fileoperator.java

这是一个用java编写类似于notepad文件编辑器

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileView;

/*
 * Created on 2004-3-13
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */

/**
 * @author Administrator
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FileOperator {
	public static void main(String args[]) throws IOException {
		Toolkit kit = Toolkit.getDefaultToolkit();
		AppFrame frame = new AppFrame();
		frame.setIconImage(kit.getImage("app.gif"));
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();

	}
}

class AppFrame extends JFrame {
	JTextArea textarea;
	String directory; // 在FileDialog中显示的默认目录
	JFileChooser chooser;
	JLabel label;
	int dWIDTH = 400, dHEIGHT = 300;

	AboutDialog dialog;
	HelpDialog dialog2;

	static void WriteError(IOException e) throws IOException {
		File log = new File("error.log");
		FileWriter fw = new FileWriter(log);
		BufferedWriter bw = new BufferedWriter(fw);
		bw.write(e.toString());
	}

	  void CopyFile() throws IOException {
		JFileChooser chooser = new JFileChooser();
		String from = new String();
		String to = new String();

		int r1 = chooser.showOpenDialog(null);
		//if file selected,set it as icon of the label
		if (r1 == JFileChooser.APPROVE_OPTION) {
			from = chooser.getSelectedFile().getPath();
		}
		 
		File f1 = new File(from);
		boolean isfile1 = f1.isFile(), retry;
		retry = false;
		if (!isfile1) {
			JOptionPane.showMessageDialog(this, "复制失败!");
		 	retry = true;
		}
		if (!retry) {
			int r2 = chooser.showSaveDialog(null);
			if (r2 == JFileChooser.APPROVE_OPTION) {
				to = chooser.getSelectedFile().getPath();
			}

		}
		FileCopy.copy(from, to);
	}

	 void DeleteFile() throws IOException {
		JFileChooser chooser = new JFileChooser();
		String filename = new String();
		int r1 = chooser.showOpenDialog(null);
		//if file selected,set it as icon of the label
		if (r1 == JFileChooser.APPROVE_OPTION) {
			filename = chooser.getSelectedFile().getPath();
		}
		File f = new File(filename);
		boolean isfile = f.isFile();

		if (!isfile) {
			JOptionPane.showMessageDialog(this, "删除失败!");

		}
		Delete.delete(filename);
	}
	  void ZipFile() throws IOException {

		JFileChooser chooser = new JFileChooser();
		String from = new String();
		int r1 = chooser.showOpenDialog(null);
		//if file selected,set it as icon of the label
		if (r1 == JFileChooser.APPROVE_OPTION) {
			from = chooser.getSelectedFile().getPath();
		}
		String to = new String();
		File f1 = new File(from);

		boolean isfile1 = f1.isFile(), isdrectory = f1.isDirectory(), retry;
		retry = false;
		if (!isfile1 && !isdrectory) {
			JOptionPane.showMessageDialog(this, "压缩失败!");
			retry = true;
			//ZipFile();
		}
		if (!retry) {
			int r2 = chooser.showSaveDialog(null);
			if (r2 == JFileChooser.APPROVE_OPTION) {
				to = chooser.getSelectedFile().getPath();
			}

			if (isdrectory)
				to = from + ".zip";
			else
				to = from + ".gz";
			if (new File(to).exists()) {
				JOptionPane.showMessageDialog(new AppFrame(), "有同名文件!");
				retry = true;
				ZipFile();
			}

			Compress.gzipFile(from, to);
		}

		Compress.gzipFile(from, to);
	}

	void ViewFile() {
		ViewFrame frame = new ViewFrame();

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	}

	void SetFile(int width,int height)throws IOException {
		
		/*SetFrame frame = new SetFrame();
		
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
		 */
		dWIDTH=width;
		dHEIGHT=height;
		
	 	FileWriter fw=new FileWriter(fi);
	 	BufferedWriter bw=new BufferedWriter(fw);
		bw.write(new Integer(width).toString());
		bw.newLine();
		bw.write(new Integer(height).toString());
		bw.close();
		this.setSize(dWIDTH,dHEIGHT);
	}
	final File fi=new File("config.conf");	 
	public AppFrame() throws IOException {
		
		super("FileOperator-made By SongLei(020439)");
 	
		
		try {
		FileReader fin = new FileReader(fi);
		BufferedReader br = new BufferedReader(fin);	
		dWIDTH = Integer.parseInt(br.readLine());
		dHEIGHT = Integer.parseInt(br.readLine());
		} catch (IOException e) {
		}
		catch(NumberFormatException e2){
			dWIDTH=700;
			dHEIGHT=500;
		}
 
		setSize(dWIDTH, dHEIGHT);

		//建立菜单
		JMenuBar menuBar = new JMenuBar();
		setJMenuBar(menuBar);
		JMenu filemenu = new JMenu("文件");
		menuBar.add(filemenu);
		JMenu picmenu = new JMenu("图象");
		menuBar.add(picmenu);
		JMenu setmenu = new JMenu("设置");
		menuBar.add(setmenu);
		JMenu aboutmenu = new JMenu("关于");
		menuBar.add(aboutmenu);
		JPanel myPanel = new JPanel();
		myPanel.setLayout(null);
		Container contentPane = getContentPane();
		contentPane.add(myPanel);
		myPanel.setBackground(Color.pink);

		//用一个LABEL来显示图片
		label = new JLabel();
		label.setBounds(10,10,100,100);
		myPanel.add(label);
		JLabel label2 = new JLabel();
		myPanel.add(label2, BorderLayout.CENTER);
		
		ImageIcon im = new ImageIcon("1.gif");
		label2.setIcon(im);
		label2.setText("Welcome to my App");
		label2.setBounds(10,200,800,35);
		chooser = new JFileChooser();
		chooser.setCurrentDirectory(new File("."));

		//accept all image files ending with .jpg .jpeg .gif
		final ExtensionFileFilter filter = new ExtensionFileFilter();

		filter.addExtension("jpg");
		filter.addExtension("jpeg");
		filter.addExtension("gif");
		filter.setDescription("Image files");
		chooser.setFileFilter(filter);

		chooser.setAccessory(new ImagePreviewer(chooser));

		JMenuItem openItem = new JMenuItem("打开", new ImageIcon("open.gif"));
		picmenu.add(openItem);
		openItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int r = chooser.showOpenDialog(null);

				//if file selected,set it as icon of the label
				if (r == JFileChooser.APPROVE_OPTION) {
					String name = chooser.getSelectedFile().getPath();
					ImageIcon im = new ImageIcon(name);
					im.getImage().getScaledInstance(
						im.getIconWidth() * 2,
						im.getIconHeight() * 2,
						Image.SCALE_DEFAULT);
					label.setIcon(im);
					label.setText(chooser.getSelectedFile().getName());

				}
			}
		});
		JMenuItem copyItem = new JMenuItem("复制", new ImageIcon("copy.gif"));
		filemenu.add(copyItem);
		copyItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					CopyFile();
				} catch (IOException err) {
				}
			}
		});

		JMenuItem deleteItem = new JMenuItem("删除", new ImageIcon("delete.gif"));
		filemenu.add(deleteItem);
		deleteItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					DeleteFile();
				} catch (IOException err) {
				}
			}
		});

		JMenuItem zipItem = new JMenuItem("压缩", new ImageIcon("zip.gif"));
		filemenu.add(zipItem);
		zipItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					ZipFile();
				} catch (IOException err) {
				}
			}
		});

		

		JMenuItem lookItem = new JMenuItem("查看", new ImageIcon("view.gif"));
		filemenu.add(lookItem);
		lookItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				ViewFile();
			}
		});
		
		JMenuItem exitItem = new JMenuItem("Exit", new ImageIcon("exit.gif"));
		filemenu.add(exitItem);
		exitItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});

		JMenuItem setItem1 = new JMenuItem("设置300*400", new ImageIcon("set.gif"));
		setmenu.add(setItem1);
		setItem1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
			try{	
				SetFile(300,400);
			}catch(IOException err){}
			}
		});
		
		JMenuItem setItem2 = new JMenuItem("设置600*800", new ImageIcon("set.gif"));
			setmenu.add(setItem2);
			setItem2.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
				try{	
					SetFile(600,800);
				}catch(IOException err){}
				}
			});