一些基础的关于java jdbc的程序代码
co.setArea(tfArea.getText());
co.setPopulation(tfPopu.getText());
co.setGdp(tfGDP.getText());
boolean flag = CountryOperate.add(co);
if (flag) {
JOptionPane.showMessageDialog(jFrame, "添加成功");
} else {
JOptionPane.showMessageDialog(jFrame, "添加失败");
}
}
} else if (e.getActionCommand().equals("删除")) {
if(!tfName.getText().equals("")){
String key = tfName.getText();
boolean flag = CountryOperate.del(key);
if (flag) {
JOptionPane.showMessageDialog(jFrame, "删除成功");
} else {
JOptionPane.showMessageDialog(jFrame, "删除失败");
}
}else {
JOptionPane.showMessageDialog(jFrame, "请填写一个国家名字");
}
} else if (e.getActionCommand().equals("更新")) {
if (!tfName.getText().equals("")
&& !cbRegion.getSelectedItem().equals("请选择")
&& !tfArea.getText().equals("")
&& !tfPopu.getText().equals("")
&& !tfGDP.getText().equals("")) {
Country cou = new Country();
cou.setName(tfName.getText());
cou.setRegion((String)cbRegion.getSelectedItem());
cou.setPopulation(tfPopu.getText());
cou.setArea(tfArea.getText());
cou.setGdp(tfGDP.getText());
boolean flag = CountryOperate.modify(cou);
if(flag){
JOptionPane.showMessageDialog(jFrame, "更新成功");
}else {
JOptionPane.showMessageDialog(jFrame, "更新失败");
}
} else {
JOptionPane.showMessageDialog(jFrame, "请填写相应的信息");
}
}