java文本编辑器 版本4

  1 package peng_jun;
  2 
  3 import java.awt.*;
  4 import java.awt.event.*;
  5 
  6 import javax.swing.*;
  7 
  8 import java.io.*;
  9 
 10 import javax.swing.filechooser.*;
 11 
 12 import java.awt.datatransfer.*;
 13 
 14 public class Text3 extends JFrame {
 15     public static void main(String[] args) throws Exception {
 16         new Text3();
 17     }
 18 
 19     TextArea area = new TextArea();;// 文本域
 20     String name = null;// 文件名
 21     String board = null;
 22     Clipboard cb;// 系统粘贴板
 23 
 24     JMenu font = new JMenu("字体");
 25     JMenuItem bold = new JMenuItem("加粗");
 26     JMenuItem italics = new JMenuItem("斜体");
 27     JMenu size = new JMenu("字号");
 28     JMenuItem size_18 = new JMenuItem("18");
 29     JMenuItem size_19 = new JMenuItem("19");
 30     JMenuItem size_20 = new JMenuItem("20");
 31     JMenuItem size_21 = new JMenuItem("21");
 32     JMenu color = new JMenu("颜色");
 33     final JMenuItem red = new JMenuItem("红色");
 34     JMenuItem blue = new JMenuItem("蓝色");
 35 
 36     JMenu file = new JMenu("文件");// 定义“文件”菜单项
 37     JMenuItem rebuild = new JMenuItem("新建");
 38     JMenuItem save = new JMenuItem("保存");
 39     JMenuItem open = new JMenuItem("打开");
 40     JMenuItem anotherSave = new JMenuItem("另存为");
 41     JMenuItem clear = new JMenuItem("清除");
 42     JMenuItem close = new JMenuItem("退出");
 43 
 44     JMenu edit = new JMenu("编辑");// 定义“编辑”菜单项
 45     JMenuItem cut = new JMenuItem("剪切");
 46     JMenuItem copy = new JMenuItem("复制");
 47     JMenuItem plaster = new JMenuItem("粘贴");
 48     JMenuItem all = new JMenuItem("全选");
 49 
 50     JMenu help = new JMenu("帮助");// 定义“帮助”菜单项
 51     JMenuItem about = new JMenuItem("关于");
 52 
 53     Toolkit kit = Toolkit.getDefaultToolkit();// Toolkit获得本机系统的屏幕的参数
 54     JMenuBar jmb = new JMenuBar();// 创建菜单条
 55 
 56     Text3() throws Exception {// 构造函数
 57         setTitle("记事本");
 58 
 59         // 设置快捷键
 60         bold.setAccelerator(KeyStroke.getKeyStroke("ctrl B"));
 61         italics.setAccelerator(KeyStroke.getKeyStroke("ctrl I"));
 62         rebuild.setAccelerator(KeyStroke.getKeyStroke("ctrl N"));
 63         save.setAccelerator(KeyStroke.getKeyStroke("ctrl S"));
 64         copy.setAccelerator(KeyStroke.getKeyStroke("ctrl C"));
 65         open.setAccelerator(KeyStroke.getKeyStroke("ctrl O"));
 66         cut.setAccelerator(KeyStroke.getKeyStroke("ctrl X"));
 67         plaster.setAccelerator(KeyStroke.getKeyStroke("ctrl V"));
 68         all.setAccelerator(KeyStroke.getKeyStroke("ctrl A"));
 69 
 70         add(jmb);
 71         setJMenuBar(jmb);// 设置菜单条
 72         add(area);
 73         file.add(rebuild);
 74         file.add(save);
 75         file.add(open);
 76         file.add(anotherSave);
 77         file.addSeparator();
 78         file.add(clear);
 79         file.add(close);
 80         // JScrollPane scroldPane=new JScrollPane(area); //设置滚动轴
 81         // add(scroldPane);
 82 
 83         edit.add(cut);
 84         edit.add(copy);
 85         edit.add(plaster);
 86         edit.add(all);
 87 
 88         font.add(bold);
 89         font.add(italics);
 90         size.add(size_18);
 91         size.add(size_19);
 92         size.add(size_20);
 93         size.add(size_21);
 94         color.add(red);
 95         color.add(blue);
 96         font.add(size);
 97         font.add(color);
 98         
 99         help.add(about);
100         // 添加事件
101         clear.addActionListener(new HandleAct());
102         close.addActionListener(new HandleAct());
103         bold.addActionListener(new HandleAct());
104         italics.addActionListener(new HandleAct());
105         size_18.addActionListener(new HandleAct());
106         size_19.addActionListener(new HandleAct());
107         size_20.addActionListener(new HandleAct());
108         size_21.addActionListener(new HandleAct());
109         red.addActionListener(new HandleAct());
110         blue.addActionListener(new HandleAct());
111 
112         jmb.add(file);
113         jmb.add(edit);
114         jmb.add(font);
115         jmb.add(help);
116         setSize(600, 400);// 大小信息
117         //setLocation(300, 200);// 文本框位置
118         setVisible(true);
119         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
120 
121         cb = Toolkit.getDefaultToolkit().getSystemClipboard();// 调用系统剪贴板
122         save.addActionListener(new ActionListener() {
123             public void actionPerformed(ActionEvent e) {
124                 try {
125                     saveText();
126                 } catch (Exception ex) {
127                 }
128             }
129         });
130         open.addActionListener(new ActionListener() {
131             public void actionPerformed(ActionEvent e) {
132                 try {
133                     openText();
134                 } catch (Exception ex) {
135                 }
136             }
137         });
138         rebuild.addActionListener(new ActionListener() {
139             public void actionPerformed(ActionEvent e) {
140                 try {
141                     area.setText("");
142                     name = null;
143                 } catch (Exception ex) {
144                 }
145             }
146         });
147         anotherSave.addActionListener(new ActionListener() {
148             public void actionPerformed(ActionEvent e) {
149                 anotherSaveText();
150             }
151         });
152 
153         size_18.addActionListener(new ActionListener() {
154 
155             @Override
156             public void actionPerformed(ActionEvent e) {
157                 // TODO 自动生成的方法存根
158                 Font oldF = area.getFont();// 获取当前字体
159                 String name = oldF.getName();// 获取当前字体的名字
160                 area.setFont(new Font(name, oldF.getStyle(), 18));
161             }
162         });
163 
164         cut.addActionListener(new ActionListener() // 剪切
165         {
166             public void actionPerformed(ActionEvent e) {
167                 board = area.getSelectedText();
168                 cb.setContents(new StringSelection(board), null);
169                 area.replaceRange("", area.getSelectionStart(),
170                         area.getSelectionEnd());
171             }
172         });
173         copy.addActionListener(new ActionListener() // 复制
174         {
175             public void actionPerformed(ActionEvent e) {
176                 board = area.getSelectedText();
177                 cb.setContents(new StringSelection(board), null);
178             }
179         });
180         plaster.addActionListener(new ActionListener() // 粘贴
181         {
182             public void actionPerformed(ActionEvent e) {
183                 try {
184                     Transferable content = cb.getContents(null);
185                     String st = (String) content
186                             .getTransferData(DataFlavor.stringFlavor);
187                     area.replaceRange(st, area.getSelectionStart(),
188                             area.getSelectionEnd());
189                 } catch (Exception ex) {
190                 }
191             }
192         });
193         all.addActionListener(new ActionListener() // 全选
194         {
195             public void actionPerformed(ActionEvent e) {
196                 area.setSelectionStart(0);
197                 area.setSelectionEnd(area.getText().length());
198             }
199         });
200 
201         about.addActionListener(new ActionListener() {// 帮助
202             public void actionPerformed(ActionEvent e) {
203                 JFrame frame = new JFrame("关于");
204                 frame.setSize(250, 150);
205                 frame.setLocation(400, 300);
206                 JTextArea area1 = new JTextArea("java简易文本编辑器开发人员："+‘\n‘
207                         + "彭军军 201321091103，"+‘\n‘
208                         + "鲍静瑶201321091080，"+‘\n‘
209                         + "刘瑾 201321091090.");
210                 frame.add(area1);
211                 frame.setVisible(true);
212             }
213         });
214     }
215 
216     public void openText() // 打开
217     {
218         JFileChooser chooser = new JFileChooser();
219         FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
220                 "txt", "java");
221         chooser.setFileFilter(filter);
222         chooser.setCurrentDirectory(new File("."));
223         int result = chooser.showOpenDialog(Text3.this);
224         if (result == JFileChooser.APPROVE_OPTION) {
225             name = chooser.getSelectedFile().getPath();
226             setTitle(name);
227             try {
228                 BufferedReader in = new BufferedReader(new FileReader(name));
229                 String line = null;
230                 String datas = "";
231                 while ((line = in.readLine()) != null) {
232                     if (datas == "") {
233                         datas = datas + line;
234                     } else {
235                         datas = datas + "\n" + line;
236                     }
237                 }
238                 area.setText(datas);
239                 in.close();
240             } catch (Exception ex) {
241             }
242         }
243     }
244 
245     public void saveText() // 保存
246     {
247         if (name == null) {
248             JFileChooser chooser = new JFileChooser();
249             FileNameExtensionFilter filter = new FileNameExtensionFilter(
250                     "Files", "txt", "java");// 限制扩展名，只能杜渠道txt和java类型的文件
251             chooser.setFileFilter(filter);
252             chooser.setCurrentDirectory(new File("."));
253             int result = chooser.showSaveDialog(Text3.this);
254             if (result == JFileChooser.APPROVE_OPTION) {
255                 name = chooser.getSelectedFile().getPath();
256                 try {
257                     OutputStream out = new FileOutputStream(name);
258                     String datas = area.getText();
259                     out.write(datas.getBytes());
260                     out.close();
261                 } catch (Exception ex) {
262                 }
263             }
264         } else {
265             try {
266                 OutputStream out = new FileOutputStream(name);
267                 String datas = area.getText();
268                 out.write(datas.getBytes());
269                 out.close();
270             } catch (Exception ex) {
271             }
272         }
273     }
274 
275     public void anotherSaveText() // 另存为
276     {
277         JFileChooser chooser = new JFileChooser();
278         FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
279                 "txt", "java");
280         chooser.setFileFilter(filter);
281         chooser.setCurrentDirectory(new File("."));
282         int result = chooser.showSaveDialog(Text3.this);
283         if (result == JFileChooser.APPROVE_OPTION) {
284             name = chooser.getSelectedFile().getPath();
285             try {
286                 OutputStream out = new FileOutputStream(name);
287                 String datas = area.getText();
288                 out.write(datas.getBytes());
289                 out.close();
290             } catch (Exception ex) {
291             }
292         }
293     }
294 
295     class HandleAct implements ActionListener {//内部类
296 
297         public void actionPerformed(ActionEvent e) {
298             // TODO 自动生成的方法存根
299             Font oldF = area.getFont();// 获取当前字体
300             String name = oldF.getName();// 获取当前字体的名字
301             int size = oldF.getSize();// 当前字体的大小
302             if (e.getSource() == size_18)
303                 area.setFont(new Font(name, oldF.getStyle(), 18));
304             else if (e.getSource() == size_19)
305                 area.setFont(new Font(name, oldF.getStyle(), 19));
306             else if (e.getSource() == size_20)
307                 area.setFont(new Font(name, oldF.getStyle(), 20));
308             else if (e.getSource() == size_21)
309                 area.setFont(new Font(name, oldF.getStyle(), 21));
310 
311             if (e.getSource() == red) {
312                 area.setForeground(Color.red);// 设置文字颜色
313             } else if (e.getSource() == blue) {
314                 area.setForeground(Color.blue);// 设置文字颜色
315             }
316             
317             if (e.getSource() == bold) {
318                 area.setFont(new Font(name, Font.BOLD, size));
319             } else if (e.getSource() == italics) {
320                 area.setFont(new Font(name, Font.ITALIC, size));
321             }
322             
323             if (e.getSource() == clear) {
324                 area.setText(" ");
325             } else if (e.getSource() == close) {
326                 System.exit(0);
327             }
328 
329         }
330 
331     }
332 
333 }