Streaming großer Datenbank-Ergebnismengen mit dem RowCallbackHandler von Spring JdbcTemplate

@Service
public class ReportExportService {
    private final JdbcTemplate jdbcTemplate;
 
    public ReportExportService(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
 
    public void streamLargeDataset(OutputStream outputStream) {
        jdbcTemplate.setFetchSize(500);
        jdbcTemplate.query("SELECT id, payload FROM large_events", (RowCallbackHandler) rs -> {
            String record = rs.getLong("id") + "," + rs.getString("payload") + "\n";
            outputStream.write(record.getBytes(StandardCharsets.UTF_8));
        });
    }
}