Question

我尝试两个同时使用外键插入两个表，但它没有插入，我不知道它为什么不工作。当我点击按钮时，它只会插入乘客桌，但行李箱未填充。我只是想得到外键的id号。这些是我的代码： -

乘客数据库表：

行李数据库表：

和我的代码： -

private void InsertLuggageInfo() {
        try {
            String query_passenger = "INSERT INTO passenger (Firstname,Lastname,Email,"
                    + "PhoneNr,Address,Zipcode,City,Country_name) "
                    + "VALUES (?,?,?,?,?,?,?,?)";

        stmt = conn.prepareStatement(query_passenger);

        stmt.setString(1, txtFirstname.getText());
        stmt.setString(2, txtLastname.getText());
        stmt.setString(3, txtEmail.getText());
        stmt.setString(4, txtPhoneNr.getText());
        stmt.setString(5, txtAddress.getText());
        stmt.setString(6, txtZipCode.getText());
        stmt.setString(7, txtCity.getText());
        stmt.setString(8, txtCountry.getText());

        stmt.execute();
        stmt.close();


    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }

    try {
        String query_luggage = "INSERT INTO passenger (DateFound,TimeFound,"
                + "LuggageType_id,Brand_id,MainColor_id,Status_id,Size_id,"
                + "Weight_id,SecondColor_id,LuggageTag,Image,Location_Airport_id,"
                + "Airport_id,Passenger_id) "
                + "VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

        stmt = conn.prepareStatement(query_luggage);

        stmt.setString(1, txtDatum.getText());
        stmt.setString(2, txtTimeFound.getText());
        stmt.setInt(3, get_LuggageType_id());
        stmt.setInt(4, get_Brand_id());
        stmt.setInt(5, get_MainColor_id());
        stmt.setInt(6, get_Status_id());
        stmt.setInt(7, get_Size_id());
        stmt.setInt(8, get_Weight_id());
        stmt.setInt(9, get_SecondColor_id());
        stmt.setString(10, txtLuggageTag.getText());
        stmt.setString(11, imgLuggage.toString());
        stmt.setInt(12, get_LocationAirport_id());
        stmt.setInt(13, get_Airport_id());
        stmt.setInt(14, get_Passenger_id());



        stmt.execute();
        stmt.close();


    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
}

我获取身份证的方法： -

 public int get_LuggageType_id() {
    int id = 0;
    try {

        String query = "Select LuggageType_id from luggagetype where LuggageType ='" + ddlLuggageType.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("LuggageType_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_Brand_id() {
    int id = 0;
    try {

        String query = "Select Brand_id from brand where Brand ='" + ddlMerk.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Brand_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_MainColor_id() {
    int id = 0;
    try {

        String query = "Select MainColor_id from maincolor where Color ='" + ddlMainColor.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("MainColor_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_Status_id() {
    int id = 0;
    try {

        String query = "Select Status_id from status where Status ='" + ddlStatus.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Status_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_Size_id() {
    int id = 0;
    try {

        String query = "Select Size_id from size where Size ='" + ddlMerk.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Size_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_Weight_id() {
    int id = 0;
    try {

        String query = "Select Weight_id from weight where Weight ='" + ddlWeight.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Weight");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}


public int get_Flight_id() {
    int id = 0;
    try {

        String query = "Select Flight_id from flight where Flight_number ='" + ddlWeight.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Flight_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_SecondColor_id() {
    int id = 0;
    try {

        String query = "Select SecondColor_id from secondcolor where Color ='" + ddlSecondColor.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("SecondColor_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_LocationAirport_id() {
    int id = 0;
    try {

        String query = "Select Location_Airport_id from location_airport where Location_name ='" + ddlLocationFound.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Location_Airport_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

public int get_Airport_id() {
    int id = 0;
    try {

        String query = "Select Airport_id from airport where Airport_name ='" + ddlLuchthaven.getSelectionModel().getSelectedItem().toString() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Airport_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}



public int get_Passenger_id() {
    int id = 0;
    try {

        String query = "Select Passenger_id from passenger where Firstname ='" + txtFirstname.getText() + "'";
        stmt = conn.prepareStatement(query);
        rs = stmt.executeQuery();
        while (rs.next()) {
            id = rs.getInt("Passenger_id");
        }
    } catch (SQLException ex) {
        Logger.getLogger(Verloren_bagageController.class.getName()).log(Level.SEVERE, null, ex);
    }
    return id;
}

Answer 1

首先，您应该更改获取生成ID的方式。您可以使用stmt.getGeneratedKeys（），如下所示：

stmt.executeUpdate()

这将保证您获得新插入的数据ID（您的乘客FK）。

另外，请尝试对两个插页使用select_if。

使用java同时将数据插入数据库中的两个表的正确方法

1 个答案: