还是雷达图

Question

public class MySpriderWebPlotTest { public static void main(String args[]) {        JFrame jf = new JFrame();        jf.add(erstelleSpinnenDiagramm());        jf.pack();        jf.setVisible(true);    }    public static JPanel erstelleSpinnenDiagramm() {        DefaultCategoryDataset dataset = new DefaultCategoryDataset();        String group1 = "apple ";                dataset.addValue(5, group1, "w1");        dataset.addValue(5, group1, "w2");        dataset.addValue(5, group1, "w3");        dataset.addValue(4, group1, "w4");        dataset.addValue(5, group1, "w5");        dataset.addValue(5, group1, "w6");        dataset.addValue(5, group1, "w7");        dataset.addValue(5, group1, "w8");            SpiderWebPlot spiderwebplot = new SpiderWebPlot(dataset);                JFreeChart jfreechart = new JFreeChart("Test", TextTitle.DEFAULT_FONT,spiderwebplot, false);        LegendTitle legendtitle = new LegendTitle(spiderwebplot);        legendtitle.setPosition(RectangleEdge.BOTTOM);        jfreechart.addSubtitle(legendtitle);                ChartPanel chartpanel = new ChartPanel(jfreechart);        return chartpanel;    }}用这种方法生成的图片不能展示在JSP页面上，求高手指点怎样能使雷达图展示在JSP页面上