String databaseType = "mysql";
String host = "localhost";
int port = 3306;
String username = "user";
String password = "password";
DatabaseConfig config = new DatabaseConfig(databaseType, host, port, username, password);
DatabaseConnection connection = new DatabaseConnection(config);
String query = "SELECT * FROM table";
ResultSet result = connection.executeQuery(query);
while (result.next()) {
String column1 = result.getString("column1");
int column2 = result.getInt("column2");
}