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Copy pathNotepad.java
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Copy pathNotepad.java
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535 lines (444 loc) · 13.5 KB
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importjava.awt.Dialog;
importjava.awt.FileDialog;
importjava.awt.GridLayout;
importjava.awt.Toolkit;
importjava.awt.RenderingHints.Key;
importjava.awt.datatransfer.Clipboard;
importjava.awt.datatransfer.DataFlavor;
importjava.awt.datatransfer.StringSelection;
importjava.awt.datatransfer.Transferable;
importjava.awt.datatransfer.UnsupportedFlavorException;
importjava.awt.event.*;
importjava.io.BufferedReader;
importjava.io.BufferedWriter;
importjava.io.File;
importjava.io.FileDescriptor;
importjava.io.FileReader;
importjava.io.FileWriter;
importjava.io.FilenameFilter;
importjava.io.IOException;
importjava.io.PrintWriter;
importjava.io.Writer;
importjavax.swing.*;
importjavax.swing.event.*;
importjavax.swing.filechooser.FileNameExtensionFilter;
importjavax.swing.undo.UndoManager;
publicclassNotepadextendsJFrameimplementsActionListener {
//窗体和输入区域
JPanelpl = newJPanel();
JTextAreamyarea = newJTextArea();
privateStringfilename; // 打开的文件名
StringtextContent = "";// 编辑框中的内容
UndoManagerundoManager = newUndoManager();// 撤销管理器
publicNotepad() {
initComponment();// 面板初始化
}
privatevoidinitComponment() {
// 菜单栏
JMenuBarmb = newJMenuBar();
// 弹出菜单
finalJPopupMenumyPopMenu = newJPopupMenu();
JMenuItemcopy_pop = newJMenuItem("复制");
JMenuItemcut_pop = newJMenuItem("剪切");
JMenuItempaste_pop = newJMenuItem("粘贴");
JMenuItemdelete_pop = newJMenuItem("删除");
JMenuItemexit_pop = newJMenuItem("清空");
myPopMenu.add(cut_pop);
myPopMenu.add(copy_pop);
myPopMenu.add(delete_pop);
myPopMenu.add(paste_pop);
myPopMenu.add(exit_pop);
// 绑定监听器
cut_pop.addActionListener(this);
copy_pop.addActionListener(this);
delete_pop.addActionListener(this);
paste_pop.addActionListener(this);
exit_pop.addActionListener(this);
// 菜单
JMenufile = newJMenu("文件");
JMenuedit = newJMenu("编辑");
JMenuabout = newJMenu("关于");
// 子菜单
JMenuItemnew_file = newJMenuItem("新建");
JMenuItemopen = newJMenuItem("打开");
JMenuItemsave = newJMenuItem("保存");
JMenuItemsave_as = newJMenuItem("另存为");
JMenuItemexit = newJMenuItem("退出");
JMenuItemcopy = newJMenuItem("复制");
JMenuItemcut = newJMenuItem("剪切");
JMenuItempaste = newJMenuItem("粘贴");
JMenuItemdelete = newJMenuItem("删除");
JMenuItemsearch = newJMenuItem("查找和替换");
JMenuItemaboutsoft = newJMenuItem("关于软件");
// 绑定监听事件
aboutsoft.addActionListener(this);
new_file.addActionListener(this);
open.addActionListener(this);
save.addActionListener(this);
save_as.addActionListener(this);
exit.addActionListener(this);
copy.addActionListener(this);
cut.addActionListener(this);
paste.addActionListener(this);
delete.addActionListener(this);
search.addActionListener(this);
// 将菜单和相应的子菜单添加到菜单栏
mb.add(file);
mb.add(edit);
mb.add(about);
file.add(open);
file.add(new_file);
file.add(save);
file.add(save_as);
file.add(exit);
edit.add(copy);
edit.add(cut);
edit.add(paste);
edit.add(delete);
edit.add(search);
about.add(aboutsoft);
// 给文本区域添加滚动条
myarea.add(myPopMenu);
JScrollPanescrollpane = newJScrollPane(myarea);
add(scrollpane);
// 主窗口
setTitle("记事本");
setSize(600, 400);
setLocation(400, 300);
// 添加菜单栏
setJMenuBar(mb);
// 窗口监听
addWindowListener(newWindowAdapter() {
publicvoidwindowClosing(WindowEventevt) {
if(!myarea.getText().equals(textContent))
{
intresult = JOptionPane.showConfirmDialog(null, "文件内容已改变,确认保存退出吗?", "警告", JOptionPane.YES_NO_OPTION);
switch (result) {
caseJOptionPane.NO_OPTION:
System.exit(0);
break;
caseJOptionPane.YES_OPTION:
save();
System.exit(0);
break;
default:
break;
}
}
else {
System.exit(0);
}
}
});
//键盘监听
myarea.addKeyListener(newKeyAdapter()
{
publicvoidkeyPressed(KeyEventke)
{
//ctrl+f实现查找功能
if ((ke.getKeyCode() == KeyEvent.VK_F)
&& (ke.isControlDown()))
{
// 查找对话框
JDialogsearch = newJDialog(Notepad.this, "查找和替换");
search.setSize(200, 100);
search.setLocation(450, 350);
JLabellabel_1 = newJLabel("查找的内容");
JLabellabel_2 = newJLabel("替换的内容");
finalJTextFieldtextField_1 = newJTextField(5);
finalJTextFieldtextField_2 = newJTextField(5);
JButtonbuttonFind = newJButton("查找");
JButtonbuttonChange = newJButton("替换");
JPanelpanel = newJPanel(newGridLayout(2, 3));
panel.add(label_1);
panel.add(textField_1);
panel.add(buttonFind);
panel.add(label_2);
panel.add(textField_2);
panel.add(buttonChange);
search.add(panel);
search.setVisible(true);
// 为查找下一个 按钮绑定监听事件
buttonFind.addActionListener(newActionListener() {
@Override
publicvoidactionPerformed(ActionEvente) {
// TODO Auto-generated method stub
StringfindText = textField_1.getText();// 查找的字符串
StringtextArea = myarea.getText();// 当前文本框的内容
start = textArea.indexOf(findText, end);
end = start + findText.length();
if (start == -1)// 没有找到
{
JOptionPane.showMessageDialog(null, "“"+findText+"”"+"已经查找完毕", "记事本", JOptionPane.WARNING_MESSAGE);
myarea.select(start, end);
} else {
myarea.select(start, end);
}
}
});
// 为替换按钮绑定监听时间
buttonChange.addActionListener(newActionListener() {
@Override
publicvoidactionPerformed(ActionEvente) {
// TODO Auto-generated method stub
StringchangeText = textField_2.getText();// 替换的字符串
myarea.select(start, end);
myarea.replaceSelection(changeText);
myarea.select(start, end);
}
});
}
//esc退出
if (ke.getKeyCode()==KeyEvent.VK_ESCAPE)
{
if(!myarea.getText().equals(textContent))
{
intresult = JOptionPane.showConfirmDialog(null, "文件内容已改变,确认保存退出吗?", "警告", 1);
switch (result) {
caseJOptionPane.NO_OPTION:
System.exit(0);
break;
caseJOptionPane.YES_OPTION:
save();
System.exit(0);
break;
caseJOptionPane.CANCEL_OPTION:
break;
default:
break;
}
}
}
}
});
// 鼠标监听
myarea.addMouseListener(newMouseAdapter() {
publicvoidmousePressed(MouseEvente) {
intmods = e.getModifiers();
// 鼠标右键
if ((mods & InputEvent.BUTTON3_MASK) != 0) {
// 弹出菜单
myPopMenu.show(e.getComponent(), e.getX(), e.getY());
}
}
});
}
// 相关变量
intstart = 0;// 查找开始位置
intend = 0;// 查找结束位置
@Override
publicvoidactionPerformed(ActionEvente) {
// TODO Auto-generated method stub
try {
if (e.getActionCommand() == "新建") {
myarea.setText("");
} elseif (e.getActionCommand() == "打开") {
FileDialogfileDialog = newFileDialog(this, "打开文件", FileDialog.LOAD);
fileDialog.setFile("*.txt");
fileDialog.setVisible(true);
if (fileDialog.getFile() != null) {
filename = fileDialog.getDirectory() + fileDialog.getFile();// 获得文件名
// 读取文件
FileReaderfile_reader = newFileReader(filename);// 此处必须要捕获异常
BufferedReaderbr = newBufferedReader(file_reader);
Stringtemp = "";
while (br.ready())// 判断缓冲区是否为空,非空时返回true
{
intc = br.read();
temp = temp+ (char)c;
}
myarea.setText(temp);
br.close();
file_reader.close();
textContent = myarea.getText();
setTitle("记事本-" + filename);
}
} elseif (e.getActionCommand() == "保存") {
save();
} elseif (e.getActionCommand() == "另存为") {
otherSave();
} elseif (e.getActionCommand() == "退出") {
if(!myarea.getText().equals(textContent))
{
intresult = JOptionPane.showConfirmDialog(null, "文件内容已改变,确认保存退出吗?", "警告", 1);
switch (result) {
caseJOptionPane.NO_OPTION:
System.exit(0);
break;
caseJOptionPane.YES_OPTION:
save();
System.exit(0);
break;
caseJOptionPane.CANCEL_OPTION:
break;
default:
break;
}
}
else {
System.exit(0);
}
} elseif (e.getActionCommand() == "查找和替换") {
// 查找对话框
JDialogsearch = newJDialog(this, "查找和替换");
search.setSize(200, 100);
search.setLocation(450, 350);
JLabellabel_1 = newJLabel("查找的内容");
JLabellabel_2 = newJLabel("替换的内容");
finalJTextFieldtextField_1 = newJTextField(5);
finalJTextFieldtextField_2 = newJTextField(5);
JButtonbuttonFind = newJButton("查找");
JButtonbuttonChange = newJButton("替换");
JPanelpanel = newJPanel(newGridLayout(2, 3));
panel.add(label_1);
panel.add(textField_1);
panel.add(buttonFind);
panel.add(label_2);
panel.add(textField_2);
panel.add(buttonChange);
search.add(panel);
search.setVisible(true);
// 为查找下一个 按钮绑定监听事件
buttonFind.addActionListener(newActionListener() {
@Override
publicvoidactionPerformed(ActionEvente) {
// TODO Auto-generated method stub
StringfindText = textField_1.getText();// 查找的字符串
StringtextArea = myarea.getText();// 当前文本框的内容
start = textArea.indexOf(findText, end);
end = start + findText.length();
// 没有找到
if (start == -1)
{
JOptionPane.showMessageDialog(null, "“"+findText+"”"+"已经查找完毕", "记事本", JOptionPane.WARNING_MESSAGE);
myarea.select(start, end);
} else {
myarea.select(start, end);
}
}
});
// 为替换按钮绑定监听事件
buttonChange.addActionListener(newActionListener() {
@Override
publicvoidactionPerformed(ActionEvente) {
// TODO Auto-generated method stub
StringchangeText = textField_2.getText();// 替换的字符串
myarea.select(start, end);
myarea.replaceSelection(changeText);
myarea.select(start, end);
}
});
} elseif (e.getActionCommand() == "复制") {
copy();
} elseif (e.getActionCommand() == "粘贴") {
paste();
} elseif (e.getActionCommand() == "剪切") {
cut();
} elseif (e.getActionCommand() == "删除") {
delete();
} elseif (e.getActionCommand() == "关于软件") {
JOptionPane.showMessageDialog(null,"单金伟设计编写","软件信息",JOptionPane. INFORMATION_MESSAGE);
}elseif (e.getActionCommand() == "清空")
{
intresult = JOptionPane.showConfirmDialog(null, "确认清空所有文字吗?", "警告", 1);
if (result == JOptionPane.OK_OPTION) {
// myarea.replaceRange(null,0,textContent.length());
myarea.setText(null);
}
}
} catch (Exceptionex) {
ex.printStackTrace();
}
}
//保存
privatevoidsave() {
if (filename != null)
{
try {
Filefile = newFile(filename);
FileWriterfile_writer = newFileWriter(file);
//将文件输出流包装进缓冲区
BufferedWriterbw = newBufferedWriter(file_writer);
PrintWriterpw = newPrintWriter(bw);
pw.print(myarea.getText());
textContent = myarea.getText();
pw.close();
bw.close();
file_writer.close();
} catch (Exceptione) {
e.printStackTrace();
}
}else {
otherSave();
}
}
//另存为
privatevoidotherSave()
{
FileDialogfileDialog = newFileDialog(this, "另存为", FileDialog.SAVE);
fileDialog.setFile("*.txt");
fileDialog.setVisible(true);
if (fileDialog.getFile() != null) {
// 写入文件
FileWriterfw;
try {
fw = newFileWriter(fileDialog.getDirectory() + fileDialog.getFile());
BufferedWriterbw = newBufferedWriter(fw);
PrintWriterpw = newPrintWriter(bw);
pw.print(myarea.getText());
textContent = myarea.getText();
pw.close();
bw.close();
fw.close();
}
catch (IOExceptione) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//剪切
privatevoidcut() {
copy();
delete();
}
//复制
privatevoidcopy() {
if (myarea.getSelectedText() == null) {
JOptionPane.showMessageDialog(null, "你没有选中任何文字!", "记事本", JOptionPane.WARNING_MESSAGE);
}
ClipboardclipBoard = Toolkit.getDefaultToolkit().getSystemClipboard();
StringSelectionstringSelection = newStringSelection(myarea.getSelectedText());
clipBoard.setContents(stringSelection, null);
}
//粘贴
privatevoidpaste() throwsUnsupportedFlavorException, IOException {
Stringcontent_copy = "";
// 构造系统剪切板
ClipboardclipBoard = Toolkit.getDefaultToolkit().getSystemClipboard();
// 获取剪切板内容
Transferablecontent = clipBoard.getContents(null);
if (content != null) {
// 检查是否是文本类型
if (content.isDataFlavorSupported(DataFlavor.stringFlavor)) {
content_copy = (String) content.getTransferData(DataFlavor.stringFlavor);
// 判断文本框中有无文字选中
if (myarea.getSelectedText() != null) {
myarea.replaceSelection(content_copy);
} else {
myarea.insert(content_copy, myarea.getSelectionStart());
}
}
}
}
//删除
privatevoiddelete() {
if (myarea.getSelectedText() == null) {
JOptionPane.showMessageDialog(null, "你没有选中任何文字!", "记事本", JOptionPane.WARNING_MESSAGE);
}
myarea.replaceSelection("");
}
publicstaticvoidmain(String[] args) {
newNotepad().setVisible(true);
}
}