1 package peng_jun;
2
3 import java.awt.*;
4 import java.awt.event.*;
5 import javax.swing.*;
6 import javax.swing.event.*;
7 import java.util.*;
8 import java.io.*;
9 import javax.swing.filechooser.*;
10 import javax.swing.filechooser.FileFilter;
11 import java.awt.datatransfer.*;
12
13 public class Text extends JFrame {
14 TextArea area;//文本域
15 String name = null;//文件名
16 String board = null;
17 private Clipboard cb;//系统粘贴板
18
19 Text() throws Exception {//构造函数
20 setTitle("记事本");
21 Toolkit kit = Toolkit.getDefaultToolkit();//Toolkit获得本机系统的屏幕的参数
22 //Image img = kit.getImage("01.jpg");
23 //setIconImage(img);
24
25
26 JMenuBar jmb = new JMenuBar();//创建菜单条
27 add(jmb);
28 setJMenuBar(jmb);
29 area = new TextArea();
30 add(area);
31
32 JMenu file = new JMenu("文件");//定义“文件”菜单项
33 JMenuItem rebuild = new JMenuItem("新建");
34 rebuild.setAccelerator(KeyStroke.getKeyStroke("ctrl N"));
35 JMenuItem save = new JMenuItem("保存");
36 save.setAccelerator(KeyStroke.getKeyStroke("ctrl S"));
37 JMenuItem open = new JMenuItem("打开");
38 open.setAccelerator(KeyStroke.getKeyStroke("ctrl O"));
39 JMenuItem anotherSave = new JMenuItem("另存为");
40 file.add(rebuild);
41 file.add(save);
42 file.add(open);
43 file.add(anotherSave);
44 // JScrollPane scroldPane=new JScrollPane(area); //设置滚动轴
45 // add(scroldPane);
46 JMenu edit = new JMenu("编辑");//定义“编辑”菜单项
47 JMenuItem cut = new JMenuItem("剪切");
48 cut.setAccelerator(KeyStroke.getKeyStroke("ctrl X"));
49 JMenuItem copy = new JMenuItem("复制");
50 copy.setAccelerator(KeyStroke.getKeyStroke("ctrl C"));
51 JMenuItem plaster = new JMenuItem("粘贴");
52 plaster.setAccelerator(KeyStroke.getKeyStroke("ctrl V"));
53 JMenuItem all = new JMenuItem("全选");
54 all.setAccelerator(KeyStroke.getKeyStroke("ctrl A"));
55 edit.add(cut);
56 edit.add(copy);
57 edit.add(plaster);
58 edit.add(all);
59 JMenu help = new JMenu("帮助");//定义“帮助”菜单项
60 JMenuItem about = new JMenuItem("关于");
61 help.add(about);
62
63 jmb.add(file);
64 jmb.add(edit);
65 jmb.add(help);
66 setSize(600, 400);
67 //setLocation(300, 200);
68 setVisible(true);
69 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
70
71 cb = Toolkit.getDefaultToolkit().getSystemClipboard();//调用系统剪贴板
72 save.addActionListener(new ActionListener() {
73 public void actionPerformed(ActionEvent e) {
74 try {
75 saveText();
76 } catch (Exception ex) {
77 }
78 }
79 });
80 open.addActionListener(new ActionListener() {
81 public void actionPerformed(ActionEvent e) {
82 try {
83 openText();
84 } catch (Exception ex) {
85 }
86 }
87 });
88 rebuild.addActionListener(new ActionListener() {
89 public void actionPerformed(ActionEvent e) {
90 try {
91 area.setText("");
92 name = null;
93 } catch (Exception ex) {
94 }
95 }
96 });
97 anotherSave.addActionListener(new ActionListener() {
98 public void actionPerformed(ActionEvent e) {
99 anotherSaveText();
100 }
101 });
102
103 cut.addActionListener(new ActionListener() // 剪切
104 {
105 public void actionPerformed(ActionEvent e) {
106 board = area.getSelectedText();
107 cb.setContents(new StringSelection(board), null);
108 area.replaceRange("", area.getSelectionStart(),
109 area.getSelectionEnd());
110 }
111 });
112 copy.addActionListener(new ActionListener() // 复制
113 {
114 public void actionPerformed(ActionEvent e) {
115 board = area.getSelectedText();
116 cb.setContents(new StringSelection(board), null);
117 }
118 });
119 plaster.addActionListener(new ActionListener() // 粘贴
120 {
121 public void actionPerformed(ActionEvent e) {
122 try {
123 Transferable content = cb.getContents(null);
124 String st = (String) content
125 .getTransferData(DataFlavor.stringFlavor);
126 area.replaceRange(st, area.getSelectionStart(),
127 area.getSelectionEnd());
128 } catch (Exception ex) {
129 }
130 }
131 });
132 all.addActionListener(new ActionListener() // 全选
133 {
134 public void actionPerformed(ActionEvent e) {
135 area.setSelectionStart(0);
136 area.setSelectionEnd(area.getText().length());
137 }
138 });
139 about.addActionListener(new ActionListener() {//帮助
140 public void actionPerformed(ActionEvent e) {
141 JFrame frame = new JFrame("关于");
142 frame.setSize(150, 100);
143 frame.setLocation(400, 300);
144 JTextArea area1 = new JTextArea("java简易文本编辑器");
145 frame.add(area1);
146 frame.setVisible(true);
147 }
148 });
149 }
150
151 public void openText() // 打开
152 {
153 JFileChooser chooser = new JFileChooser();
154 FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
155 "txt", "java");
156 chooser.setFileFilter(filter);
157 chooser.setCurrentDirectory(new File("."));
158 int result = chooser.showOpenDialog(Text.this);
159 if (result == JFileChooser.APPROVE_OPTION) {
160 name = chooser.getSelectedFile().getPath();
161 setTitle(name);
162 try {
163 BufferedReader in = new BufferedReader(new FileReader(name));
164 String line = null;
165 String datas = "";
166 while ((line = in.readLine()) != null) {
167 if (datas == "") {
168 datas = datas + line;
169 } else {
170 datas = datas + "\n" + line;
171 }
172 }
173 area.setText(datas);
174 in.close();
175 } catch (Exception ex) {
176 }
177 }
178 }
179
180 public void saveText() // 保存
181 {
182 if (name == null) {
183 JFileChooser chooser = new JFileChooser();
184 FileNameExtensionFilter filter = new FileNameExtensionFilter(
185 "Files", "txt", "java");
186 chooser.setFileFilter(filter);
187 chooser.setCurrentDirectory(new File("."));
188 int result = chooser.showSaveDialog(Text.this);
189 if (result == JFileChooser.APPROVE_OPTION) {
190 name = chooser.getSelectedFile().getPath();
191 try {
192 OutputStream out = new FileOutputStream(name);
193 String datas = area.getText();
194 out.write(datas.getBytes());
195 out.close();
196 } catch (Exception ex) {
197 }
198 }
199 } else {
200 try {
201 OutputStream out = new FileOutputStream(name);
202 String datas = area.getText();
203 out.write(datas.getBytes());
204 out.close();
205 } catch (Exception ex) {
206 }
207 }
208 }
209
210 public void anotherSaveText() // 另存为
211 {
212 JFileChooser chooser = new JFileChooser();
213 FileNameExtensionFilter filter = new FileNameExtensionFilter("Files",
214 "txt", "java");
215 chooser.setFileFilter(filter);
216 chooser.setCurrentDirectory(new File("."));
217 int result = chooser.showSaveDialog(Text.this);
218 if (result == JFileChooser.APPROVE_OPTION) {
219 name = chooser.getSelectedFile().getPath();
220 try {
221 OutputStream out = new FileOutputStream(name);
222 String datas = area.getText();
223 out.write(datas.getBytes());
224 out.close();
225 } catch (Exception ex) {
226 }
227 }
228 }
229
230 public static void main(String[] args) throws Exception {
231 new Text();
232 }
233 }
时间： 2024-10-09 10:36:43