java文本编辑器5

 package peng_jun;

 import java.awt.*;
 import java.awt.event.*;

 import javax.swing.*;

 import java.io.*;

 import javax.swing.filechooser.*;

 import java.awt.datatransfer.*;

 public class Text4 extends JFrame {
     public static void main(String[] args) throws Exception {
         new Text4();
     }

     JTextArea area = new JTextArea();;// 文本域
     String name = null;// 文件名
     String board = null;
     Clipboard cb;// 系统粘贴板 此类实现一种使用剪切/复制/粘贴操作传输数据的机制

     JMenu font = new JMenu("字体");
     JMenuItem bold = new JMenuItem("加粗");
     JMenuItem italics = new JMenuItem("斜体");
     JMenu size = new JMenu("字号");
     JMenuItem size_18 = new JMenuItem("");
     JMenuItem size_19 = new JMenuItem("");
     JMenuItem size_20 = new JMenuItem("");
     JMenuItem size_21 = new JMenuItem("");
     JMenu color = new JMenu("颜色");
     JMenuItem red = new JMenuItem("红色");
     JMenuItem blue = new JMenuItem("蓝色");

     JMenu file = new JMenu("文件");// 定义“文件”菜单项
     JMenuItem rebuild = new JMenuItem("新建");
     JMenuItem save = new JMenuItem("保存");
     JMenuItem open = new JMenuItem("打开");
     JMenuItem anotherSave = new JMenuItem("另存为");
     JMenuItem clear = new JMenuItem("清除");
     JMenuItem close = new JMenuItem("退出");

     JMenu edit = new JMenu("编辑");// 定义“编辑”菜单项
     JMenuItem cut = new JMenuItem("剪切");
     JMenuItem copy = new JMenuItem("复制");
     JMenuItem plaster = new JMenuItem("粘贴");
     JMenuItem all = new JMenuItem("全选");
     JMenuItem replice = new JMenuItem("替换");
     JMenuItem check = new JMenuItem("查找");

     JMenu help = new JMenu("帮助");// 定义“帮助”菜单项
     JMenuItem about = new JMenuItem("关于");

     Toolkit kit = Toolkit.getDefaultToolkit();// Toolkit获得本机系统的屏幕的参数
     JMenuBar jmb = new JMenuBar();// 创建菜单条

     Text4() throws Exception {// 构造函数
         setTitle("记事本");

         // 设置快捷键
         bold.setAccelerator(KeyStroke.getKeyStroke("ctrl B"));
         italics.setAccelerator(KeyStroke.getKeyStroke("ctrl I"));
         rebuild.setAccelerator(KeyStroke.getKeyStroke("ctrl N"));
         save.setAccelerator(KeyStroke.getKeyStroke("ctrl S"));
         copy.setAccelerator(KeyStroke.getKeyStroke("ctrl C"));
         open.setAccelerator(KeyStroke.getKeyStroke("ctrl O"));
         cut.setAccelerator(KeyStroke.getKeyStroke("ctrl X"));
         plaster.setAccelerator(KeyStroke.getKeyStroke("ctrl V"));
         all.setAccelerator(KeyStroke.getKeyStroke("ctrl A"));
         replice.setAccelerator(KeyStroke.getKeyStroke("ctrl H"));
         check.setAccelerator(KeyStroke.getKeyStroke("ctrl F"));

         add(jmb);
         setJMenuBar(jmb);// 设置菜单条
         add(area);
         file.add(rebuild);
         file.add(save);
         file.add(open);
         file.add(anotherSave);
         file.addSeparator();
         file.add(clear);
         file.add(close);
         // JScrollPane scroldPane=new JScrollPane(area); //设置滚动轴
         // add(scroldPane);

         edit.add(cut);
         edit.add(copy);
         edit.add(plaster);
         edit.add(all);
         edit.addSeparator();
         edit.add(replice);
         edit.add(check);

         font.add(bold);
         font.add(italics);
         size.add(size_18);
         size.add(size_19);
         size.add(size_20);
         size.add(size_21);
         color.add(red);
         color.add(blue);
         font.add(size);
         font.add(color);

         help.add(about);
         // 添加事件
         clear.addActionListener(new HandleAct());
         close.addActionListener(new HandleAct());
         bold.addActionListener(new HandleAct());
         italics.addActionListener(new HandleAct());
         size_18.addActionListener(new HandleAct());
         size_19.addActionListener(new HandleAct());
         size_20.addActionListener(new HandleAct());
         size_21.addActionListener(new HandleAct());
         red.addActionListener(new HandleAct());
         blue.addActionListener(new HandleAct());
         replice.addActionListener(new HandleAct());
         check.addActionListener(new HandleAct());

         jmb.add(file);
         jmb.add(edit);
         jmb.add(font);
         jmb.add(help);
         setSize(, );// 大小信息
         // setLocation(300, 200);// 文本框位置
         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         cb = Toolkit.getDefaultToolkit().getSystemClipboard();// 调用系统剪贴板
         save.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 try {
                     saveText();
                 } catch (Exception ex) {
                 }
             }
         });
         open.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 try {
                     openText();
                 } catch (Exception ex) {
                 }
             }
         });
         rebuild.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 try {
                     area.setText("");
                     name = null;
                 } catch (Exception ex) {
                 }
             }
         });
         anotherSave.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 anotherSaveText();
             }
         });

         size_18.addActionListener(new ActionListener() {

             @Override
             public void actionPerformed(ActionEvent e) {
                 // TODO 自动生成的方法存根
                 Font oldF = area.getFont();// 获取当前字体
                 String name = oldF.getName();// 获取当前字体的名字
                 area.setFont(new Font(name, oldF.getStyle(), ));
             }
         });

         cut.addActionListener(new ActionListener() // 剪切
         {
             public void actionPerformed(ActionEvent e) {
                 board = area.getSelectedText();
                 cb.setContents(new StringSelection(board), null);
                 area.replaceRange("", area.getSelectionStart(),
                         area.getSelectionEnd());
             }
         });
         copy.addActionListener(new ActionListener() // 复制
         {
             public void actionPerformed(ActionEvent e) {
                 board = area.getSelectedText();
                 cb.setContents(new StringSelection(board), null);
             }
         });
         plaster.addActionListener(new ActionListener() // 粘贴
         {
             public void actionPerformed(ActionEvent e) {
                 try {
                     Transferable content = cb.getContents(null);
                     String st = (String) content
                             .getTransferData(DataFlavor.stringFlavor);
                     area.replaceRange(st, area.getSelectionStart(),
                             area.getSelectionEnd());
                 } catch (Exception ex) {
                 }
             }
         });
         all.addActionListener(new ActionListener() // 全选
         {
             public void actionPerformed(ActionEvent e) {
                 area.setSelectionStart();
                 area.setSelectionEnd(area.getText().length());
             }
         });

         about.addActionListener(new ActionListener() {// 帮助
             public void actionPerformed(ActionEvent e) {
                 JFrame frame = new JFrame("关于");
                 frame.setSize(, );
                 frame.setLocation(, );
                 JTextArea area1 = new JTextArea("java简易文本编辑器开发人员：" + '\n'
                         + "彭军军 201321091103，" + '\n' + "鲍静瑶201321091080，"
                         + '\n' + "刘瑾 201321091081.");
                 frame.add(area1);
                 frame.setVisible(true);
             }
         });
     }

     public void openText() // 打开
     {
         /*
          * 在选择文件方法中，首先创建JFileChooser文件选择器，
          * 使用JFileChooser类的setFileFilter（）方法创建文件扩展名过滤器，再使用JFileChooser类
          * 的setFileSelectionMode（）方法设置文件选择模式为文件，
          * 通过JFileChooser类的showOpenDialog（）方法显示文件打开对话框，确定用户按下打开按钮，
          * 而非取消按钮后，通过JFileChooser类的getSelectedFile()方法获取用户选择的文件对象，
          * 使用JTextField类的setText()方法显示文件信息到文本框。
          */
         JFileChooser chooser = new JFileChooser();//创建JFileChooser文件选择器
         FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
                 "txt", "java","html","css","js");//文件过滤器
         chooser.setFileFilter(filter);
         chooser.setCurrentDirectory(new File("."));
         int result = chooser.showOpenDialog(Text4.this);//打开当前文件夹
         if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
             name = chooser.getSelectedFile().getPath();//获取文件对象
             setTitle(name);
             try {
                 BufferedReader in = new BufferedReader(new FileReader(name));
                 String line = null;
                 String datas = "";//保存数据
                 //用while循环来判断读取是否结束  此处用的是行读取
                 while ((line = in.readLine()) != null) {
                     if (datas == "") {
                         datas = datas + line;
                     } else {
                         datas = datas + "\n" + line;
                     }
                 }
                 area.setText(datas);
                 in.close();
             } catch (Exception ex) {
             }
         }
     }

     public void saveText() // 保存
     {
         if (name == null) {
             JFileChooser chooser = new JFileChooser();
             FileNameExtensionFilter filter = new FileNameExtensionFilter(
                     "Files", "txt", "java");// 限制扩展名，只能杜渠道txt和java类型的文件
             chooser.setFileFilter(filter);
             chooser.setCurrentDirectory(new File("."));//设置当前目录
             int result = chooser.showSaveDialog(Text4.this);
             if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
                 name = chooser.getSelectedFile().getPath();
                 try {
                     OutputStream out = new FileOutputStream(name);
                     String datas = area.getText();
                     out.write(datas.getBytes());
                     out.close();
                 } catch (Exception ex) {
                 }
             }
         }
     }

     public void anotherSaveText() // 另存为
     {
         JFileChooser chooser = new JFileChooser();
         FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
                 "txt", "java","html","js","css");
         chooser.setFileFilter(filter);
         chooser.setCurrentDirectory(new File("."));
         int result = chooser.showSaveDialog(Text4.this);
         if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
             name = chooser.getSelectedFile().getPath();
             try {
                 OutputStream out = new FileOutputStream(name);
                 String datas = area.getText();
                 out.write(datas.getBytes());
                 out.close();
             } catch (Exception ex) {
             }
         }
     }

     class HandleAct implements ActionListener {// 内部类

         public void actionPerformed(ActionEvent e) {
             // TODO 自动生成的方法存根
             Font oldF = area.getFont();// 获取当前字体
             String name = oldF.getName();// 获取当前字体的名字
             int size = oldF.getSize();// 当前字体的大小
             if (e.getSource() == size_18)
                 area.setFont(new Font(name, oldF.getStyle(), ));
             else if (e.getSource() == size_19)
                 area.setFont(new Font(name, oldF.getStyle(), ));
             else if (e.getSource() == size_20)
                 area.setFont(new Font(name, oldF.getStyle(), ));
             else if (e.getSource() == size_21)
                 area.setFont(new Font(name, oldF.getStyle(), ));

             if (e.getSource() == red) {
                 area.setForeground(Color.red);// 设置文字颜色
             } else if (e.getSource() == blue) {
                 area.setForeground(Color.blue);// 设置文字颜色
             }

             if (e.getSource() == bold) {
                 area.setFont(new Font(name, Font.BOLD, size));
             } else if (e.getSource() == italics) {
                 area.setFont(new Font(name, Font.ITALIC, size));
             }

             if (e.getSource() == clear) {
                 area.setText(" ");
             } else if (e.getSource() == close) {
                 System.exit();
             }

             if (e.getSource() == replice) {
                 //替换弹出框的布局
                 JPanel replacePanel = new JPanel();
                 JLabel lookupLabel = new JLabel("要替换的内容");
                 JTextField inputText = new JTextField();
                 JLabel replaceLabel = new JLabel("替换为");
                 JTextField changetoText = new JTextField();
                 replacePanel.add(lookupLabel);
                 replacePanel.add(inputText);
                 replacePanel.add(replaceLabel);
                 replacePanel.add(changetoText);
                 //布局结束
                 JOptionPane.showMessageDialog(null, replacePanel);
                 String text = area.getText();//获得整个文本内容
                 String changeText = text.replace(inputText.getText(),
                         changetoText.getText());//启用replace功能函数
                 area.setText(changeText);
             }
             else if (e.getSource() == check) {
                 //查找弹出框的布局
                 JPanel swapPanel=new JPanel();
                 JLabel seekLabel=new JLabel("要查找的内容");
                 JTextField inputText=new JTextField();
                 swapPanel.add(seekLabel);
                 swapPanel.add(inputText);
                 JOptionPane.showMessageDialog(null,swapPanel);
                 //布局结束
                 String text=area.getText();//获得整个文本内容
                 int fromIndex=area.getCaretPosition();//取得当前的光标位置
                 int lastfromIndex=text.lastIndexOf(inputText.getText(),fromIndex);//获得查找后的位置
                 area.setCaretPosition(lastfromIndex);
                 area.moveCaretPosition(lastfromIndex+inputText.getText().length());//使查找到的子字符串显示出来
             }

         }

     }

 }