Graficos com Cewolf, JSP e BD?

<%@taglib uri='/WEB-INF/cewolf.tld' prefix='cewolf' %>
<%@page import="java.util.*"%>
<%@page import="de.laures.cewolf.*"%>
<%@page import="org.jfree.data.*"%>
<%@page import="org.jfree.chart.*"%>
<%@page import="java.awt.Insets" %>

<%
    DatasetProducer categoryData = new DatasetProducer() {
        public Object produceDataset(Map params) {
            final String[] categories = { "Média Semanal", "de 00/00 a 00/00"};
            final String[] seriesNames = { "Outros", "Brasil Realty", "Cyrela", "Rofer","Rossi","Camargo Correa" };
            final Integer[][] startValues = new Integer[seriesNames.length][categories.length];
            final Integer[][] endValues = new Integer[seriesNames.length][categories.length];
            for (int series = 0; series < seriesNames.length; series++) {
                for (int i = 0; i < categories.length; i++) {
                    int y = (int) (Math.random() * 10 + 1);
                    startValues[series][i] = new Integer(y);
                    endValues[series][i] = new Integer(y + (int) (Math.random() * 10));
                }
            }
            DefaultIntervalCategoryDataset ds =
                new DefaultIntervalCategoryDataset(seriesNames, categories, startValues, endValues);
            return ds;
        }
        public String getProducerId() {
            return "CategoryDataProducer";
        }
        public boolean hasExpired(Map params, Date since) {
            return false;
        }
    };
    pageContext.setAttribute("categoryData", categoryData);
%>

<cewolf:chart id="stackedVerticalBar3D" title="Midia Monitor" legendanchor="north" antialias="true" type="stackedVerticalBar3D" xaxislabel="" yaxislabel="">
    <cewolf:colorpaint color="#FFFFFF"/>
    <cewolf:data>
        <cewolf:producer id="categoryData" />
    </cewolf:data>
</cewolf:chart>
<cewolf:img chartid="stackedVerticalBar3D" renderer="/cewolf" width="400" height="300"/>