how create dynamic html reports?

<?page title="new page title" contentType="text/html;charset=UTF-8"?>

<zk xmlns="http://www.zkoss.org/2005/zul">
<window title="new page title" border="normal" apply="${testeController}">
   <iframe id="PDFreport" width="100%" height="100%"/>
</window>
</zk>

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package teste;

import ar.com.fdvs.dj.core.DJServletHelper;
import ar.com.fdvs.dj.domain.DynamicReport;
import ar.com.fdvs.dj.domain.builders.FastReportBuilder;
import ar.com.fdvs.dj.core.DynamicJasperHelper;
import ar.com.fdvs.dj.core.layout.ClassicLayoutManager;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.zkoss.util.media.AMedia;
import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.Iframe;

/**
 *
 * @author manuel
 */
public class TesteController extends GenericForwardComposer {

    Iframe PDFreport;

    @Override
    public void doAfterCompose(Component comp) throws Exception {
        super.doAfterCompose(comp);
        doReport();
    }

    public void doReport() {
        try {
            FastReportBuilder drb = new FastReportBuilder();
            DynamicReport dr;
            InputStream mediais;
            AMedia amedia;
            drb.addColumn("FirstName", "firstName", String.class.getName(), 30);
            drb.addColumn("LastName", "lastName", String.class.getName(), 30);
            drb.addColumn("MiddleName", "middleName", String.class.getName(), 30);
            drb.addColumn("SocialNumber", "socialNumber", String.class.getName(), 30);
            drb.setTitle("Test of Dynamic Columns Jasper Report");
            drb.setPrintBackgroundOnOddRows(true);
            drb.setUseFullPageWidth(true);
            dr = drb.build();
            List data = new ArrayList();
            Map map1 = new HashMap();
            map1.put("firstName", "Shainaz");
            map1.put("lastName", "Tamboli");
            map1.put("middleName", "Tajudin");
            map1.put("socialNumber", "9700000000");
            data.add(map1);
            System.out.println("Data:" + data);
            JRDataSource ds = new JRBeanCollectionDataSource(data);
            System.out.println("Ds:" + ds);
            JasperReport report = DynamicJasperHelper.generateJasperReport(dr, new ClassicLayoutManager(), new HashMap());
            
            byte[] buf = JasperRunManager.runReportToPdf(report, new HashMap(), ds);
//prepare the AMedia for iframe

            mediais = (InputStream) new ByteArrayInputStream(buf);
            amedia = new AMedia("AlarmHistoryReport.pdf", "pdf", "application/pdf", mediais);

//set iframe content
            PDFreport.setContent(amedia);
        } catch (Exception e) {
        }
    }
}