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

  1.         textArea.getDocument().addUndoableEditListener(
  2.                 new UndoableEditListener() {
  3.                     public void undoableEditHappened(UndoableEditEvent e) {
  4.                         undoManager.addEdit(e.getEdit());
  5.                         updateButtons();
  6.                     }
  7.                 });

再弄一个管理监听的类，可以撤销和恢复

UndoManager undoManager = new UndoManager();

  1.         undoButton.addActionListener(new ActionListener() {
  2.             public void actionPerformed(ActionEvent e) {
  3.                 try {
  4.                     undoManager.undo();
  5.                 } catch (CannotRedoException cre) {
  6.                     cre.printStackTrace();
  7.                 }
  8.                 updateButtons();
  9.             }
  10.         });
  11.  
  12.         redoButton.addActionListener(new ActionListener() {
  13.             public void actionPerformed(ActionEvent e) {
  14.                 try {
  15.                     undoManager.redo();
  16.                 } catch (CannotRedoException cre) {
  17.                     cre.printStackTrace();
  18.                 }
  19.                 updateButtons();
  20.             }
  21.         });

2删除选中的文本

  1.             int start = text.getSelectionStart();
  2.             int end =text.getSelectionEnd();
  3.             text.replaceRange("", start, end); // 删除被选取的文本。

3设置时间格式

  1.             SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
  2.             String s=df.format(new Date());

4激活自动换行

  1.                 text.setLineWrap(true);//激活自动换行功能
  2.                 text.setWrapStyleWord(true);//激活断行不断字功能(有单词会跳

5设置字体

  1. font.setAccelerator(KeyStroke.getKeyStroke('a'));//点开菜单单键
  2. font.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK));//使用组合键
  3. 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

  1.         URL url = this.getClass().getResource("/2.png");
  2.         ImageIcon addIcon = new ImageIcon(url);
  3.         about.setIcon(addIcon);

bug：

1选中文本换颜色不能实现

全部代码

  1. package testWin;
  2.  
  3. import java.awt.event.*;
  4. import java.awt.*;
  5. import javax.swing.*;
  6. import javax.swing.event.*;
  7. public class FontDialog extends JDialog implements ListSelectionListener,ActionListener {
  8.    FontFamilyNames fontFamilyNames;
  9.    int fontSize=12;
  10.    int fontStyle=0;
  11.    String fontName="宋体";
  12.  
  13.    JList fontNameList,fontSizeList,fontStyleList;
  14.  
  15.    Font font;
  16.    JButton yes,cancel;
  17.    static int YES=1,NO=0;
  18.    int state=-1;
  19.    FontDialog(JFrame f) {
  20.       super(f);
  21.       setTitle("字体对话框");
  22.       //font=new Font("宋体",Font.PLAIN,12);
  23.       fontFamilyNames=new FontFamilyNames();
  24.       setModal(true);//当前对话框调用setModal(boolean b)设置为有模式
  25.  
  26.       //字体列表框：
  27.       String[] name=fontFamilyNames.getFontName();
  28.       fontNameList=new JList();
  29.       fontNameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  30.       fontNameList.setListData(name);
  31.       fontNameList.setVisibleRowCount(8);
  32.       //设置列表框第一条被选中
  33.       fontNameList.setSelectedIndex(0);
  34.       //添加滚动条
  35.       JScrollPane p1=new JScrollPane(fontNameList);
  36.       fontNameList.addListSelectionListener(this);
  37.  
  38.       //字形列表框:
  39.       String[] style={"常规                    ","粗体","斜体","粗斜体"};
  40.       fontStyleList=new JList();
  41.       fontStyleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  42.       fontStyleList.setListData(style);
  43.       fontStyleList.setVisibleRowCount(8);
  44.       fontStyleList.setSelectedIndex(0);
  45.       JScrollPane p2=new JScrollPane(fontStyleList);
  46.       fontStyleList.addListSelectionListener(this);        
  47.  
  48.       //大小列表框:
  49.       String[] size={"8        ","10","12","14","16","18","20","22","24","26","28","30","32"};
  50.       fontSizeList=new JList();
  51.       fontSizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  52.       fontSizeList.setListData(size);
  53.       fontSizeList.setVisibleRowCount(8);
  54.       fontSizeList.setSelectedIndex(0);
  55.       JScrollPane p3=new JScrollPane(fontSizeList);
  56.       fontSizeList.addListSelectionListener(this); 
  57.  
  58.       JPanel listPanel=new JPanel();
  59.       listPanel.add(p1);
  60.       listPanel.add(p2);
  61.       listPanel.add(p3);
  62.       add(listPanel,BorderLayout.NORTH);      
  63.  
  64.       yes=new JButton("确定");
  65.       cancel=new JButton("取消");
  66.       yes.addActionListener(this);
  67.       cancel.addActionListener(this);
  68.       JPanel pSouth=new JPanel();
  69.       pSouth.add(yes);
  70.       pSouth.add(cancel);
  71.       add(pSouth,BorderLayout.SOUTH);   
  72.  
  73.       setBounds(250,150,400,250);
  74.       setDefaultCloseOperation(DISPOSE_ON_CLOSE);
  75.       validate();
  76.    }
  77.    public void valueChanged(ListSelectionEvent e){
  78.       if(e.getSource()==fontNameList) {
  79.          fontName=(String)fontNameList.getSelectedValue();
  80.       }
  81.       else if(e.getSource()==fontStyleList) {
  82.           fontStyle=fontStyleList.getSelectedIndex();
  83.       }
  84.       else if(e.getSource()==fontSizeList) {
  85.          String s=(String)fontSizeList.getSelectedValue();
  86.          fontSize=Integer.parseInt(s.trim());
  87.      }
  88.       font=new Font(fontName,fontStyle,fontSize);
  89.       validate();
  90.    }
  91.    public void actionPerformed(ActionEvent e) {
  92.       if(e.getSource()==yes) {
  93.           state=YES;
  94.           setVisible(false);       //对话框设置为不可见
  95.       }
  96.       else if(e.getSource()==cancel) {
  97.          state=NO;
  98.          setVisible(false);
  99.       }
  100.    }
  101.    public int getState() {
  102.       return state;
  103.    }
  104.    public Font getFont() {
  105.       return font;
  106.    }
  107. } 
  1. package testWin;
  2.  
  3. import java.awt.GraphicsEnvironment;
  4. public class FontFamilyNames {
  5.     String allFontNames[];
  6.     public String [] getFontName() {
  7.       GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  8.       allFontNames=ge.getAvailableFontFamilyNames();
  9.       return allFontNames;
  10.     }
  11. }
  1. package testWin;
  2.  
  3. import java.awt.Color;
  4. import java.awt.Font;
  5. import java.awt.event.ActionEvent;
  6. import java.awt.event.ActionListener;
  7. import java.io.*;
  8. import java.text.SimpleDateFormat;
  9. import java.util.Calendar;
  10. import java.util.Date;
  11.  
  12. import javax.swing.*;
  13. import javax.swing.filechooser.FileNameExtensionFilter;
  14. import javax.swing.undo.UndoManager;
  15.  
  16. public class Polish implements ActionListener{
  17.     JFileChooser file1=new JFileChooser();
  18.     FileNameExtensionFilter filter=new FileNameExtensionFilter("txt文件","txt");//文件名过滤
  19.     private JTextArea text;
  20.     private int huanhang=0;//换行参数
  21.     UndoManager undoManager;
  22.     private JFrame frame;
  23.     void setFrame(JFrame a){
  24.         frame=a;
  25.     }
  26.     void setText(JTextArea a){
  27.         text=a;
  28.     }
  29.     void setUnodManager(UndoManager a){
  30.         undoManager=a;
  31.     }
  32.     @Override
  33.     public void actionPerformed(ActionEvent e) {
  34.         // TODO 自动生成的方法存根
  35.         if(e.getActionCommand().equals("撤销")){
  36.             undoManager.undo();
  37.         }else if(e.getActionCommand().equals("剪贴")){
  38.             text.cut();
  39.         }else if(e.getActionCommand().equals("复制")){
  40.             text.copy();
  41.         }else if(e.getActionCommand().equals("粘贴")){
  42.             text.paste();
  43.         }else if(e.getActionCommand().equals("删除")){
  44.             int start = text.getSelectionStart();
  45.             int end =text.getSelectionEnd();
  46.             text.replaceRange("", start, end); // 删除被选取的文本。
  47. //            String s=text.getText();   方法2
  48. //            String a=text.getSelectedText();
  49. //            text.setText(s.replace(a,""));
  50.         }else if(e.getActionCommand().equals("全选")){
  51.             text.selectAll();
  52.         }else if(e.getActionCommand().equals("时间/日期")){
  53.             Calendar calendar=Calendar.getInstance();
  54.             SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
  55.             String s=df.format(new Date());
  56.             text.append(s);
  57.         }else if(e.getActionCommand().equals("自动换行")){
  58.             if(huanhang%2==0){
  59.                 text.setLineWrap(true);//激活自动换行功能
  60.                 text.setWrapStyleWord(true);//激活断行不断字功能(有单词会跳
  61.             }else{
  62.                 text.setLineWrap(false);
  63.                 text.setWrapStyleWord(false);
  64.             }
  65.             huanhang++;
  66.         }else if(e.getActionCommand().equals("颜色")){
  67.             Color color2=new Color(120,30,0);
  68.             Color color1=JColorChooser.showDialog(frame,"color",color2);
  69.             text.setForeground(color1);
  70.             text.setSelectedTextColor(color1);
  71. //            JColorChooser   jc=new   JColorChooser();
  72. //            Color color3=jc.showDialog(null,"zb",color2);
  73. //            text.setSelectedTextColor(color3);
  74.         }else if(e.getActionCommand().equals("字体")){
  75.             FontDialog dialog1=new FontDialog(frame);
  76.             dialog1.setVisible(true);
  77.             Font font1=dialog1.getFont();
  78.             text.setFont(font1);
  79.         }else if(e.getActionCommand().equals("关于笔记本")){
  80.             JOptionPane.showMessageDialog(frame, "2015118043,黄煜成,2016/11/17完成");
  81.         }else if(e.getActionCommand().equals("打开")){
  82.             file1.setFileFilter(filter);//过滤下
  83.             int state=file1.showOpenDialog(frame);
  84.             if(state==JFileChooser.APPROVE_OPTION){
  85.                 try{
  86.                     File dir=file1.getSelectedFile();
  87.                     FileReader fileReader=new FileReader(dir);
  88.                     BufferedReader in1=new BufferedReader(fileReader);
  89.                     text.setText(null);
  90.                     String s=null;
  91.                     for(;(s=in1.readLine())!=null;){
  92.                         text.append(s+"\n");
  93.                     }
  94.                     in1.close();
  95.                     fileReader.close();
  96.                 }
  97.                 catch(Exception e1){
  98.                     System.out.println(e1.getMessage());
  99.                 }
  100.             }
  101.         }else if(e.getActionCommand().equals("另存为")){
  102.             file1.setFileFilter(filter);//过滤下
  103.             int state=file1.showSaveDialog(frame);//显示出保存框
  104.             if(state==JFileChooser.APPROVE_OPTION){
  105.                 try{
  106.                     File dir=file1.getCurrentDirectory();//得到保存路径
  107.                     String name=file1.getSelectedFile().getName();//得到选择的的名字
  108.                     File file=new File(dir,name);
  109.                     FileWriter fileWriter=new FileWriter(file);
  110.                     BufferedWriter out1=new BufferedWriter(fileWriter);
  111.                     out1.write(text.getText());
  112.                     out1.close();
  113.                     fileWriter.close();
  114.                 }
  115.                 catch(IOException e3){
  116.                     System.out.println(e3.getMessage());
  117.                 }
  118.              }
  119.         }
  120.         else if(e.getActionCommand().equals("新建")){
  121.             int n = 0;
  122.             if(text.getText()!="")
  123.                 n=JOptionPane.showConfirmDialog(frame, "是否保存");
  124.             if(n==JOptionPane.YES_OPTION){
  125.  
  126.                 file1.setFileFilter(filter);//过滤下
  127.                 int state=file1.showSaveDialog(frame);//显示出保存框
  128.                 if(state==JFileChooser.APPROVE_OPTION){
  129.                     try{
  130.                         File dir=file1.getCurrentDirectory();//得到保存路径
  131.                         String name=file1.getSelectedFile().getName();//得到选择的的名字
  132.                         File file=new File(dir,name);
  133.                         FileWriter fileWriter=new FileWriter(file);
  134.                         BufferedWriter out1=new BufferedWriter(fileWriter);
  135.                         out1.write(text.getText());
  136.                         out1.close();
  137.                         fileWriter.close();
  138.                     }
  139.                     catch(IOException e3){
  140.                         System.out.println(e3.getMessage());
  141.                     }
  142.                  }
  143.             }
  144.             else if(n==JOptionPane.NO_OPTION){
  145.                 text.setText(null);
  146.             }
  147.         }else if(e.getActionCommand().equals("退出")){
  148.             System.exit(0);
  149.         }else if(e.getActionCommand().equals("保存")){
  150.             System.out.println("1111");
  151.             File file1=new File ("新建保存文件.txt");
  152.             if(!file1.exists())
  153.                 try {
  154.                     file1.createNewFile();
  155.                 } catch (IOException e1) {
  156.                     e1.printStackTrace();
  157.                 }
  158.             try{
  159.                 FileWriter fileWriter=new FileWriter(file1);
  160.                 BufferedWriter out1=new BufferedWriter(fileWriter);
  161.                 out1.write(text.getText());
  162.                 out1.close();
  163.                 fileWriter.close();
  164.             }
  165.             catch(Exception e5){
  166.                 System.out.println(e5.getMessage());
  167.             }
  168.         }
  169.     }
  170. }
  1. package testWin;
  2.  
  3. import java.awt.BorderLayout;
  4. import java.awt.EventQueue;
  5. import java.awt.Image;
  6. import java.awt.event.InputEvent;
  7. import java.awt.event.KeyEvent;
  8. import java.io.IOException;
  9. import java.net.URL;
  10.  
  11. import javax.imageio.ImageIO;
  12. import javax.swing.ImageIcon;
  13. import javax.swing.JFrame;
  14. import javax.swing.JMenu;
  15. import javax.swing.JMenuBar;
  16. import javax.swing.JMenuItem;
  17. import javax.swing.JPanel;
  18. import javax.swing.JScrollPane;
  19. import javax.swing.JTextArea;
  20. import javax.swing.KeyStroke;
  21. import javax.swing.border.EmptyBorder;
  22. import javax.swing.undo.UndoManager;
  23.  
  24. public class Text extends JFrame {
  25.  
  26.     private JPanel contentPane;
  27.     JTextArea textArea = new JTextArea();
  28.     UndoManager undoManager = new UndoManager();
  29.     /**
  30.      * Launch the application.
  31.      */
  32.     public static void main(String[] args) {
  33.         EventQueue.invokeLater(new Runnable() {
  34.             public void run() {
  35.                 try {
  36.                     Text frame = new Text();
  37.                     frame.setVisible(true);
  38.                 } catch (Exception e) {
  39.                     e.printStackTrace();
  40.                 }
  41.             }
  42.         });
  43.     }
  44.  
  45.     /**
  46.      * Create the frame.
  47.      */
  48.     public Text() {
  49.         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  50.         setBounds(100, 100, 681, 570);
  51.  
  52.         JMenuBar menuBar = new JMenuBar();
  53.         setJMenuBar(menuBar);
  54.  
  55.         JMenu file = new JMenu("\u6587\u4EF6");
  56.         menuBar.add(file);
  57.  
  58.         JMenuItem newFile = new JMenuItem("\u65B0\u5EFA");
  59.         newFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
  60.         file.add(newFile);
  61.  
  62.         JMenuItem openFile = new JMenuItem("\u6253\u5F00");
  63.         openFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK));
  64.         file.add(openFile);
  65.  
  66.         JMenuItem saveFile = new JMenuItem("\u4FDD\u5B58");
  67.         saveFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK));
  68.         file.add(saveFile);
  69.  
  70.         JMenuItem save2File = new JMenuItem("\u53E6\u5B58\u4E3A");
  71.         save2File.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_M, InputEvent.CTRL_MASK));
  72.         file.add(save2File);
  73.  
  74.         JMenuItem print = new JMenuItem("\u6253\u5370");
  75.         print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));
  76.         file.add(print);
  77.  
  78.         JMenuItem close = new JMenuItem("\u9000\u51FA");
  79.         close.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
  80.         file.add(close);
  81.  
  82.         JMenu menu = new JMenu("\u7F16\u8F91");
  83.         menuBar.add(menu);
  84.  
  85.         JMenuItem revoke = new JMenuItem("\u64A4\u9500");
  86.         revoke.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK));
  87.         menu.add(revoke);
  88.  
  89.         JMenuItem clip = new JMenuItem("\u526A\u8D34");
  90.         clip.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_T, InputEvent.CTRL_MASK));
  91.         menu.add(clip);
  92.  
  93.         JMenuItem copy = new JMenuItem("\u590D\u5236");
  94.         copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK));
  95.         menu.add(copy);
  96.  
  97.         JMenuItem paste = new JMenuItem("\u7C98\u8D34");
  98.         paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK));
  99.         menu.add(paste);
  100.  
  101.         JMenuItem delete = new JMenuItem("\u5220\u9664");
  102.         delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_D, InputEvent.CTRL_MASK));
  103.         menu.add(delete);
  104.  
  105.         JMenuItem selectAll = new JMenuItem("\u5168\u9009");
  106.         selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK));
  107.         menu.add(selectAll);
  108.  
  109.         JMenuItem date = new JMenuItem("\u65F6\u95F4/\u65E5\u671F");
  110.         menu.add(date);
  111.  
  112.         JMenu format = new JMenu("\u683C\u5F0F");
  113.         menuBar.add(format);
  114.  
  115.         JMenuItem autoNextLine = new JMenuItem("\u81EA\u52A8\u6362\u884C");
  116.         autoNextLine.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK));
  117.         format.add(autoNextLine);
  118.  
  119.         JMenuItem font = new JMenuItem("\u5B57\u4F53");
  120.         font.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B, InputEvent.CTRL_MASK));
  121.         format.add(font);
  122.  
  123.         JMenuItem color = new JMenuItem("\u989C\u8272");
  124.         format.add(color);
  125.  
  126.         JMenu help = new JMenu("\u5E2E\u52A9");
  127.         menuBar.add(help);
  128.  
  129.         JMenuItem about = new JMenuItem("\u5173\u4E8E\u7B14\u8BB0\u672C");
  130.         about.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, InputEvent.CTRL_MASK));
  131.  
  132.         URL url = this.getClass().getResource("/2.png");
  133.         ImageIcon addIcon = new ImageIcon(url);
  134.         about.setIcon(addIcon);
  135.  
  136.         help.add(about);
  137.         contentPane = new JPanel();
  138.         contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
  139.         contentPane.setLayout(new BorderLayout(0, 0));
  140.         setContentPane(contentPane);
  141.  
  142.         JScrollPane scrollPane = new JScrollPane();
  143.         contentPane.add(scrollPane, BorderLayout.CENTER);
  144.  
  145.         scrollPane.setViewportView(textArea);
  146.  
  147.         Polish polish1=new Polish();//锟斤拷锟斤拷锟斤拷
  148.         UndoPolish undo=new UndoPolish();//锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
  149.         textArea.getDocument().addUndoableEditListener(undo);//锟斤拷映锟斤拷锟斤拷锟斤拷锟�
  150.  
  151.         undo.setUnodManager(undoManager);
  152.         polish1.setText(textArea);
  153.         polish1.setUnodManager(undoManager);//锟斤拷锟捷癸拷锟斤拷锟斤拷
  154.         polish1.setFrame(this);
  155.  
  156.         revoke.addActionListener(polish1);//锟斤拷蛹锟斤拷锟�
  157.         clip.addActionListener(polish1);
  158.         copy.addActionListener(polish1);
  159.         paste.addActionListener(polish1);
  160.         delete.addActionListener(polish1);
  161.         selectAll.addActionListener(polish1);
  162.         date.addActionListener(polish1);
  163.  
  164.         autoNextLine.addActionListener(polish1);
  165.         color.addActionListener(polish1);
  166.         font.addActionListener(polish1);
  167.  
  168.         about.addActionListener(polish1);
  169.  
  170.         openFile.addActionListener(polish1);
  171.         save2File.addActionListener(polish1);
  172.         newFile.addActionListener(polish1);
  173.         close.addActionListener(polish1);
  174.         saveFile.addActionListener(polish1);
  175.     }
  176.         public ImageIcon getMyImage(String imageName){
  177.               ClassLoader loader = getClass().getClassLoader();
  178.               java.io.InputStream is = loader.getResourceAsStream(imageName);
  179.               Image img;
  180.               ImageIcon ii = null;
  181.               try {
  182.                img = ImageIO.read(is);
  183.                ii = new ImageIcon(img);
  184.                return ii;
  185.               } catch (IOException e) {
  186.                e.printStackTrace();
  187.               }
  188.               return ii;
  189.              }
  190.  
  191. }
  1. package testWin;
  2.  
  3. import javax.swing.event.UndoableEditEvent;
  4. import javax.swing.event.UndoableEditListener;
  5. import javax.swing.undo.CannotRedoException;
  6. import javax.swing.undo.UndoManager;
  7.  
  8. public class UndoPolish implements UndoableEditListener{
  9.     UndoManager undoManager;
  10.     void setUnodManager(UndoManager a){
  11.         undoManager=a;
  12.     }
  13.  
  14.     @Override
  15.     public void undoableEditHappened(UndoableEditEvent e) {
  16.         // TODO 自动生成的方法存根
  17.         undoManager.addEdit(e.getEdit());
  18.     }
  19.  
  20. }

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