Java连接数据库增删改查(7)

一些基础的关于java jdbc的程序代码

lblRegion.setText("所属地区");

lblName = new JLabel();

lblName.setBounds(new Rectangle(15, 17, 63, 27));

lblName.setText("国家名称");

jContentPane = new JPanel();

jContentPane.setLayout(null);

jContentPane.add(lblName, null);

jContentPane.add(getTfName(), null);

jContentPane.add(lblRegion, null);

jContentPane.add(getCbRegion(), null);

jContentPane.add(lblArea, null);

jContentPane.add(getTfArea(), null);

jContentPane.add(lblPopu, null);

jContentPane.add(getTfPopu(), null);

jContentPane.add(lblGdp, null);

jContentPane.add(getTfGDP(), null);

jContentPane.add(getBtnAdd(), null);

jContentPane.add(getBtnDel(), null);

jContentPane.add(getBtnModify(), null);

jContentPane.add(getBtnQuery(), null);

jContentPane.add(getBtnUpPage(), null);

jContentPane.add(getBtnDownPage(), null);

}

return jContentPane;

}

public void actionPerformed(ActionEvent e) {

if (e.getActionCommand().equals("查找")) {

selectAll();

} else if (e.getActionCommand().equals("下一页")) {

selectDownPage();

} else if (e.getActionCommand().equals("上一页")) {

selectUpPage();

} else if (e.getActionCommand().equals("添加")) {

if (tfName.getText().equals("")

|| cbRegion.getSelectedItem().equals("请选择")

|| tfArea.getText().equals("")

|| tfPopu.getText().equals("")

|| tfGDP.getText().equals("")) {

JOptionPane.showMessageDialog(jFrame, "请填写相关信息");

}else {

Country co = new Country();

co.setName(tfName.getText());

co.setRegion((String) cbRegion.getSelectedItem());