Making function to select

Question

Hi, i want to make a funtion using JSP and JAVA, making the connection to BD and SELECt from JAVA and show the array in JSP.
I can do it in put all them in a single line but i can�t put them in an array
ex. select cant, sku from units;
6 apple
3 banana
4 orange
and i want to see like that array but only can see 6,3,4,apple,banana,orange
the script is:
in java file
import java.io.*;
import java.sql.*;
import java.util.*;
public class BasedeDatos {
private Connection connection;
private Statement statement;
// Construyendo el objeto
public BasedeDatos() throws Exception {
// Cargando el Driver
Class.forName("net.sourceforge.jtds.jdbc.Driver");
// Conectado a la BD
connection = DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/thinks","aaaa","bbbb" );
statement = connection.createStatement();
public List Consulta( String campos, String tabla, String num_campos) throws SQLException {
List ListadeCampos = new ArrayList();
// Realiza el query
ResultSet results = statement.executeQuery( " SELECT "+ campos + " FROM "+ tabla +" ");
// Obteniendo los resultados en un arreglo
while ( results.next() ) {
     ListadeCampos.add (results.getString( 1 ));
     ListadeCampos.add (results.getString( 2 ));
return ListadeCampos;
// Cerrando el statements y terminado la conexion
protected void finalize() {
// Cerrando la conexion
try {
statement.close();
connection.close();
// Proceso de SQLException al cerrar la conexion
catch ( SQLException sqlException ) {
sqlException.printStackTrace();
and in the JSP file
<%@ page import = "java.util.*" %>
<%@ page import = "autentifica.*" %>
<jsp:useBean id = "BaseDatos" scope = "request" class = "autentifica.BasedeDatos" />
<%
String campos = "cant, sku";
String num_campos = "2";
String tabla = "units";
out.print(BaseDatos.Consulta(campos , tabla, num_campos));
%>

Answer 1

You should work with an iterator and avoid the out.println.
So, you would get something like this :
<jsp:useBean id="rondeLijst" class="java.util.ArrayList" scope="session"/>
<% int teller = 0;
for (Iterator i = rondeLijst.iterator(); i.hasNext(); )
if (teller == 11)
{ %>
<tr>
<th class="mopoTekst" scope="col">sel</th>
<th scope="col"><div align="right" class="mopoTekst"></div></th>
<th scope="col"><div align="right" class="mopoTekst"></div></th>
<th scope="col"><div align="left" class="mopoTekst">meterronde</div></th>
<th scope="col"><div align="right" class="mopoTekst">leidingen</div></th>
<th scope="col"><div align="right" class="mopoTekst">meters</div></th>
<th scope="col"><div align="right" class="mopoTekst">te lezen </div></th>
<th scope="col"><div align="right" class="mopoTekst">in CMB </div></th>
</tr>
<% teller = 0;
Meterronde meterronde = (Meterronde) i.next();
%>
<tr class="mopoTekst">
<td><input name="radioRonde" type="radio" value="<%=meterronde.getWijkRonde()%>"></td>
<td><div align="right"><%=meterronde.getWijknummer()%></div></td>
<td><div align="right"><%=meterronde.getRondenummer()%></div></td>
<td><div align="left"><%=meterronde.getOmschrijving()%></div></td>
<td ><div align="right"><%=meterronde.getAantalContractueleLeidingen()%></div></td>
<td ><div align="right"><%=meterronde.getAantalActieveMeters()%></div></td>
<td><div align="right"><%=meterronde.getAantalTeLezen()%></div></td>
</tr>
<% teller++;
} %>