Java仿Windows记事本源代码分享

Java仿Windows记事本源代码分享

本文实例为大家分享了java仿Windows记事本的具体代码，供大家参考，具体内容如下

先上截图：

源代码：

import java.awt.*;

import javax.swing.*;

import javax.swing.filechooser.FileNameExtensionFilter;

import javax.swing.undo.UndoManager;

import java.awt.event.*;

import java.io.*;

/**

*

* @author cjbi@outlook.com

* @created 2015年7月6日 上午11:22:24

*/

public class JNotepad extends JFrame implements ActionListener {

JMenuBar menubar = new JMenuBar();

JMenu file = new JMenu("文件(F)");

JMenu edit = new JMenu("编辑(E)");

JMenu format = new JMenu("格式(O)");

JMenu help = new JMenu("帮助(H)");

JMenuItem create = new JMenuItem("新建");

JMenuItem open = new JMenuItem("打开...");

JMenuItem save = new JMenuItem("保存");

JMenuItem saveAs = new JMenuItem("另存为...");

JMenuItem exit = new JMenuItem("退出");

JMenuItem undo = new JMenuItem("撤销");

JMenuItem cut = new JMenuItem("剪切");

JMenuItem copy = new JMenuItem("复制");

BrPgvW JMenuItem paste = new JMenuItem("粘贴");

JMenuItem findRep = new JMenuItem("查找替换");

JMenuItem selectAll = new JMenuItem("全选");

JMenuItem font = new JMenuItem("字体");

JMenuItem about = new JMenuItem("关于");

JMenuItem cut2 = new JMenuItem("剪切(X)");

JMenuItem copy2 = new JMenuItem("复制(C)");

JMenuItem paste2 = new JMenuItem("粘贴(V)");

JMenuItem selectAll2 = new JMenuItem("全选(A)");

public static JTextArea textarea = new JTextArea();

UndoManager um = new UndoManager();

jscrollPane scroll = new JScrollPane(textarea, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

JPopupMenu popup = new JPopupMenu();

String pathSelect;

// 获取屏幕尺寸

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

public JNotepad() {

// 此处定义键盘快捷键

// MenuBar

file.setMnemonic(KeyEvent.VK_F);

edit.setMnemonic(KeyEvent.VK_E);

format.setMnemonic(KeyEvent.VK_O);

help.setMnemonic(KeyEvent.VK_H);

// MenuItem

create.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));

open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));

save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));

undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, ActionEvent.CTRL_MASK));

cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));

copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK));

paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK));

findRep.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, ActionEvent.CTRL_MASK));

selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, ActionEvent.CTRL_MASK));

// 事件监听者

save.addActionListener(this);

create.addActionListener(this);

open.addActionListener(this);

saveAs.addActionListener(this);

exit.addActionListener(this);

undo.addActionListener(this);

cut.addActionListener(this);

copy.addActionListener(this);

paste.addActionListener(this);

selectAll.addActionListener(this);

font.addActionListener(this);

about.addActionListener(this);

cut2.addActionListener(this);

copy2.addActionListener(this);

paste2.addActionListener(this);

selectAll2.addActionListener(this);

findRep.addActionListener(this);

// 设置撤销文本的管理器

textarea.getDocument().addUndoableEditListener(um);

textarea.setFont(Format.font);

// 文件

file.add(create);

file.add(open);

file.add(save);

file.add(saveAs);

file.addSeparator();

file.add(exit);

// 编辑

edit.add(undo);

edit.addSeparator();

edit.add(cut);

edit.add(copy);

edit.add(paste);

edit.addSeparator();

edit.add(findRep);

edit.addSeparator();

edit.add(selectAll);

// 格式

format.add(font);

// 帮助

help.add(about);

// 菜单栏

menubar.add(file);

menubar.add(edit);

menubar.add(format);

menubar.add(help);

// 右键菜单

popup.add(cut2);

popup.add(copy2);

popup.add(paste2);

popup.addSeparator();

popup.add(selectAll2);

// 添加到文本域容器

textarea.add(popup);

// 匿名内部类监听器右键动作

textarea.addMouseListener(new MouseAdapter() {

public void mouseReleased(MouseEvent e) {

if (e.getButton() == MouseEvent.BUTTON3) {

popup.show(textarea, e.getX(), e.getY());

}

}

});

// 边界布局

this.add(menubar, BorderLayout.NORTH);

this.add(scroll, BorderLayout.CENTER);

this.setTitle("记事本");

this.setSize(500, 400);

this.setLocationRelativeTo(null);

this.setIconImage(new ImageIcon(this.getClass().getResource("/icon/notepad.png")).getImage());//图标放在源目录的icon文件夹

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

this.setVisible(true);

}

// 重写actionPerformed

@Override

public void actionPerformed(ActionEvent e) {

// Event对象发生源

if (e.getSource() == open) {

JFileChooser chooser = new JFileChooser();

FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");

chooser.setFileFilter(filter);

chooser.sBrPgvWetDialogTitle("文件打开");

chooser.showOpenDialog(null);

chooser.setVisible(true);

try {

pathSelect = chooser.getSelectedFile().getPath();

FileReader wjl = new FileReader(pathSelect);

BufferedReader hcl = new BufferedReader(wjl);

String s = "", zfc = "";

while ((s = hcl.readLine()) != null) {

zfc += (s + "\n");

}

textarea.setText(zfc);

} catch (Exception e1) {

}

}

if (e.getSource() == saveAs) {// 另存为

JFileChooser chooser = new JFileChooser();

FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");

chooser.setFileFilter(filter);

chooser.setDialogTitle("另存为");

chooser.showSaveDialog(null);

chooser.setVisible(true);

PrintStream ps;

try {

String select = chooser.getSelectedFile().getPath();

ps = new PrintStream(select);

System.setOut(ps);

System.out.println(this.textarea.getText());

} catch (Exception e1) {

}

}

if (e.getSource() == save && (pathSelect == null)) {// 保存

JFileChooser chooser = new JFileChooser();

chooser.setDialogTitle("保存");

chooser.showSaveDialog(null);

chooser.setVisible(true);

PrintStream ps;

try {

pathSelect = chooser.getSelectedFile().getPath();

ps = new PrintStream(pathSelect);

System.setOut(ps);

System.out.println(this.textarea.getText());

} catch (Exception e1) {

}

} else if (e.getSource() == save && !(pathSelect == null)) {

PrintStream ps;

try {

ps = new PrintStream(pathSelect);

System.setOut(ps);

System.out.println(this.textarea.getText());

} catch (FileNotFoundException e1) {

}

}

if (e.getSource() == create) {

textarea.setText("");

pathSelect = null;

}

if (e.getSource() == exit) {

System.exit(0);

}

if (e.getSource() == undo) {

if (um.canUndo()) {

um.undo();

}

}

if (e.getSource() == cut || e.getSource() == cut2) {

textarea.cut();

} else if (e.getSource() == copy || e.getSource() == copy2) {

textarea.copy();

} else if (e.getSource() == paste || e.getSource() == paste2) {

textarea.paste();

} else if (e.getSource() == findRep) {

new FindAndReplace(textarea);

}

else if (e.getSource() == selectAll || e.getSource() == selectAll2) {

textarea.selectAll();

}

if (e.getSource() == font) {

new Format(textarea);

}

if (e.getSource() == about) {

new About();

}

}

public static void main(String[] args) {

new JNotepad();

}

}

class FindAndReplace extends JDialog implements ActionListener {// 查找和替换

JLabel findLabel = new JLabel("查找内容：");

JLabel repLabel = new JLabel(" 替换为：");

JTextField findTf = new JTextField(8);

JTextField repTf = new JTextField(8);

JButton findBtn = new JButton("查找");

JButton repBtn = new JButton("替换");

JPanel findPn = new JPanel();

JPanel repPn = new JPanel();

JTextArea textarea;

String text;

boolean flg = false;

int len;

int start = 0;

int k = 0;

public FindAndReplace(JTextArea textarea) {

this.textarea = textarea;

findPn.add(findLaBrPgvWbel);

findPn.add(findTf);

findPn.add(findBtn);

repPn.add(repLabel);

repPn.add(repTf);

repPn.add(repBtn);

this.add(findPn);

this.add(repPn);

findBtn.addActionListener(this);

repBtn.addActionListener(this);

this.setTitle("查找和替换");

this.setLayout(new GridLayout(2, 1));

// this.setBounds(400, 200, 300, 140);

this.pack();

this.setLocationRelativeTo(null);

this.setResizable(false);

this.setVisible(true);

this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

}

@SuppressWarnings("deprecation")

public void actionPerformed(ActionEvent e) {

String findText = findTf.getText();

String repText = repTf.getText();

text = textarea.getText();

if (e.getSource() == findBtn) {

findBtn.setLabel("下一个");

if (findText != null) {

len = findText.length();

start = text.indexOf(findText, k);

k = start + len;

textarea.select(start, start + len);

flg = true;

if (start == -1) {

JOptionPane.showMessageDialog(null, "已到文件尾部！", "提示", JOptionPane.INFORMATION_MESSAGE);

start = 0;

k = 0;

flg = false;

}

}

} else if (e.getSource() == repBtn) {

if (flg) {

textarea.replaceRange(repText, start, start + len);

flg = false;

}

}

}

}

// 字体格式

class Format extends JDialog implements ActionListener {

public static int style = 0; // 全局变量类型，默认值为0

public static int size = 16; // 全局变量字体大小，默认值为16

public static Font font = new Font("新宋体", style, size); // 全局变量字体，默认值为新宋体

JPanel pn = new JPanel();

JPanel okCelPn = new JPanel();

JPanel fontPn = new JPanel();

JPanel ptPn = new JPanel();

JLabel fontLabel = new JLabel("字体: ");

JLabel fontStyleLabel = new JLabel(" 字形: ");

JLabel ptLabel = new JLabel(" 磅值: ");

JButton ok = new JButton("确定");

JButton cancel = new JButton("取消");

GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();// 获取系统中可用的字体的名字

String[] fontName = e.getAvailableFontFamilyNames();// 获取系统中可用的字体的名字

String[] fontType = { "常规", "倾斜", "粗体", "粗偏斜体" };

JList fontList = new JList(fontName);

JList fontTypeList = new JList(fontType);

JScrollPane fontScroll = new JScrollPane(fontList);

JScrollPane fontTypeScroll = new JScrollPane(fontTypeList);

JTextArea textarea;

SpinnerModel spinnerModel = new SpinnerNumberModel(size, // initial value

0, // min

100, // max

2 // Step

);

JSpinner spinner = new JSpinner(spinnerModel);

public Format(JTextArea textarea) {

this.textarea = textarea;

ok.addActionListener(this);

cancel.addActionListener(this);

pn.setLayout(new GridLayout(2, 1));

pn.add(fontPn);

pn.add(ptPn);

fontPn.add(fontLabel);

fontPn.add(fontScroll);

fontPn.add(fontStyleLabel);

fontPn.add(fontTypeScroll);

ptPn.add(ptLabel);

ptPn.add(spinner);

fontList.setVisibleRowCount(5);

fontList.setFixedCellWidth(60);

fontList.setSelectedIndex(50);

fontList.setSelectedValue(font.getFontName(), true);

fontTypeList.setVisibleRowCount(5);

fontTypeList.setSelectedIndex(style);

okCelPn.add(ok);

okCelPn.add(cancel);

okCelPn.setLayout(new FlowLayout(FlowLayout.RIGHT));

this.add(pn, BorderLayout.CENTER);

this.add(okCelPn, BorderLayout.SOUTH);

this.setTitle("字体");

this.pack();

this.setLocationRelativeTo(null);

this.setResizable(false);

this.setVisible(true);

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

}

public void actionPerformed(ActionEvent e) {

if (e.getSource() == ok) {

System.out.println(fontList.getSelectedValue());

style = this.type();

size = Integer.parseInt(spinner.getValue().toString());

font = new Font((String) fontList.getSelectedValue(), style, size);

textarea.setFont(font);

this.dispose();

System.out.println(type());

} else if (e.getSource() == cancel) {

this.dispose();

}

}

private int type() {

if (fontTypeList.getSelectedValue().equals("倾斜")) {

return 1;

} else if (fontTypeList.getSelectedValue().equals("粗体")) {

return 2;

} else if (fontTypeList.getSelectedValue().equals("粗偏斜体")) {

return 3;

} else

return 0;

}

}

class About extends JDialog {// 关于窗口

About() {

JOptionPane.PLAIN_MESSAGE);

}

}

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