获取JComboBox中的selectedItem并作为一个值插入查询新手

Question

我找不到将所有选定项目放在 3 个不同的组合框上的方法，我需要将其作为查询插入到 Java DB(derby)。这是我的代码。

int 响应 = JOptionPane.showConfirmDialog (null, "Do you want to add the employee?","Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);

    if(response == JOptionPane.YES_OPTION){

        try{
        String url="jdbc:derby://localhost:1527/EMPLOYEEINFO [ADMIN1 on ADMIN1]";
        String username="ADMIN1";
        String password="ADMIN1";

        Connection con = DriverManager.getConnection(url, username, password);
        Statement stat = con.createStatement();
        String Query = 
        "INSERT INTO EMPLOYEE (EMPLOYEE_ID,EMP_LASTNAME,EMP_FIRSTNAME,EMP_MIDDLENAME,ADDRESS,POSITION ) "
                +"VALUES "
                + "(' "+AddEmployee_EmployeeID_TxtField.getText()+" ',"
                + " ' "+AddEmployee_LastName_TxtField.getText()+" ',"
                + " ' "+AddEmployee_FirstName_TxtField.getText()+" ',"
                + " ' "+AddEmployee_MiddleName_TxtField.getText()+" ',"
                + " ' "+AddEmployee_Address_TxtField.getText()+" '"
                + " ' "+AddEmployee_Position_TxtField.getText()+" ',"
                + " ' "+AddEmployee_Gender_ComboBox.getSelectedItem()+"')"
                ;
        stat.execute(Query);
        JOptionPane.showMessageDialog(null,"Insert Success!");

下面是截图。我在考虑 getselectedObject 但我有 3 个组合框，所以我真的不知道怎么做。请帮忙。

我需要获取生日的月、日和年的选定项，然后将其插入我在 Derby 中的 table。提前致谢。

Answer 1

您应该创建一个单独的方法来获取字段并将值组合成格式化日期。像这样：

private String getDateFromFields() {
  String month = monthComboBox.getSelectedItem();
  String day = dayComboBox.getSelectedItem();
  String year = yearComboBox.getSelectedItem();
  // Format this the way your database expects.
  String formattedDate = month + "/" + day + "/" + year;
}

您只需调用此方法，您将返回可在查询中使用的格式化日期字符串。更改组合框字段的变量名称以匹配您的名称并将字符串格式化为您的数据库期望的格式，您应该一切顺利！

Answer 2

你可以这样做：

String bDay=dayCombo.getSelectedItem()+"-"+monthCombo.getSelectedItem()+"-"+yearCombo.getSelectedItem();

但我建议您在这种情况下使用 JDatechooser。

JDateChooser bDayChooser =new JDateChooser();
bDayChooser.setDateFormatString("dd-MM-yyyy");//format visible date of the date chooser as you need
String bDay=((JTextField) bDayChooser.getDateEditor().getUiComponent()).
                getText();

获取JComboBox中的selectedItem并作为一个值插入查询新手

Obtaining selectedItem in JComboBox and inserting as one value in query Newbie

java

mysql

jdbc

jcombobox