Java记事本

ClipUtil.javapackage com.mingrisoft.notebook;import java.awt.Toolkit;import java.awt.datatransfer.Clipboard;import java.awt.datatransfer.DataFlavor;import java.awt.datatransfer.StringSelection;import java.awt.datatransfer.Transferable;public class ClipUtil {private Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard(); //获取Clipboard 对象public void setData(String data) { //定义复制数据方法cb.setContents(new StringSelection(data), null); //实现数据复制}public String getData() { //定义数据粘贴方法Transferable content = cb.getContents(null); //调用getContents()方法实现数据粘贴try {return (String) content.getTransferData(DataFlavor.stringFlavor); //返回剪贴板中的数据} catch (Exception e) {return null;}}}FristNoteBook.javapackage com.mingrisoft.notebook;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.UIManager;import javax.swing.filechooser.FileFilter;public class FristNoteBook extends JFrame {private JTextArea filetextArea;/*** Launch the application** @param args*/String name = null;public static void main(String args[]) {EventQueue.invokeLater(new Runnable() {public void run() {try {UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());FristNoteBook frame = new FristNoteBook();frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}/*** Create the frame*/public FristNoteBook() {super();setTitle("记事本");getContentPane().setLayout(null);setBounds(100, 100, 412, 324);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JMenuBar jmBar = new JMenuBar();this.setJMenuBar(jmBar);JMenu fileMenu = new JMenu("文件");JMenu editeMenu = new JMenu("编辑");JMenu helpMenu = new JMenu("帮助");jmBar.add(fileMenu);jmBar.add(editeMenu);jmBar.add(helpMenu);JMenuItem newFile = new JMenuItem("新建");newFile.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {filetextArea.setText(""); // 实现将文本域中的内容清空}});JMenuItem openFile = new JMenuItem("打开"); //定义"打开菜单项"openFile.addActionListener(new ActionListener() { //绑定单击事件public void actionPerformed(final ActionEvent e) {openFile(e); //调用openFile()方法BufferedReader br; //创建BufferedReader对象try {if (name != null) { //如果String对象不为空br = new BufferedReader(new FileReader(name)); //实例化BufferedReader对象StringBuffer sb = new StringBuffer(); //定义字符创生成器对象String aline;while ((aline = br.readLine()) != null) { //循环读取流中数据sb.append(aline + '\n'); //向字符串生成器中追加内容}br.close(); //将流关闭filetextArea.setText(sb.toString()); //将读取内容，设置为文本域内容}} catch (Exception e1) {e1.printStackTrace();}}});JMenuItem saveFile = new JMenuItem("保存");saveFile.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {MyFileChooser myFileChooser = new MyFileChooser(); //创建包含有保存文件对话框的MyFileChooser类对象myFileChooser.getFileChooser(); //调用该类的获取保存文件对话框方法BufferedWriter bw; //创建BufferedWriter对象try {bw = new BufferedWriter(new FileWriter(myFileChooser.getPath())); //根据用户选择地址，实例化BufferedWriter对象bw.write(filetextArea.getText()); //将文本域中内容写入流中bw.close(); //将流关闭} catch (Exception e1) {e1.printStackTrace();}}});JMenuItem exit = new JMenuItem("退出");exit.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {System.exit(0);}});fileMenu.add(newFile);fileMenu.add(openFile);fileMenu.add(saveFile);fileMenu.add(exit);JMenuItem copeEdite = new JMenuItem("复制");copeEdite.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {ClipUtil clipUtil = new ClipUtil(); //创建ClipUtil对象clipUtil.setData(filetextArea.getText()); //调用复制数据方法}});JMenuItem cutEdite = new JMenuItem("剪切");cutEdite.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {ClipUtil clipUtil = new ClipUtil();clipUtil.setData(filetextArea.getSelectedText()); //调用复制数据方法filetextArea.replaceRange("", filetextArea.getSelectionStart(),filetextArea.getSelectionEnd()); //将选中数据用空字符串替换}});JMenuItem stickEdite = new JMenuItem("粘贴");stickEdite.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {ClipUtil clipUtil = new ClipUtil();String str = clipUtil.getData(); //调用粘贴数据方法filetextArea.replaceRange(str,filetextArea.getSelectionStart(), filetextArea.getSelectionEnd()); //设置文本域中数据}});JMenuItem allEdite = new JMenuItem("全选");allEdite.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {filetextArea.setSelectionStart(0); //设置文本域中选定文本的开始位置filetextArea.setSelectionEnd(filetextArea.getText().length()); //设置文本域中选定文本的结束位置}});editeMenu.add(copeEdite);editeMenu.add(cutEdite);editeMenu.add(stickEdite);editeMenu.add(allEdite);JMenuItem heplEdite = new JMenuItem("关于记事本");heplEdite.addActionListener(new ActionListener() {public void actionPerformed(final ActionEvent e) {MyAbout myAbout = new MyAbout();myAbout.setVisible(true);}});helpMenu.add(heplEdite);final JScrollPane scrollPane = new JScrollPane();scrollPane.setBounds(0, 0, 404, 265);getContentPane().add(scrollPane);filetextArea = new JTextArea();scrollPane.setViewportView(filetextArea);}void openFile(ActionEvent e) {JFileChooser chooser = new JFileChooser(); // 用户选择文件的简单机制chooser.setCurrentDirectory(new File(".")); // 当前文件的目录chooser.addChoosableFileFilter(new FileFilter() { //添加文件选择过滤器public boolean accept(File f) { //只允许返回txt格式的文件return f.getName().toLowerCase().endsWith(".txt")|| f.isDirectory();}public String getDescription() { //在文件格式列表中显示txt return "txt(*.txt)";}});int r = chooser.showOpenDialog(this);if (r == JFileChooser.APPROVE_OPTION) {name = chooser.getSelectedFile().getPath();}}}MyAbout.javapackage com.mingrisoft.notebook;import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class MyAbout extends JFrame {/*** Launch the application* @param args*/public static void main(String args[]) {EventQueue.invokeLater(new Runnable() {public void run() {try {MyAbout frame = new MyAbout();frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}/*** Create the frame*/public MyAbout() { //构造方法中设置窗体布局super();setTitle("关于记事本");setBounds(100, 100, 343, 222);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);final JPanel panel = new JPanel();panel.setLayout(null);getContentPane().add(panel, BorderLayout.CENTER);final JLabel label = new JLabel();label.setText("本程序JDK版本是1.6，开发工具为Eclipse，");label.setBounds(29, 41, 256, 46);panel.add(label);final JLabel label_1 = new JLabel();label_1.setText("主要通过IO流技术实现。