右の方法は、データベース内の2つのテーブルに同時にJavaを使用してデータを挿入する

Question

私は2つのテーブルを外部キーと同時に挿入しようとしていますが、それは挿入されていないと私はなぜそれが動作していません。 ボタンをクリックすると乗客テーブルが挿入されるだけですが、荷物は塗りつぶされません。私はちょうど外部キーのID番号を取得したい。 これらは私のコードです： -

乗客のデータベーステーブル：

手荷物データベーステーブル：

と私のコード： -

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); 
    } 
} 

私のIDの取得方法： -

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

最初に、生成されたIDの取得方法を変更する必要があります。

long passengerId = 0; 
int affectedRows = stmt.executeUpdate(); 

if (affectedRows == 0) { 
    throw new SQLException("Insert Passenger error: no rows were affected."); 
} 

try (ResultSet generatedKeys = stmt.getGeneratedKeys()) { 
    if (generatedKeys.next()) { 
     passengerID = generatedKeys.getLong(1); 
    } 
    else { 
     throw new SQLException("Insert Passenger error: no ID obtained."); 
    } 
} 

これは、新しい挿入されたデータのID（あなたの乗客FK）を取得garanteeます：あなたは、次のようstmt.getGeneratedKeysを（）、使用することができます。

また、両方のインサートにstmt.executeUpdate()を使用してみます。