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 Text4 extends JFrame {
15 public static void main(String[] args) throws Exception {
16 new Text4();
17 }
18
19 JTextArea area = new JTextArea();;// 文本域
20 String name = null;// 文件名
21 String board = null;
22 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
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 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 JMenuItem replice = new JMenuItem("替换");
50 JMenuItem check = new JMenuItem("查找");
51
52 JMenu help = new JMenu("帮助");// 定义“帮助”菜单项
53 JMenuItem about = new JMenuItem("关于");
54
55 Toolkit kit = Toolkit.getDefaultToolkit();// Toolkit获得本机系统的屏幕的参数
56 JMenuBar jmb = new JMenuBar();// 创建菜单条
57
58 Text4() throws Exception {// 构造函数
59 setTitle("记事本");
60
61 // 设置快捷键
62 bold.setAccelerator(KeyStroke.getKeyStroke("ctrl B"));
63 italics.setAccelerator(KeyStroke.getKeyStroke("ctrl I"));
64 rebuild.setAccelerator(KeyStroke.getKeyStroke("ctrl N"));
65 save.setAccelerator(KeyStroke.getKeyStroke("ctrl S"));
66 copy.setAccelerator(KeyStroke.getKeyStroke("ctrl C"));
67 open.setAccelerator(KeyStroke.getKeyStroke("ctrl O"));
68 cut.setAccelerator(KeyStroke.getKeyStroke("ctrl X"));
69 plaster.setAccelerator(KeyStroke.getKeyStroke("ctrl V"));
70 all.setAccelerator(KeyStroke.getKeyStroke("ctrl A"));
71 replice.setAccelerator(KeyStroke.getKeyStroke("ctrl H"));
72 check.setAccelerator(KeyStroke.getKeyStroke("ctrl F"));
73
74
75 add(jmb);
76 setJMenuBar(jmb);// 设置菜单条
77 add(area);
78 file.add(rebuild);
79 file.add(save);
80 file.add(open);
81 file.add(anotherSave);
82 file.addSeparator();
83 file.add(clear);
84 file.add(close);
85 // JScrollPane scroldPane=new JScrollPane(area); //设置滚动轴
86 // add(scroldPane);
87
88 edit.add(cut);
89 edit.add(copy);
90 edit.add(plaster);
91 edit.add(all);
92 edit.addSeparator();
93 edit.add(replice);
94 edit.add(check);
95
96 font.add(bold);
97 font.add(italics);
98 size.add(size_18);
99 size.add(size_19);
100 size.add(size_20);
101 size.add(size_21);
102 color.add(red);
103 color.add(blue);
104 font.add(size);
105 font.add(color);
106
107 help.add(about);
108 // 添加事件
109 clear.addActionListener(new HandleAct());
110 close.addActionListener(new HandleAct());
111 bold.addActionListener(new HandleAct());
112 italics.addActionListener(new HandleAct());
113 size_18.addActionListener(new HandleAct());
114 size_19.addActionListener(new HandleAct());
115 size_20.addActionListener(new HandleAct());
116 size_21.addActionListener(new HandleAct());
117 red.addActionListener(new HandleAct());
118 blue.addActionListener(new HandleAct());
119 replice.addActionListener(new HandleAct());
120 check.addActionListener(new HandleAct());
121
122 jmb.add(file);
123 jmb.add(edit);
124 jmb.add(font);
125 jmb.add(help);
126 setSize(600, 400);// 大小信息
127 // setLocation(300, 200);// 文本框位置
128 setVisible(true);
129 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
130
131 cb = Toolkit.getDefaultToolkit().getSystemClipboard();// 调用系统剪贴板
132 save.addActionListener(new ActionListener() {
133 public void actionPerformed(ActionEvent e) {
134 try {
135 saveText();
136 } catch (Exception ex) {
137 }
138 }
139 });
140 open.addActionListener(new ActionListener() {
141 public void actionPerformed(ActionEvent e) {
142 try {
143 openText();
144 } catch (Exception ex) {
145 }
146 }
147 });
148 rebuild.addActionListener(new ActionListener() {
149 public void actionPerformed(ActionEvent e) {
150 try {
151 area.setText("");
152 name = null;
153 } catch (Exception ex) {
154 }
155 }
156 });
157 anotherSave.addActionListener(new ActionListener() {
158 public void actionPerformed(ActionEvent e) {
159 anotherSaveText();
160 }
161 });
162
163 size_18.addActionListener(new ActionListener() {
164
165 @Override
166 public void actionPerformed(ActionEvent e) {
167 // TODO 自动生成的方法存根
168 Font oldF = area.getFont();// 获取当前字体
169 String name = oldF.getName();// 获取当前字体的名字
170 area.setFont(new Font(name, oldF.getStyle(), 18));
171 }
172 });
173
174 cut.addActionListener(new ActionListener() // 剪切
175 {
176 public void actionPerformed(ActionEvent e) {
177 board = area.getSelectedText();
178 cb.setContents(new StringSelection(board), null);
179 area.replaceRange("", area.getSelectionStart(),
180 area.getSelectionEnd());
181 }
182 });
183 copy.addActionListener(new ActionListener() // 复制
184 {
185 public void actionPerformed(ActionEvent e) {
186 board = area.getSelectedText();
187 cb.setContents(new StringSelection(board), null);
188 }
189 });
190 plaster.addActionListener(new ActionListener() // 粘贴
191 {
192 public void actionPerformed(ActionEvent e) {
193 try {
194 Transferable content = cb.getContents(null);
195 String st = (String) content
196 .getTransferData(DataFlavor.stringFlavor);
197 area.replaceRange(st, area.getSelectionStart(),
198 area.getSelectionEnd());
199 } catch (Exception ex) {
200 }
201 }
202 });
203 all.addActionListener(new ActionListener() // 全选
204 {
205 public void actionPerformed(ActionEvent e) {
206 area.setSelectionStart(0);
207 area.setSelectionEnd(area.getText().length());
208 }
209 });
210
211 about.addActionListener(new ActionListener() {// 帮助
212 public void actionPerformed(ActionEvent e) {
213 JFrame frame = new JFrame("关于");
214 frame.setSize(250, 150);
215 frame.setLocation(400, 300);
216 JTextArea area1 = new JTextArea("java简易文本编辑器开发人员：" + '\n'
217 + "彭军军 201321091103，" + '\n' + "鲍静瑶201321091080，"
218 + '\n' + "刘瑾 201321091081.");
219 frame.add(area1);
220 frame.setVisible(true);
221 }
222 });
223 }
224
225 public void openText() // 打开
226 {
227 /*
228 * 在选择文件方法中，首先创建JFileChooser文件选择器，
229 * 使用JFileChooser类的setFileFilter（）方法创建文件扩展名过滤器，再使用JFileChooser类
230 * 的setFileSelectionMode（）方法设置文件选择模式为文件，
231 * 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，
232 * 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，
233 * 使用JTextField类的setText()方法显示文件信息到文本框。
234 */
235 JFileChooser chooser = new JFileChooser();//创建JFileChooser文件选择器
236 FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
237 "txt", "java","html","css","js");//文件过滤器
238 chooser.setFileFilter(filter);
239 chooser.setCurrentDirectory(new File("."));
240 int result = chooser.showOpenDialog(Text4.this);//打开当前文件夹
241 if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
242 name = chooser.getSelectedFile().getPath();//获取文件对象
243 setTitle(name);
244 try {
245 BufferedReader in = new BufferedReader(new FileReader(name));
246 String line = null;
247 String datas = "";//保存数据
248 //用while循环来判断读取是否结束 此处用的是行读取
249 while ((line = in.readLine()) != null) {
250 if (datas == "") {
251 datas = datas + line;
252 } else {
253 datas = datas + "\n" + line;
254 }
255 }
256 area.setText(datas);
257 in.close();
258 } catch (Exception ex) {
259 }
260 }
261 }
262
263 public void saveText() // 保存
264 {
265 if (name == null) {
266 JFileChooser chooser = new JFileChooser();
267 FileNameExtensionFilter filter = new FileNameExtensionFilter(
268 "Files", "txt", "java");// 限制扩展名，只能杜渠道txt和java类型的文件
269 chooser.setFileFilter(filter);
270 chooser.setCurrentDirectory(new File("."));//设置当前目录
271 int result = chooser.showSaveDialog(Text4.this);
272 if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
273 name = chooser.getSelectedFile().getPath();
274 try {
275 OutputStream out = new FileOutputStream(name);
276 String datas = area.getText();
277 out.write(datas.getBytes());
278 out.close();
279 } catch (Exception ex) {
280 }
281 }
282 }
283 }
284
285 public void anotherSaveText() // 另存为
286 {
287 JFileChooser chooser = new JFileChooser();
288 FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
289 "txt", "java","html","js","css");
290 chooser.setFileFilter(filter);
291 chooser.setCurrentDirectory(new File("."));
292 int result = chooser.showSaveDialog(Text4.this);
293 if (result == JFileChooser.APPROVE_OPTION) {//用户按下了yes
294 name = chooser.getSelectedFile().getPath();
295 try {
296 OutputStream out = new FileOutputStream(name);
297 String datas = area.getText();
298 out.write(datas.getBytes());
299 out.close();
300 } catch (Exception ex) {
301 }
302 }
303 }
304
305 class HandleAct implements ActionListener {// 内部类
306
307 public void actionPerformed(ActionEvent e) {
308 // TODO 自动生成的方法存根
309 Font oldF = area.getFont();// 获取当前字体
310 String name = oldF.getName();// 获取当前字体的名字
311 int size = oldF.getSize();// 当前字体的大小
312 if (e.getSource() == size_18)
313 area.setFont(new Font(name, oldF.getStyle(), 18));
314 else if (e.getSource() == size_19)
315 area.setFont(new Font(name, oldF.getStyle(), 19));
316 else if (e.getSource() == size_20)
317 area.setFont(new Font(name, oldF.getStyle(), 20));
318 else if (e.getSource() == size_21)
319 area.setFont(new Font(name, oldF.getStyle(), 21));
320
321 if (e.getSource() == red) {
322 area.setForeground(Color.red);// 设置文字颜色
323 } else if (e.getSource() == blue) {
324 area.setForeground(Color.blue);// 设置文字颜色
325 }
326
327 if (e.getSource() == bold) {
328 area.setFont(new Font(name, Font.BOLD, size));
329 } else if (e.getSource() == italics) {
330 area.setFont(new Font(name, Font.ITALIC, size));
331 }
332
333 if (e.getSource() == clear) {
334 area.setText(" ");
335 } else if (e.getSource() == close) {
336 System.exit(0);
337 }
338
339 if (e.getSource() == replice) {
340 //替换弹出框的布局
341 JPanel replacePanel = new JPanel();
342 JLabel lookupLabel = new JLabel("要替换的内容");
343 JTextField inputText = new JTextField(10);
344 JLabel replaceLabel = new JLabel("替换为");
345 JTextField changetoText = new JTextField(10);
346 replacePanel.add(lookupLabel);
347 replacePanel.add(inputText);
348 replacePanel.add(replaceLabel);
349 replacePanel.add(changetoText);
350 //布局结束
351 JOptionPane.showMessageDialog(null, replacePanel);
352 String text = area.getText();//获得整个文本内容
353 String changeText = text.replace(inputText.getText(),
354 changetoText.getText());//启用replace功能函数
355 area.setText(changeText);
356 }
357 else if (e.getSource() == check) {
358 //查找弹出框的布局
359 JPanel swapPanel=new JPanel();
360 JLabel seekLabel=new JLabel("要查找的内容");
361 JTextField inputText=new JTextField(20);
362 swapPanel.add(seekLabel);
363 swapPanel.add(inputText);
364 JOptionPane.showMessageDialog(null,swapPanel);
365 //布局结束
366 String text=area.getText();//获得整个文本内容
367 int fromIndex=area.getCaretPosition();//取得当前的光标位置
368 int lastfromIndex=text.lastIndexOf(inputText.getText(),fromIndex);//获得查找后的位置
369 area.setCaretPosition(lastfromIndex);
370 area.moveCaretPosition(lastfromIndex+inputText.getText().length());//使查找到的子字符串显示出来
371 }
372
373 }
374
375 }
376
377 }
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