);
		}

		private String getString(int from, int to) {
			byte[] array = Arrays.copyOfRange(this.tag, from, to);
			int length = 0;
			for (byte b : array) {
				if (b != 0) {
					length++;
				} else {
					break;
				}
			}
			return new String(array, 0, length, GBK);
		}
	}

	private void walk(File file, Collection<File> files) {
		if (file.isHidden()) {
			return;
		}
		if (file.isDirectory()) {
			for (File f : file.listFiles()) {
				this.walk(f, files);
			}
		} else if (file.isFile()) {
			if (file.getName().toLowerCase().endsWith(".mp3")) {
				files.add(file);
			}
		}
	}

	/**
	 * This method initializes jScrollPane
	 * 
	 * @return javax.swing.JScrollPane
	 */
	private JScrollPane getJScrollPane() {
		if (jScrollPane == null) {
			jScrollPane = new JScrollPane();
			jScrollPane.setBounds(new Rectangle(23, 75, 197, 265));
			jScrollPane.setViewportView(getFileList());
			jScrollPane.setBorder(BorderFactory.createTitledBorder(null,
					"MP3\u5217\u8868", TitledBorder.DEFAULT_JUSTIFICATION,
					TitledBorder.DEFAULT_POSITION, new Font("Dialog",
							Font.BOLD, 12), new Color(51, 51, 51)));
		}
		return jScrollPane;
	}

	/**
	 * This method initializes jPanel1
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJPanel1() {
		if (jPanel1 == null) {
			commentLabel = new JLabel();
			commentLabel.setBounds(new Rectangle(25, 190, 50, 20));
			commentLabel.setText("信息");
			yearLabel = new JLabel();
			yearLabel.setBounds(new Rectangle(25, 150, 50, 20));
			yearLabel.setText("年代");
			albumLabel = new JLabel();
			albumLabel.setBounds(new Rectangle(25, 110, 50, 20));
			albumLabel.setText("专辑");
			artistLabel = new JLabel();
			artistLabel.setBounds(new Rectangle(25, 70, 50, 20));
			artistLabel.setText("演唱");
			nameLabel = new JLabel();
			nameLabel.setBounds(new Rectangle(25, 30, 50, 20));
			nameLabel.setText("名称");
			jPanel1 = new JPanel();
			jPanel1.setLayout(null);
			jPanel1.setBounds(new Rectangle(257, 75, 256, 264));
			jPanel1.setBorder(BorderFactory.createTitledBorder(null,
					"MP3\u4fe1\u606f", TitledBorder.DEFAULT_JUSTIFICATION,
					TitledBorder.DEFAULT_POSITION, new Font("Dialog",
							Font.BOLD, 12), new Color(51, 51, 51)));
			jPanel1.add(nameLabel, null);
			jPanel1.add(artistLabel, null);
			jPanel1.add(albumLabel, null);
			jPanel1.add(yearLabel, null);
			jPanel1.add(commentLabel, null);
			jPanel1.add(getNameTextField(), null);
			jPanel1.add(getArtistTextField(), null);
			jPanel1.add(getAlbumTextField(), null);
			jPanel1.add(getYearTextField(), null);
			jPanel1.add(getCommentTextArea(), null);
		}
		return jPanel1;
	}

	/**
	 * This method initializes fileList
	 * 
	 * @return javax.swing.JList
	 */
	private JList getFileList() {
		if (fileList == null) {
			fileList = new JList(new DefaultListModel());
			fileList
					.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
						public void valueChanged(
								javax.swing.event.ListSelectionEvent e) {
							if (e.getValueIsAdjusting()) {
								Object o = fileList.getSelectedValue();
								if (o instanceof FileWrapper) {
									File f = ((FileWrapper) o).file;
									RandomAccessFile raf = null;
									try {
										raf = new RandomAccessFile(f, "r");
										byte[] array = new byte[128];
										raf.seek(raf.length() - 128);
										raf.read(array);
										Info info = new Info(array);

										getNameTextField().setText(
												info.getName());
										getArtistTextField().setText(
												info.getArtist());
										getAlbumTextField().setText(
												info.getAlbum());
										getYearTextField().setText(
												info.getYear());
										getCommentTextArea().setText(
												info.getComment());
									} catch (FileNotFoundException e1) {
										e1.printStackTrace();
									} catch (IOException e1) {
										e1.printStackTrace();
									} catch (IllegalArgumentException e1) {
										e1.printStackTrace();
									} finally {
										if (raf != null) {
											try {
												raf.close();
											} catch (IOException e1) {
												e1.printStackTrace();
											}
										}
									}
								}
							}
						}
					});
		}
		return fileList;
	}

	/**
	 * This method initializes nameTextField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getNameTextField() {
		if (nameTextField == null) {
			nameTextField = new JTextField();
			nameTextField.setBounds(new Rectangle(95, 30, 130, 20));
			nameTextField.setEditable(false);
		}
		return nameTextField;
	}

	/**
	 * This method initializes artistTextField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getArtistTextField() {
		if (artistTextField == null) {
			artistTextField = new JTextField();
			artistTextField.setBounds(new Rectangle(95, 70, 130, 20));
			artistTextField.setEditable(false);
		}
		return artistTextField;
	}

	/**
	 * This method initializes albumTextField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getAlbumTextField() {
		if (albumTextField == null) {
			albumTextField = new JTextField();
			albumTextField.setBounds(new Rectangle(95, 110, 130, 20));
			albumTextField.setEditable(false);
		}
		return albumTextField;
	}

	/**
	 * This method initializes yearTextField
	 * 
	 * @return javax.swing.JTextField
	 */
	private JTextField getYearTextField() {
		if (yearTextField == null) {
			yearTextField = new JTextField();
			yearTextField.setBounds(new Rectangle(95, 150, 130, 20));
			yearTextField.setEditable(false);
		}
		return yearTextField;
	}

	/**
	 * This method initializes commentTextArea
	 * 
	 * @return javax.swing.JTextArea
	 */
	private JTextArea getCommentTextArea() {
		if (commentTextArea == null) {
			commentTextArea = new JTextArea();
			commentTextArea.setBounds(new Rectangle(95, 190, 130, 60));
			commentTextArea.setEditable(false);
			commentTextArea.setEnabled(true);
			commentTextArea.setLineWrap(true);
		}
		return commentTextArea;
	}

	public static void main(String[] args) {
		MP3TagViewer m = new MP3TagViewer();
		m.setLocationRelativeTo(null);
		m.setVisible(true);
	}

} // @jve:decl-index=0:visual-constraint="10,10"