我不知道该程序有什么问题，但每次点击保存的按钮都会说数据未保存。
这是有问题的代码：
private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {
String TicketNum = "FC-0";
int count= 1;
try {
host = "jdbc:derby://localhost:1527/Ticket Reservation";
username = "cmpe325";
pass = "final";
con = DriverManager.getConnection(host, username,pass);
stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql = "select * from CMPE325.TICKET_RESERVATION";
rs = stmt.executeQuery(sql);
while(rs.next())
{
String TicketCal = rs.getString("TICKET_NUM");
String FirstName = rs.getString("FIRST_NAME");
String MiddleName = rs.getString("MIDDLE_NAME");
String LastName = rs.getString("LAST_NAME");
String Address = rs.getString("ADDRESS");
String Residence = rs.getString("RESIDENCE_NUMBER");
String Offuce= rs.getString("OFFUCE_NUMBER");
String Mobile = rs.getString("MOBILE");
//NumPassenger = rs.getDouble("PASSENGER_NUM");
Double Adults = rs.getDouble("ADULTS_NUM");
Double Kids= rs.getDouble("KIDS_NUM");
String accomo= rs.getString("ACCOMODATION");
Double Stud = rs.getDouble("DISCOUNT_STUDENT");
Double Senfee = rs.getDouble("DISCOUNT_SENIORCITIZEN");
Double kid = rs.getDouble("KIDS_FEE");
Double normal = rs.getDouble("NORMAL_FEE");
Double pay = rs.getDouble("TOTAL_PAYMENT");
count ++;
}
}
catch(SQLException err)
{
JOptionPane.showMessageDialog(this,err.getMessage());
}
TicketNum += count;
String FirstName = txtBoxFirst.getText();
String MiddleName = txtBoxMiddle.getText();
String LastName = txtBoxLast.getText();
String Address = txtBoxAddress.getText();
String Residence = txtBoxResidence.getText();
String Offuce = txtBoxOffice.getText();
String Mobile = txtBoxMobile.getText();
Double Adults = Double.parseDouble(String.valueOf(txtBox2.getText()));
Double Student = Double.parseDouble(String.valueOf(txtBox4.getText()));
Double Kids = Double.parseDouble(String.valueOf(txtBox3.getText()));
Double SeniorCitizen = Double.parseDouble(String.valueOf(txtBox5.getText()));
String accomo = accomodation;
Double normal = NumAdults;
Double kid = NumKids;
Double Stud = disStudent;
Double Senfee = disSeniorCitizen;
Double pay = totalpay;
try
{
rs.moveToInsertRow();
rs.updateString("TICKET_NUM", TicketNum);
rs.updateString("FIRST_NAME",FirstName);
rs.updateString("MIDDLE_NAME",MiddleName);
rs.updateString("LAST_NAME",LastName);
rs.updateString("ADDRESS", Address);
rs.updateString("RESIDENCE_NUMBER",Residence);
rs.updateString("OFFUCE_NUMBER",Offuce);
rs.updateString("MOBILE", Mobile);
//rs.updateDouble("PASSENGER_NUMBER", NumPassenger);
rs.updateDouble("ADULTS_NUMBER", Adults);
rs.updateDouble("STUDENT_NUMBER", Student);
rs.updateDouble("SENIORCITIZEN_NUMBER", SeniorCitizen);
rs.updateDouble("KIDS_NUMBER", Kids);
rs.updateString("ACCOMODATION", accomo);
rs.updateDouble("DISCOUNT_STUDENT", Stud);
rs.updateDouble("DISCOUNT_SENIORCITIZEN",Senfee);
rs.updateDouble("KIDS_FEE", kid);
rs.updateDouble("NORMALFEE", normal);
rs.updateDouble("TOTAL_PAYMENT", pay);
rs.insertRow( );
stmt.close();
rs.close();
JOptionPane.showMessageDialog(this,"DATA SAVED Ticket Number is:"+ TicketNum);
}
catch(SQLException err)
{
JOptionPane.showMessageDialog(this,"DATA NOT SAVED PLEASE TRY AGAIN");
}
}
Stacktrace
error:
run:
java.sql.SQLIntegrityConstraintViolationException: Column 'PASSENGER_NUMBER' cannot accept a NULL value.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.ResultSet.insertRow(Unknown Source)
at FinalPro.java.Reserve.btnSaveActionPerformed(Reserve.java:1135)
at FinalPro.java.Reserve.access$900(Reserve.java:11)
at FinalPro.java.Reserve$10.actionPerformed(Reserve.java:605)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:155)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
at java.awt.Dialog.show(Dialog.java:1077)
at java.awt.Component.show(Component.java:1651)
at java.awt.Component.setVisible(Component.java:1603)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1003)
at FinalPro.java.FinalPro.MenuReserveActionPerformed(FinalPro.java:99)
at FinalPro.java.FinalPro.access$000(FinalPro.java:3)
at FinalPro.java.FinalPro$1.actionPerformed(FinalPro.java:34)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
Caused by: org.apache.derby.client.am.SqlException: Column 'PASSENGER_NUMBER' cannot accept a NULL value.
at org.apache.derby.client.am.Statement.completeExecute(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parseEXCSQLSTTreply(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.readExecute(Unknown Source)
at org.apache.derby.client.net.StatementReply.readExecute(Unknown Source)
at org.apache.derby.client.net.NetPreparedStatement.readExecute_(Unknown Source)
at org.apache.derby.client.am.ResultSet.readInsertRow(Unknown Source)
at org.apache.derby.client.am.ResultSet.insert(Unknown Source)
at org.apache.derby.client.am.ResultSet.insertRowX(Unknown Source)
... 87 more
BUILD SUCCESSFUL (total time: 24 seconds)
答案 0 :(得分：4)
查看错误SQLIntegrityConstraintViolationException: Column 'PASSENGER_NUMBER' cannot accept a NULL value
您正在传递一个空值，该值在数据库中不为空。
SOLUTION:您需要为该字段传递值。或者在数据库中删除非空约束。