新知识点
1.撤销
textArea添加一个实现监听接口的类（添加了之后可以一直监视着添加的删除的情况，以便来撤销
textArea.getDocument().addUndoableEditListener(
new UndoableEditListener() {
public void undoableEditHappened(UndoableEditEvent e) {
undoManager.addEdit(e.getEdit());
updateButtons();
}
});
再弄一个管理监听的类，可以撤销和恢复
UndoManager undoManager = new UndoManager();
undoButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
undoManager.undo();
} catch (CannotRedoException cre) {
cre.printStackTrace();
}
updateButtons();
}
});
redoButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
undoManager.redo();
} catch (CannotRedoException cre) {
cre.printStackTrace();
}
updateButtons();
}
});
2删除选中的文本
int start = text.getSelectionStart();
int end =text.getSelectionEnd();
text.replaceRange("", start, end); // 删除被选取的文本。
3设置时间格式
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
String s=df.format(new Date());
4激活自动换行
text.setLineWrap(true);//激活自动换行功能
text.setWrapStyleWord(true);//激活断行不断字功能(有单词会跳
5设置字体
font.setAccelerator(KeyStroke.getKeyStroke('a'));//点开菜单单键
font.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK));//使用组合键
font.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, 0));//全局不用组合键
6打包后文件路径有错
因为打包后文件路径变了，要用URL来获得资源，由于,getClass().getResource是Object类的，可以用this调用
URL url = this.getClass().getResource("/2.png");
ImageIcon addIcon = new ImageIcon(url);
about.setIcon(addIcon);
bug：
1选中文本换颜色不能实现
全部代码
package testWin; import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
public class FontDialog extends JDialog implements ListSelectionListener,ActionListener {
FontFamilyNames fontFamilyNames;
int fontSize=12;
int fontStyle=0;
String fontName="宋体"; JList fontNameList,fontSizeList,fontStyleList; Font font;
JButton yes,cancel;
static int YES=1,NO=0;
int state=-1;
FontDialog(JFrame f) {
super(f);
setTitle("字体对话框");
//font=new Font("宋体",Font.PLAIN,12);
fontFamilyNames=new FontFamilyNames();
setModal(true);//当前对话框调用setModal(boolean b)设置为有模式 //字体列表框：
String[] name=fontFamilyNames.getFontName();
fontNameList=new JList();
fontNameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fontNameList.setListData(name);
fontNameList.setVisibleRowCount(8);
//设置列表框第一条被选中
fontNameList.setSelectedIndex(0);
//添加滚动条
JScrollPane p1=new JScrollPane(fontNameList);
fontNameList.addListSelectionListener(this); //字形列表框:
String[] style={"常规 ","粗体","斜体","粗斜体"};
fontStyleList=new JList();
fontStyleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fontStyleList.setListData(style);
fontStyleList.setVisibleRowCount(8);
fontStyleList.setSelectedIndex(0);
JScrollPane p2=new JScrollPane(fontStyleList);
fontStyleList.addListSelectionListener(this); //大小列表框:
String[] size={"8 ","10","12","14","16","18","20","22","24","26","28","30","32"};
fontSizeList=new JList();
fontSizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fontSizeList.setListData(size);
fontSizeList.setVisibleRowCount(8);
fontSizeList.setSelectedIndex(0);
JScrollPane p3=new JScrollPane(fontSizeList);
fontSizeList.addListSelectionListener(this); JPanel listPanel=new JPanel();
listPanel.add(p1);
listPanel.add(p2);
listPanel.add(p3);
add(listPanel,BorderLayout.NORTH); yes=new JButton("确定");
cancel=new JButton("取消");
yes.addActionListener(this);
cancel.addActionListener(this);
JPanel pSouth=new JPanel();
pSouth.add(yes);
pSouth.add(cancel);
add(pSouth,BorderLayout.SOUTH); setBounds(250,150,400,250);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
validate();
}
public void valueChanged(ListSelectionEvent e){
if(e.getSource()==fontNameList) {
fontName=(String)fontNameList.getSelectedValue();
}
else if(e.getSource()==fontStyleList) {
fontStyle=fontStyleList.getSelectedIndex();
}
else if(e.getSource()==fontSizeList) {
String s=(String)fontSizeList.getSelectedValue();
fontSize=Integer.parseInt(s.trim());
}
font=new Font(fontName,fontStyle,fontSize);
validate();
}
public void actionPerformed(ActionEvent e) {
if(e.getSource()==yes) {
state=YES;
setVisible(false); //对话框设置为不可见
}
else if(e.getSource()==cancel) {
state=NO;
setVisible(false);
}
}
public int getState() {
return state;
}
public Font getFont() {
return font;
}
}
package testWin; import java.awt.GraphicsEnvironment;
public class FontFamilyNames {
String allFontNames[];
public String [] getFontName() {
GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
allFontNames=ge.getAvailableFontFamilyNames();
return allFontNames;
}
}
package testWin; import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date; import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.undo.UndoManager; public class Polish implements ActionListener{
JFileChooser file1=new JFileChooser();
FileNameExtensionFilter filter=new FileNameExtensionFilter("txt文件","txt");//文件名过滤
private JTextArea text;
private int huanhang=0;//换行参数
UndoManager undoManager;
private JFrame frame;
void setFrame(JFrame a){
frame=a;
}
void setText(JTextArea a){
text=a;
}
void setUnodManager(UndoManager a){
undoManager=a;
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO 自动生成的方法存根
if(e.getActionCommand().equals("撤销")){
undoManager.undo();
}else if(e.getActionCommand().equals("剪贴")){
text.cut();
}else if(e.getActionCommand().equals("复制")){
text.copy();
}else if(e.getActionCommand().equals("粘贴")){
text.paste();
}else if(e.getActionCommand().equals("删除")){
int start = text.getSelectionStart();
int end =text.getSelectionEnd();
text.replaceRange("", start, end); // 删除被选取的文本。
// String s=text.getText(); 方法2
// String a=text.getSelectedText();
// text.setText(s.replace(a,""));
}else if(e.getActionCommand().equals("全选")){
text.selectAll();
}else if(e.getActionCommand().equals("时间/日期")){
Calendar calendar=Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
String s=df.format(new Date());
text.append(s);
}else if(e.getActionCommand().equals("自动换行")){
if(huanhang%2==0){
text.setLineWrap(true);//激活自动换行功能
text.setWrapStyleWord(true);//激活断行不断字功能(有单词会跳
}else{
text.setLineWrap(false);
text.setWrapStyleWord(false);
}
huanhang++;
}else if(e.getActionCommand().equals("颜色")){
Color color2=new Color(120,30,0);
Color color1=JColorChooser.showDialog(frame,"color",color2);
text.setForeground(color1);
text.setSelectedTextColor(color1);
// JColorChooser jc=new JColorChooser();
// Color color3=jc.showDialog(null,"zb",color2);
// text.setSelectedTextColor(color3);
}else if(e.getActionCommand().equals("字体")){
FontDialog dialog1=new FontDialog(frame);
dialog1.setVisible(true);
Font font1=dialog1.getFont();
text.setFont(font1);
}else if(e.getActionCommand().equals("关于笔记本")){
JOptionPane.showMessageDialog(frame, "2015118043,黄煜成,2016/11/17完成");
}else if(e.getActionCommand().equals("打开")){
file1.setFileFilter(filter);//过滤下
int state=file1.showOpenDialog(frame);
if(state==JFileChooser.APPROVE_OPTION){
try{
File dir=file1.getSelectedFile();
FileReader fileReader=new FileReader(dir);
BufferedReader in1=new BufferedReader(fileReader);
text.setText(null);
String s=null;
for(;(s=in1.readLine())!=null;){
text.append(s+"\n");
}
in1.close();
fileReader.close();
}
catch(Exception e1){
System.out.println(e1.getMessage());
}
}
}else if(e.getActionCommand().equals("另存为")){
file1.setFileFilter(filter);//过滤下
int state=file1.showSaveDialog(frame);//显示出保存框
if(state==JFileChooser.APPROVE_OPTION){
try{
File dir=file1.getCurrentDirectory();//得到保存路径
String name=file1.getSelectedFile().getName();//得到选择的的名字
File file=new File(dir,name);
FileWriter fileWriter=new FileWriter(file);
BufferedWriter out1=new BufferedWriter(fileWriter);
out1.write(text.getText());
out1.close();
fileWriter.close();
}
catch(IOException e3){
System.out.println(e3.getMessage());
}
}
}
else if(e.getActionCommand().equals("新建")){
int n = 0;
if(text.getText()!="")
n=JOptionPane.showConfirmDialog(frame, "是否保存");
if(n==JOptionPane.YES_OPTION){ file1.setFileFilter(filter);//过滤下
int state=file1.showSaveDialog(frame);//显示出保存框
if(state==JFileChooser.APPROVE_OPTION){
try{
File dir=file1.getCurrentDirectory();//得到保存路径
String name=file1.getSelectedFile().getName();//得到选择的的名字
File file=new File(dir,name);
FileWriter fileWriter=new FileWriter(file);
BufferedWriter out1=new BufferedWriter(fileWriter);
out1.write(text.getText());
out1.close();
fileWriter.close();
}
catch(IOException e3){
System.out.println(e3.getMessage());
}
}
}
else if(n==JOptionPane.NO_OPTION){
text.setText(null);
}
}else if(e.getActionCommand().equals("退出")){
System.exit(0);
}else if(e.getActionCommand().equals("保存")){
System.out.println("1111");
File file1=new File ("新建保存文件.txt");
if(!file1.exists())
try {
file1.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
try{
FileWriter fileWriter=new FileWriter(file1);
BufferedWriter out1=new BufferedWriter(fileWriter);
out1.write(text.getText());
out1.close();
fileWriter.close();
}
catch(Exception e5){
System.out.println(e5.getMessage());
}
}
}
}
package testWin; import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Image;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.IOException;
import java.net.URL; import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.border.EmptyBorder;
import javax.swing.undo.UndoManager; public class Text extends JFrame { private JPanel contentPane;
JTextArea textArea = new JTextArea();
UndoManager undoManager = new UndoManager();
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Text frame = new Text();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
} /**
* Create the frame.
*/
public Text() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 681, 570); JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar); JMenu file = new JMenu("\u6587\u4EF6");
menuBar.add(file); JMenuItem newFile = new JMenuItem("\u65B0\u5EFA");
newFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
file.add(newFile); JMenuItem openFile = new JMenuItem("\u6253\u5F00");
openFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK));
file.add(openFile); JMenuItem saveFile = new JMenuItem("\u4FDD\u5B58");
saveFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK));
file.add(saveFile); JMenuItem save2File = new JMenuItem("\u53E6\u5B58\u4E3A");
save2File.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_M, InputEvent.CTRL_MASK));
file.add(save2File); JMenuItem print = new JMenuItem("\u6253\u5370");
print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));
file.add(print); JMenuItem close = new JMenuItem("\u9000\u51FA");
close.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
file.add(close); JMenu menu = new JMenu("\u7F16\u8F91");
menuBar.add(menu); JMenuItem revoke = new JMenuItem("\u64A4\u9500");
revoke.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK));
menu.add(revoke); JMenuItem clip = new JMenuItem("\u526A\u8D34");
clip.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_T, InputEvent.CTRL_MASK));
menu.add(clip); JMenuItem copy = new JMenuItem("\u590D\u5236");
copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK));
menu.add(copy); JMenuItem paste = new JMenuItem("\u7C98\u8D34");
paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK));
menu.add(paste); JMenuItem delete = new JMenuItem("\u5220\u9664");
delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_D, InputEvent.CTRL_MASK));
menu.add(delete); JMenuItem selectAll = new JMenuItem("\u5168\u9009");
selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK));
menu.add(selectAll); JMenuItem date = new JMenuItem("\u65F6\u95F4/\u65E5\u671F");
menu.add(date); JMenu format = new JMenu("\u683C\u5F0F");
menuBar.add(format); JMenuItem autoNextLine = new JMenuItem("\u81EA\u52A8\u6362\u884C");
autoNextLine.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK));
format.add(autoNextLine); JMenuItem font = new JMenuItem("\u5B57\u4F53");
font.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B, InputEvent.CTRL_MASK));
format.add(font); JMenuItem color = new JMenuItem("\u989C\u8272");
format.add(color); JMenu help = new JMenu("\u5E2E\u52A9");
menuBar.add(help); JMenuItem about = new JMenuItem("\u5173\u4E8E\u7B14\u8BB0\u672C");
about.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, InputEvent.CTRL_MASK)); URL url = this.getClass().getResource("/2.png");
ImageIcon addIcon = new ImageIcon(url);
about.setIcon(addIcon); help.add(about);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane); JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER); scrollPane.setViewportView(textArea); Polish polish1=new Polish();//锟斤拷锟斤拷锟斤拷
UndoPolish undo=new UndoPolish();//锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
textArea.getDocument().addUndoableEditListener(undo);//锟斤拷映锟斤拷锟斤拷锟斤拷锟� undo.setUnodManager(undoManager);
polish1.setText(textArea);
polish1.setUnodManager(undoManager);//锟斤拷锟捷癸拷锟斤拷锟斤拷
polish1.setFrame(this); revoke.addActionListener(polish1);//锟斤拷蛹锟斤拷锟�
clip.addActionListener(polish1);
copy.addActionListener(polish1);
paste.addActionListener(polish1);
delete.addActionListener(polish1);
selectAll.addActionListener(polish1);
date.addActionListener(polish1); autoNextLine.addActionListener(polish1);
color.addActionListener(polish1);
font.addActionListener(polish1); about.addActionListener(polish1); openFile.addActionListener(polish1);
save2File.addActionListener(polish1);
newFile.addActionListener(polish1);
close.addActionListener(polish1);
saveFile.addActionListener(polish1);
}
public ImageIcon getMyImage(String imageName){
ClassLoader loader = getClass().getClassLoader();
java.io.InputStream is = loader.getResourceAsStream(imageName);
Image img;
ImageIcon ii = null;
try {
img = ImageIO.read(is);
ii = new ImageIcon(img);
return ii;
} catch (IOException e) {
e.printStackTrace();
}
return ii;
} }
package testWin; import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.CannotRedoException;
import javax.swing.undo.UndoManager; public class UndoPolish implements UndoableEditListener{
UndoManager undoManager;
void setUnodManager(UndoManager a){
undoManager=a;
} @Override
public void undoableEditHappened(UndoableEditEvent e) {
// TODO 自动生成的方法存根
undoManager.addEdit(e.getEdit());
} }
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