运行时没有错误，但我的 event_ID 是 1,2,3,4,5,6 但控制台显示
更新 crossEvent SET event_Seat = '10' WHERE event_ID =0
由于 event_ID 不同，我的 event_Seat 为 20 并没有更新为 10
public TicketBooking(int eventID){
this.eventID = eventID;
}
/**
* This method initializes jButtonSubmit
*
* @return javax.swing.JButton
*/
private JButton getJButtonSubmit() {
if (jButtonSubmit == null) {
jButtonSubmit = new JButton();
jButtonSubmit.setBounds(new Rectangle(517, 317, 79, 22));
jButtonSubmit.setText("Submit");
jButtonSubmit
.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
{
submitRegisteration(e);
}
}
});
}
return jButtonSubmit;
}
public void submitRegisteration(ActionEvent e) {
String firstName = getJTextFieldFirstName().getText();
String lastName = getJTextFieldLastName().getText();
String Contact = getJTextFieldContact().getText();
String Nric = getJTextFieldNRIC().getText();
String event = jTextArea1.getText().toString();
if (firstName.equals("") || lastName.equals("")) {
JOptionPane.showMessageDialog(null, "Please enter all text field");
}
else {
bookingEventUser user = new bookingEventUser(firstName, lastName, Contact, Nric, event , eventID);
if (user.createUser() == true)
TicketAvailability();
JOptionPane.showMessageDialog(null,
"User record created successfully!");
}
}
public void TicketAvailability(){
String newseats = jComboBox1.getSelectedItem().toString();
int seats = Integer.parseInt(newseats);
DBController db = new DBController();
db.setUp("IT Innovation Project: Database");
ResultSet rs = null;
String dbQuery = "SELECT event_Seat FROM crossEvent WHERE event_ID = "+eventID+" ";
rs = db.readRequest(dbQuery);
int seatAvailable=0;
try{
while(rs.next()){
seatAvailable = Integer.parseInt(rs.getString("event_Seat"));//rs.getString is retrieving data from database and making it to String
}
rs.close();
}catch(Exception e1){
}
int resultSeat = seatAvailable - seats ;
Event update = new Event(resultSeat);
update.updateSeat();
}
/**
* This method initializes jTextArea
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextArea() {
if (jTextArea == null) {
jTextArea = new JTextArea();
jTextArea.setBounds(new Rectangle(67, 289, 84, 16));
jTextArea.setText(Integer.toString(eventID));
jTextArea.setVisible(false);
}
return jTextArea;
}
/**
* This method initializes jTextArea1
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextArea1() {
if (jTextArea1 == null) {
jTextArea1 = new JTextArea();
jTextArea1.setBounds(new Rectangle(195, 205, 127, 26));
jTextArea1.setEditable(false);
}
return jTextArea1;
}
public void SetEventTitle(){
db.setUp("IT Innovation Project: Database");
String sql = "Select event_Title from crossEvent WHERE event_ID ="+ eventID +"";
ResultSet rs = null;
rs = db.readRequest(sql);
try{
while(rs.next()){
jTextArea1.setText(rs.getString("event_Title"));
}
rs.close();
}catch(Exception e){
System.out.println(e);
}
}
public static void main(String args[]) {
TicketBooking myWindow = new TicketBooking(eventID);
myWindow.getJFrame().setVisible(true);
}
}
public class Event {
private int resultSeat;
private int eventID;
public Event(int resultSeat) {
this.resultSeat = resultSeat;
}
public boolean updateSeat(){
boolean success = false;
DBController db = new DBController();
db.setUp("IT Innovation Project: Database");
String sql = "UPDATE crossEvent SET event_Seat = '" + resultSeat + "' WHERE event_ID ="+ eventID+ "";
System.out.println(sql);
if (db.updateRequest(sql) == 1)
success = true;
db.terminate();
return success;
}
}