package com.vitamin.UI;import javax.swing.*;import javax.swing.filechooser.FileFilter;import java.awt.BorderLayout;import java.awt.Container;import java.awt.GridLayout;import java.awt.event.*;import java.io.File;import java.io.FileWriter;import java.io.IOException;import com.vitamin.Console.*;public class FileTest extends JFrame
{
private JButton btnOpen = new JButton("Open"); private JButton btnSave = new JButton("Save"); private JPanel p = null; private JTextField tfDir = new JTextField(); private JTextField tfFileName = new JTextField(); private JScrollPane sp = new JScrollPane(); private JEditorPane ep = new JEditorPane(); private File file = null; public FileTest() 
{ super(); // TODO Auto-generated constructor stub this.initForm();
} public void initForm() { Container con = this.getContentPane(); con.setLayout(new BorderLayout()); this.tfDir.setEditable(false); this.tfFileName.setEditable(false); this.btnSave.setEnabled(false); this.btnOpen.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { JFileChooser fc = new JFileChooser(); fc.setFileFilter(new TextFileFilter() ); int returnVal = fc.showOpenDialog(FileTest.this); if(returnVal == JFileChooser.APPROVE_OPTION) { file = fc.getSelectedFile(); try { ep.setPage(file.toURL()); tfFileName.setText(file.getAbsolutePath()); btnSave.setEnabled(true); } catch(IOException ex) { throw new RuntimeException(ex); } } else if(returnVal == JFileChooser.CANCEL_OPTION) { tfFileName.setText("你已经取消了文件的选择"); } } }); this.btnSave.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { try { FileWriter fw = new FileWriter(file); ep.write(fw); JOptionPane.showMessageDialog(FileTest.this,"保存成功"); } catch (IOException ioe) { throw new RuntimeException(ioe); } } }); sp.getViewport().add(ep); p = new JPanel(); p.add(this.btnOpen); p.add(this.btnSave); con.add(p,BorderLayout.SOUTH); con.add(sp,BorderLayout.CENTER); p = new JPanel(); p.setLayout(new GridLayout(2,1)); p.add(this.tfDir); p.add(this.tfFileName); con.add(p,BorderLayout.NORTH); console.run(this,400,400); } public class TextFileFilter extends javax.swing.filechooser.FileFilter { public boolean accept(File f) { return f.getName().endsWith(".txt") || f.isDirectory(); } public String getDescription() { return "Text Files (*.txt)"; } } /**//** * @param args */ public static void main(String[] args) { FileTest ft = new FileTest(); }
}做了个读写文件的小东西，功能很烂，有时间做个完整的记事本吧。