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Java 动态向 JTable 中添加数据
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import java.awt.Toolkit;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import java.awt.Dimension;
public class JTableAppClass {
boolean packFrame = false; public JTableAppClass() {
JTableAppFrame frame = new JTableAppFrame();
// Validate frames that have preset sizes
// Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
} else {
frame.validate();
}
// Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / ,
(screenSize.height - frameSize.height) / );
frame.setVisible(true);
} public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.
getSystemLookAndFeelClassName());
} catch (Exception exception) {
exception.printStackTrace();
}
new JTableAppClass();
}
});
}
}
操作类：JTableAppFrame.java
package jtabletest;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import java.awt.Rectangle;
import javax.swing.JScrollPane;
import java.util.Vector;
import java.sql.*;
import java.util.ArrayList;
import javax.swing.JLabel;
import javax.swing.JTextField;
import java.awt.Font;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;
public class JTableAppFrame extends JFrame {
JPanel contentPane;
Vector CellsVector = new Vector();
Vector TitleVector = new Vector();
JScrollPane scp = new JScrollPane();
JTable tab = null;
DBCon dbcon = new DBCon();
JLabel lbl_name = new JLabel();
JLabel lbl_age = new JLabel();
JLabel lbl_address = new JLabel();
JTextField txt_name = new JTextField();
JTextField txt_age = new JTextField();
JTextField txt_address = new JTextField();
JButton btn_add = new JButton();
JButton btn_del = new JButton();
JButton btn_update = new JButton();
JButton btn_reset = new JButton();
public JTableAppFrame() {
try {
setDefaultCloseOperation(EXIT_ON_CLOSE);
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
} private void jbInit() throws Exception {
contentPane = (JPanel) getContentPane();
contentPane.setLayout(null);
this.setResizable(false);
setSize(new Dimension(, ));
setTitle("JTable");
scp.setBounds(new Rectangle(, , , ));
lbl_name.setFont(new java.awt.Font("宋体", Font.BOLD, ));
lbl_name.setText("姓名：");
lbl_name.setBounds(new Rectangle(, , , ));
lbl_age.setFont(new java.awt.Font("宋体", Font.BOLD, ));
lbl_age.setText("年龄：");
lbl_age.setBounds(new Rectangle(, , , ));
lbl_address.setFont(new java.awt.Font("宋体", Font.BOLD, ));
lbl_address.setText("地址：");
lbl_address.setBounds(new Rectangle(, , , ));
txt_name.setFont(new java.awt.Font("宋体", Font.BOLD, ));
txt_name.setBounds(new Rectangle(, , , ));
txt_age.setFont(new java.awt.Font("宋体", Font.BOLD, ));
txt_age.setBounds(new Rectangle(, , , ));
txt_address.setFont(new java.awt.Font("宋体", Font.BOLD, ));
txt_address.setBounds(new Rectangle(, , , ));
btn_add.setBounds(new Rectangle(, , , ));
btn_add.setFont(new java.awt.Font("宋体", Font.BOLD, ));
btn_add.setText("添 加");
btn_add.addActionListener(new JTableAppFrame_btn_add_actionAdapter(this));
btn_del.setBounds(new Rectangle(, , , ));
btn_del.setFont(new java.awt.Font("宋体", Font.BOLD, ));
btn_del.setText("删 除");
btn_del.addActionListener(new JTableAppFrame_btn_del_actionAdapter(this));
btn_update.setBounds(new Rectangle(, , , ));
btn_update.setFont(new java.awt.Font("宋体", Font.BOLD, ));
btn_update.setText("修 改");
btn_update.addActionListener(new
JTableAppFrame_btn_update_actionAdapter(this));
btn_reset.setBounds(new Rectangle(, , , ));
btn_reset.setFont(new java.awt.Font("宋体", Font.BOLD, ));
btn_reset.setText("重 置");
btn_reset.addActionListener(new JTableAppFrame_btn_reset_actionAdapter(this));
contentPane.add(scp);
contentPane.add(lbl_name);
contentPane.add(lbl_age);
contentPane.add(lbl_address);
contentPane.add(txt_name);
contentPane.add(txt_age);
contentPane.add(txt_address);
contentPane.add(btn_del);
contentPane.add(btn_update);
contentPane.add(btn_add);
contentPane.add(btn_reset);
dbcon.connectDB();
this.showTable();
tab = new JTable(CellsVector, TitleVector);
scp.getViewport().add(tab);
} public void showTable() {
this.TitleVector.add("姓名");
this.TitleVector.add("年龄");
this.TitleVector.add("地址");
dbcon.select();
ArrayList list = dbcon.select();
for (int i = ; i < list.size(); i++) {
Student stu = (Student) list.get(i);
Vector v = new Vector();
v.add(stu.getName());
v.add(stu.getAge());
v.add(stu.getAddress());
CellsVector.add(v);
}
} String name;
String age;
String address;
public int checkInformation() {
name = this.txt_name.getText();
age = this.txt_age.getText();
address = this.txt_address.getText();
if (name.equals("")) {
JOptionPane.showMessageDialog(this, "您好！请输入姓名！", "提示", );
this.txt_name.grabFocus();
return ;
}
if (age.equals("")) {
JOptionPane.showMessageDialog(this, "您好！请输入年龄！", "提示", );
this.txt_age.grabFocus();
return ;
}
char[] ans = age.toCharArray();
for (int i = ; i < ans.length; i++) {
if (!Character.isDigit(ans[i])) {
JOptionPane.showMessageDialog(this, "您好！年龄输入错误！", "提示", );
this.txt_age.setText("");
this.txt_age.grabFocus();
return ;
}
}
if (age.length() > ) {
JOptionPane.showMessageDialog(this, "您好！年龄最高只能为 100 岁！", "提示", );
this.txt_age.setText("");
this.txt_age.grabFocus();
return ;
}
if (address.equals("")) {
JOptionPane.showMessageDialog(this, "您好！请输入地址！", "提示", );
this.txt_address.grabFocus();
return ;
}
ages = Integer.valueOf(age);
return ;
} int ages;
public void btn_add_actionPerformed(ActionEvent e) {
if (this.checkInformation() == ) {
return;
}
dbcon.insert(name, ages, address);
this.CellsVector.clear();
this.showTable();
this.tab.updateUI();
this.btn_reset_actionPerformed(e);
} ResultSet rs;
public void btn_del_actionPerformed(ActionEvent e) {
String name = this.txt_name.getText();
this.txt_age.setEditable(false);
this.txt_address.setEditable(false);
if (name.equals("")) {
JOptionPane.showMessageDialog(this, "您好！请输入姓名！", "提示", );
this.txt_name.grabFocus();
return;
}
try {
String sql = "select * from Student where name=?";
PreparedStatement ps = DBCon.con.prepareStatement(sql);
ps.setString(, name);
rs = ps.executeQuery();
if (rs.next()) {
ps.close();
dbcon.delete(name);
this.CellsVector.clear();
this.showTable();
this.tab.updateUI();
this.btn_reset_actionPerformed(e);
} else {
JOptionPane.showMessageDialog(this, "您好！该学员不存在！", "提示", );
this.btn_reset_actionPerformed(e);
return;
}
} catch (SQLException ex) {
System.out.println("核对学员信息发生异常" + ex.getMessage());
}
} public void btn_update_actionPerformed(ActionEvent e) {
if (this.checkInformation() == ) {
return;
}
try {
String sql = "select * from Student where name=?";
PreparedStatement ps = DBCon.con.prepareStatement(sql);
ps.setString(, name);
rs = ps.executeQuery();
if (rs.next()) {
ps.close();
dbcon.update(name, ages, address);
this.CellsVector.clear();
this.showTable();
this.tab.updateUI();
this.btn_reset_actionPerformed(e);
} else {
JOptionPane.showMessageDialog(this, "您好！该学员不存在！", "提示", );
this.btn_reset_actionPerformed(e);
return;
}
} catch (SQLException ex) {
System.out.println("核对学员信息发生异常" + ex.getMessage());
}
} public void btn_reset_actionPerformed(ActionEvent e) {
this.txt_name.setText("");
this.txt_age.setText("");
this.txt_address.setText("");
this.txt_age.setEditable(true);
this.txt_address.setEditable(true);
}
} class JTableAppFrame_btn_del_actionAdapter implements ActionListener {
private JTableAppFrame adaptee;
JTableAppFrame_btn_del_actionAdapter(JTableAppFrame adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.btn_del_actionPerformed(e);
}
} class JTableAppFrame_btn_update_actionAdapter implements ActionListener {
private JTableAppFrame adaptee;
JTableAppFrame_btn_update_actionAdapter(JTableAppFrame adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.btn_update_actionPerformed(e);
}
} class JTableAppFrame_btn_reset_actionAdapter implements ActionListener {
private JTableAppFrame adaptee;
JTableAppFrame_btn_reset_actionAdapter(JTableAppFrame adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.btn_reset_actionPerformed(e);
}
} class JTableAppFrame_btn_add_actionAdapter implements ActionListener {
private JTableAppFrame adaptee;
JTableAppFrame_btn_add_actionAdapter(JTableAppFrame adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.btn_add_actionPerformed(e);
}
}
连接数据库类：DBCon.java
package jtabletest;
import java.sql.*;
import java.util.ArrayList;
import javax.swing.JOptionPane;
public class DBCon {
static Connection con;
private final String DRIVER = "sun.jdbc.odbc.JdbcOdbcDriver";
private final String URL = "jdbc:odbc:test";
ResultSet rs = null;
Statement st = null;
public DBCon() {
} public void connectDB() {
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException ex) {
System.out.println(ex.getMessage());
}
if (con == null) {
try {
con = DriverManager.getConnection(URL);
} catch (SQLException ex) {
System.out.println("创建连接发生异常:" + ex.getMessage());
System.exit();
}
}
} public ArrayList select() {
ArrayList list = new ArrayList();
String sql = "select * from Student";
try {
st = con.createStatement();
rs = st.executeQuery(sql);
while (rs.next()) {
Student stu = new Student();
stu.setName(rs.getString());
stu.setAge(rs.getInt());
stu.setAddress(rs.getString());
list.add(stu);
}
} catch (SQLException ex) {
System.out.println("查询数据发生异常:" + ex.getMessage());
} finally {
try {
rs.close();
} catch (SQLException ex1) {
System.out.println("查询数据关闭语句异常:" + ex1.getMessage());
}
}
return list;
} public void insert(String name, int age, String address) {
String sql = "insert into Student values(?,?,?)";
PreparedStatement ps = null;
try {
ps = con.prepareStatement(sql);
ps.setString(, name);
ps.setInt(, age);
ps.setString(, address);
if (ps.executeUpdate() != ) {
JOptionPane.showMessageDialog(null, "恭喜！插入数据成功！", "消息", );
}
} catch (SQLException ex) {
System.out.println("插入数据发生异常:" + ex.getMessage());
} finally {
try {
ps.close();
} catch (SQLException ex1) {
System.out.println("插入数据关闭语句异常:" + ex1.getMessage());
}
}
} public void update(String name, int age, String address) {
String sql = "update Student set age = ?,address = ? where name =?";
PreparedStatement ps = null;
try {
ps = con.prepareStatement(sql);
ps.setInt(, age);
ps.setString(, address);
ps.setString(, name);
if (ps.executeUpdate() != ) {
JOptionPane.showMessageDialog(null, "恭喜！更新数据成功！", "消息", );
}
} catch (SQLException ex) {
System.out.println("修改数据发生异常!");
} finally {
try {
ps.close();
} catch (SQLException ex1) {
System.out.println("修改数据关闭语句异常:" + ex1.getMessage());
}
}
} public void delete(String name) {
String sql = "delete from Student where name =?";
PreparedStatement ps = null;
int delNumber;
try {
ps = con.prepareStatement(sql);
ps.setString(, name);
delNumber = ps.executeUpdate();
if (delNumber != ) {
JOptionPane.showMessageDialog(null, "恭喜！删除数据成功！", "消息", );
}
} catch (SQLException ex) {
System.out.println("删除数据发生异常:" + ex.getMessage());
} finally {
try {
ps.close();
} catch (SQLException ex1) {
System.out.println("删除数据关闭语句异常:" + ex1.getMessage());
}
}
} public void destoryConnection() {
if (con != null) {
try {
con.close();
} catch (SQLException ex) {
System.out.println("释放连接异常：" + ex.getMessage());
}
}
}
}
JavaBean 类：Student.java
package jtabletest;
public class Student {
private String name;
private int age;
private String address;
public Student() {
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
public void setAddress(String address) {
this.address = address;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getAddress() {
return address;
}
}
