Mapping a row from a SQL data to a Java object

Question

I have a Java class with instance fields (and matching setter methods) that match the column names of a SQL database table. I would like to elegantly fetch a row from the table

Answer 1

If you do not want to use any other framework, you can create standard mapping method and use it after every Result.

public class CurrencyDAO(){

        public Currency findById(int id) {
        String sql = "SELECT * FROM CCR.CURRENCY WHERE id = ?";
        Currency currency = null;
        Connection c = null;
        try {
            c = DBConnection.getConnection();
            PreparedStatement ps = c.prepareStatement(sql);
            ps.setInt(1, id);
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                currency = processRow(rs);
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        } finally {
            DBConnection.close(c);
        }
        return currency;
    }


    protected Currency processRow(ResultSet rs) throws SQLException {
        Currency currency = new Currency();
        currency.setId(rs.getInt("id"));
        currency.setEUR(rs.getString("EUR"));
        currency.setUSD(rs.getString("USD"));
        currency.setRate(rs.getString("rate"));     
        return currency;

    }
}