java sql Einsatz preparedstatment Fehler

Question

String sql = " INSERT INTO `tblservice` (`ServiceID`,`accountID`, `Kind`, `Description`, `Price`, " 
     + "`Quantity`, `Total`, `DateAndTime`) VALUES (NULL, ?, ?, ?, ?, ?, ?, ?)"; 
PreparedStatement pstm = conn.prepareStatement(sql); 
pstm.setInt(1, this.accountID); 
pstm.setString(2, "" + SelectionBox.getSelectedItem()); 
pstm.setString(3, desc); 
pstm.setFloat(4, Float.parseFloat(PriceTF.getText())); 
pstm.setFloat(5, Float.parseFloat(QuantityTF.getText())); 
pstm.setFloat(6, this.getTotal()); 
pstm.setDate(7, dateAdded); 

pstm.executeUpdate(); 

Fehler

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '?, ?, ?, ?, ?, ?, ?)' at line 1 

Answer 1

Statt make NULL in Ihrer Abfrage VALUES (NULL, ...) Verwendung setNull zum Beispiel:

pstm.setNull(1, java.sql.Types.INTEGER); 

es die Art nehmen, Ihr Feldes In diesem Beispiel betrachte ich es als java.sql.Types.INTEGER es kann java.sql.Types.VARCHAR oder irgendein sql type sein

So sollte Ihre Abfrage wie folgt sein:

String sql = "INSERT INTO tblservice (ServiceID, accountID, Kind, Description, 
       Price, Quantity, Total, DateAndTime) 
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)"; 

PreparedStatement pstm = conn.prepareStatement(sql); 
pstm.setNull(1, java.sql.Types.INTEGER); 
pstm.setInt(2, this.accountID); 
....