You need to go to the vendor's web site such as Oracle and download the jar file for that particular database. Example: ojdbc14.jar for an oracle database and copy it to the 'lib' folder of your project and then include it with your project. Within that jar file, you will have datasource, preparedStatement, resultSet objects. You will need to read up on how to instansiate the datasource for that database from the vendor's documentation.