Java 动态向 JTable 中添加数据
2016-10-28 17:05
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1 import java.awt.Toolkit;
2 import javax.swing.SwingUtilities;
3 import javax.swing.UIManager;
4 import java.awt.Dimension;
5 public class JTableAppClass {
6 boolean packFrame = false;
7
8 public JTableAppClass() {
9 JTableAppFrame frame = new JTableAppFrame();
10 // Validate frames that have preset sizes
11 // Pack frames that have useful preferred size info, e.g. from their layout
12 if (packFrame) {
13 frame.pack();
14 } else {
15 frame.validate();
16 }
17 // Center the window
18 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
19 Dimension frameSize = frame.getSize();
20 if (frameSize.height > screenSize.height) {
21 frameSize.height = screenSize.height;
22 }
23 if (frameSize.width > screenSize.width) {
24 frameSize.width = screenSize.width;
25 }
26 frame.setLocation((screenSize.width - frameSize.width) / 2,
27 (screenSize.height - frameSize.height) / 2);
28 frame.setVisible(true);
29 }
30
31 public static void main(String[] args) {
32 SwingUtilities.invokeLater(new Runnable() {
33 public void run() {
34 try {
35 UIManager.setLookAndFeel(UIManager.
36 getSystemLookAndFeelClassName());
37 } catch (Exception exception) {
38 exception.printStackTrace();
39 }
40 new JTableAppClass();
41 }
42 });
43 }
44 }
45 操作类：JTableAppFrame.java
46 package jtabletest;
47 import java.awt.Dimension;
48 import javax.swing.JFrame;
49 import javax.swing.JPanel;
50 import javax.swing.JTable;
51 import java.awt.Rectangle;
52 import javax.swing.JScrollPane;
53 import java.util.Vector;
54 import java.sql.*;
55 import java.util.ArrayList;
56 import javax.swing.JLabel;
57 import javax.swing.JTextField;
58 import java.awt.Font;
59 import javax.swing.JButton;
60 import java.awt.event.ActionEvent;
61 import java.awt.event.ActionListener;
62 import javax.swing.JOptionPane;
63 public class JTableAppFrame extends JFrame {
64 JPanel contentPane;
65 Vector CellsVector = new Vector();
66 Vector TitleVector = new Vector();
67 JScrollPane scp = new JScrollPane();
68 JTable tab = null;
69 DBCon dbcon = new DBCon();
70 JLabel lbl_name = new JLabel();
71 JLabel lbl_age = new JLabel();
72 JLabel lbl_address = new JLabel();
73 JTextField txt_name = new JTextField();
74 JTextField txt_age = new JTextField();
75 JTextField txt_address = new JTextField();
76 JButton btn_add = new JButton();
77 JButton btn_del = new JButton();
78 JButton btn_update = new JButton();
79 JButton btn_reset = new JButton();
80 public JTableAppFrame() {
81 try {
82 setDefaultCloseOperation(EXIT_ON_CLOSE);
83 jbInit();
84 } catch (Exception exception) {
85 exception.printStackTrace();
86 }
87 }
88
89 private void jbInit() throws Exception {
90 contentPane = (JPanel) getContentPane();
91 contentPane.setLayout(null);
92 this.setResizable(false);
93 setSize(new Dimension(400, 340));
94 setTitle("JTable");
95 scp.setBounds(new Rectangle(46, 32, 297, 157));
96 lbl_name.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
97 lbl_name.setText("姓名：");
98 lbl_name.setBounds(new Rectangle(46, 205, 42, 15));
99 lbl_age.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
100 lbl_age.setText("年龄：");
101 lbl_age.setBounds(new Rectangle(200, 205, 42, 15));
102 lbl_address.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
103 lbl_address.setText("地址：");
104 lbl_address.setBounds(new Rectangle(46, 232, 42, 15));
105 txt_name.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
106 txt_name.setBounds(new Rectangle(98, 205, 72, 21));
107 txt_age.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
108 txt_age.setBounds(new Rectangle(250, 205, 72, 21));
109 txt_address.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
110 txt_address.setBounds(new Rectangle(98, 232, 72, 21));
111 btn_add.setBounds(new Rectangle(46, 271, 83, 25));
112 btn_add.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
113 btn_add.setText("添 加");
114 btn_add.addActionListener(new JTableAppFrame_btn_add_actionAdapter(this));
115 btn_del.setBounds(new Rectangle(155, 271, 83, 25));
116 btn_del.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
117 btn_del.setText("删 除");
118 btn_del.addActionListener(new JTableAppFrame_btn_del_actionAdapter(this));
119 btn_update.setBounds(new Rectangle(260, 271, 83, 25));
120 btn_update.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
121 btn_update.setText("修 改");
122 btn_update.addActionListener(new
123 JTableAppFrame_btn_update_actionAdapter(this));
124 btn_reset.setBounds(new Rectangle(258, 232, 83, 25));
125 btn_reset.setFont(new java.awt.Font("宋体", Font.BOLD, 12));
126 btn_reset.setText("重 置");
127 btn_reset.addActionListener(new JTableAppFrame_btn_reset_actionAdapter(this));
128 contentPane.add(scp);
129 contentPane.add(lbl_name);
130 contentPane.add(lbl_age);
131 contentPane.add(lbl_address);
132 contentPane.add(txt_name);
133 contentPane.add(txt_age);
134 contentPane.add(txt_address);
135 contentPane.add(btn_del);
136 contentPane.add(btn_update);
137 contentPane.add(btn_add);
138 contentPane.add(btn_reset);
139 dbcon.connectDB();
140 this.showTable();
141 tab = new JTable(CellsVector, TitleVector);
142 scp.getViewport().add(tab);
143 }
144
145 public void showTable() {
146 this.TitleVector.add("姓名");
147 this.TitleVector.add("年龄");
148 this.TitleVector.add("地址");
149 dbcon.select();
150 ArrayList list = dbcon.select();
151 for (int i = 0; i < list.size(); i++) {
152 Student stu = (Student) list.get(i);
153 Vector v = new Vector();
154 v.add(stu.getName());
155 v.add(stu.getAge());
156 v.add(stu.getAddress());
157 CellsVector.add(v);
158 }
159 }
160
161
162 String name;
163 String age;
164 String address;
165 public int checkInformation() {
166 name = this.txt_name.getText();
167 age = this.txt_age.getText();
168 address = this.txt_address.getText();
169 if (name.equals("")) {
170 JOptionPane.showMessageDialog(this, "您好！请输入姓名！", "提示", 1);
171 this.txt_name.grabFocus();
172 return 0;
173 }
174 if (age.equals("")) {
175 JOptionPane.showMessageDialog(this, "您好！请输入年龄！", "提示", 1);
176 this.txt_age.grabFocus();
177 return 0;
178 }
179 char[] ans = age.toCharArray();
180 for (int i = 0; i < ans.length; i++) {
181 if (!Character.isDigit(ans[i])) {
182 JOptionPane.showMessageDialog(this, "您好！年龄输入错误！", "提示", 1);
183 this.txt_age.setText("");
184 this.txt_age.grabFocus();
185 return 0;
186 }
187 }
188 if (age.length() > 3) {
189 JOptionPane.showMessageDialog(this, "您好！年龄最高只能为 100 岁！", "提示", 1);
190 this.txt_age.setText("");
191 this.txt_age.grabFocus();
192 return 0;
193 }
194 if (address.equals("")) {
195 JOptionPane.showMessageDialog(this, "您好！请输入地址！", "提示", 1);
196 this.txt_address.grabFocus();
197 return 0;
198 }
199 ages = Integer.valueOf(age);
200 return 1;
201 }
202
203 int ages;
204 public void btn_add_actionPerformed(ActionEvent e) {
205 if (this.checkInformation() == 0) {
206 return;
207 }
208 dbcon.insert(name, ages, address);
209 this.CellsVector.clear();
210 this.showTable();
211 this.tab.updateUI();
212 this.btn_reset_actionPerformed(e);
213 }
214
215 ResultSet rs;
216 public void btn_del_actionPerformed(ActionEvent e) {
217 String name = this.txt_name.getText();
218 this.txt_age.setEditable(false);
219 this.txt_address.setEditable(false);
220 if (name.equals("")) {
221 JOptionPane.showMessageDialog(this, "您好！请输入姓名！", "提示", 1);
222 this.txt_name.grabFocus();
223 return;
224 }
225 try {
226 String sql = "select * from Student where name=?";
227 PreparedStatement ps = DBCon.con.prepareStatement(sql);
228 ps.setString(1, name);
229 rs = ps.executeQuery();
230 if (rs.next()) {
231 ps.close();
232 dbcon.delete(name);
233 this.CellsVector.clear();
234 this.showTable();
235 this.tab.updateUI();
236 this.btn_reset_actionPerformed(e);
237 } else {
238 JOptionPane.showMessageDialog(this, "您好！该学员不存在！", "提示", 1);
239 this.btn_reset_actionPerformed(e);
240 return;
241 }
242 } catch (SQLException ex) {
243 System.out.println("核对学员信息发生异常" + ex.getMessage());
244 }
245 }
246
247 public void btn_update_actionPerformed(ActionEvent e) {
248 if (this.checkInformation() == 0) {
249 return;
250 }
251 try {
252 String sql = "select * from Student where name=?";
253 PreparedStatement ps = DBCon.con.prepareStatement(sql);
254 ps.setString(1, name);
255 rs = ps.executeQuery();
256 if (rs.next()) {
257 ps.close();
258 dbcon.update(name, ages, address);
259 this.CellsVector.clear();
260 this.showTable();
261 this.tab.updateUI();
262 this.btn_reset_actionPerformed(e);
263 } else {
264 JOptionPane.showMessageDialog(this, "您好！该学员不存在！", "提示", 1);
265 this.btn_reset_actionPerformed(e);
266 return;
267 }
268 } catch (SQLException ex) {
269 System.out.println("核对学员信息发生异常" + ex.getMessage());
270 }
271 }
272
273 public void btn_reset_actionPerformed(ActionEvent e) {
274 this.txt_name.setText("");
275 this.txt_age.setText("");
276 this.txt_address.setText("");
277 this.txt_age.setEditable(true);
278 this.txt_address.setEditable(true);
279 }
280 }
281
282 class JTableAppFrame_btn_del_actionAdapter implements ActionListener {
283 private JTableAppFrame adaptee;
284 JTableAppFrame_btn_del_actionAdapter(JTableAppFrame adaptee) {
285 this.adaptee = adaptee;
286 }
287 public void actionPerformed(ActionEvent e) {
288 adaptee.btn_del_actionPerformed(e);
289 }
290 }
291
292 class JTableAppFrame_btn_update_actionAdapter implements ActionListener {
293 private JTableAppFrame adaptee;
294 JTableAppFrame_btn_update_actionAdapter(JTableAppFrame adaptee) {
295 this.adaptee = adaptee;
296 }
297 public void actionPerformed(ActionEvent e) {
298 adaptee.btn_update_actionPerformed(e);
299 }
300 }
301
302 class JTableAppFrame_btn_reset_actionAdapter implements ActionListener {
303 private JTableAppFrame adaptee;
304 JTableAppFrame_btn_reset_actionAdapter(JTableAppFrame adaptee) {
305 this.adaptee = adaptee;
306 }
307 public void actionPerformed(ActionEvent e) {
308 adaptee.btn_reset_actionPerformed(e);
309 }
310 }
311
312 class JTableAppFrame_btn_add_actionAdapter implements ActionListener {
313 private JTableAppFrame adaptee;
314 JTableAppFrame_btn_add_actionAdapter(JTableAppFrame adaptee) {
315 this.adaptee = adaptee;
316 }
317 public void actionPerformed(ActionEvent e) {
318 adaptee.btn_add_actionPerformed(e);
319 }
320 }
321 连接数据库类：DBCon.java
322 package jtabletest;
323 import java.sql.*;
324 import java.util.ArrayList;
325 import javax.swing.JOptionPane;
326 public class DBCon {
327 static Connection con;
328 private final String DRIVER = "sun.jdbc.odbc.JdbcOdbcDriver";
329 private final String URL = "jdbc:odbc:test";
330 ResultSet rs = null;
331 Statement st = null;
332 public DBCon() {
333 }
334
335 public void connectDB() {
336 try {
337 Class.forName(DRIVER);
338 } catch (ClassNotFoundException ex) {
339 System.out.println(ex.getMessage());
340 }
341 if (con == null) {
342 try {
343 con = DriverManager.getConnection(URL);
344 } catch (SQLException ex) {
345 System.out.println("创建连接发生异常:" + ex.getMessage());
346 System.exit(0);
347 }
348 }
349 }
350
351 public ArrayList select() {
352 ArrayList list = new ArrayList();
353 String sql = "select * from Student";
354 try {
355 st = con.createStatement();
356 rs = st.executeQuery(sql);
357 while (rs.next()) {
358 Student stu = new Student();
359 stu.setName(rs.getString(2));
360 stu.setAge(rs.getInt(3));
361 stu.setAddress(rs.getString(4));
362 list.add(stu);
363 }
364 } catch (SQLException ex) {
365 System.out.println("查询数据发生异常:" + ex.getMessage());
366 } finally {
367 try {
368 rs.close();
369 } catch (SQLException ex1) {
370 System.out.println("查询数据关闭语句异常:" + ex1.getMessage());
371 }
372 }
373 return list;
374 }
375
376 public void insert(String name, int age, String address) {
377 String sql = "insert into Student values(?,?,?)";
378 PreparedStatement ps = null;
379 try {
380 ps = con.prepareStatement(sql);
381 ps.setString(1, name);
382 ps.setInt(2, age);
383 ps.setString(3, address);
384 if (ps.executeUpdate() != 0) {
385 JOptionPane.showMessageDialog(null, "恭喜！插入数据成功！", "消息", 1);
386 }
387 } catch (SQLException ex) {
388 System.out.println("插入数据发生异常:" + ex.getMessage());
389 } finally {
390 try {
391 ps.close();
392 } catch (SQLException ex1) {
393 System.out.println("插入数据关闭语句异常:" + ex1.getMessage());
394 }
395 }
396 }
397
398 public void update(String name, int age, String address) {
399 String sql = "update Student set age = ?,address = ? where name =?";
400 PreparedStatement ps = null;
401 try {
402 ps = con.prepareStatement(sql);
403 ps.setInt(1, age);
404 ps.setString(2, address);
405 ps.setString(3, name);
406 if (ps.executeUpdate() != 0) {
407 JOptionPane.showMessageDialog(null, "恭喜！更新数据成功！", "消息", 1);
408 }
409 } catch (SQLException ex) {
410 System.out.println("修改数据发生异常!");
411 } finally {
412 try {
413 ps.close();
414 } catch (SQLException ex1) {
415 System.out.println("修改数据关闭语句异常:" + ex1.getMessage());
416 }
417 }
418 }
419
420 public void delete(String name) {
421 String sql = "delete from Student where name =?";
422 PreparedStatement ps = null;
423 int delNumber;
424 try {
425 ps = con.prepareStatement(sql);
426 ps.setString(1, name);
427 delNumber = ps.executeUpdate();
428 if (delNumber != 0) {
429 JOptionPane.showMessageDialog(null, "恭喜！删除数据成功！", "消息", 1);
430 }
431 } catch (SQLException ex) {
432 System.out.println("删除数据发生异常:" + ex.getMessage());
433 } finally {
434 try {
435 ps.close();
436 } catch (SQLException ex1) {
437 System.out.println("删除数据关闭语句异常:" + ex1.getMessage());
438 }
439 }
440 }
441
442 public void destoryConnection() {
443 if (con != null) {
444 try {
445 con.close();
446 } catch (SQLException ex) {
447 System.out.println("释放连接异常：" + ex.getMessage());
448 }
449 }
450 }
451 }
452 JavaBean 类：Student.java
453 package jtabletest;
454 public class Student {
455 private String name;
456 private int age;
457 private String address;
458 public Student() {
459 }
460 public void setName(String name) {
461 this.name = name;
462 }
463 public void setAge(int age) {
464 this.age = age;
465 }
466 public void setAddress(String address) {
467 this.address = address;
468 }
469 public String getName() {
470 return name;
471 }
472 public int getAge() {
473 return age;
474 }
475 public String getAddress() {
476 return address;
477 }
478 }
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