Question

jfreechart实现点状图和折线图（特殊折线图）效果，求达人成全，图如下:

求指点，求高手！

Answer 1

简单例子：

public class JFreeChartAction extends Action {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

throws Exception {

// TODO Auto-generated method stub

JFreeChart jfreechart = createChart(createDataset());

OutputStream out = response.getOutputStream();

JfreeChartService.getChart(out,jfreechart,400, 300);

return mapping.findForward("fuck");

}

private static XYDataset createDataset()

    {

        XYSeries xyseries = new XYSeries("First");

        xyseries.add(1.0D, 1.0D);

        xyseries.add(2D, 4D);

        xyseries.add(3D, 3D);

        xyseries.add(4D, 5D);

        xyseries.add(5D, 5D);

        xyseries.add(6D, 7D);

        xyseries.add(7D, 7D);

        xyseries.add(8D, 8D);

        XYSeries xyseries1 = new XYSeries("Second");

        xyseries1.add(1.0D, 5D);

        xyseries1.add(2D, 7D);

        xyseries1.add(3D, 6D);

        xyseries1.add(4D, 8D);

        xyseries1.add(5D, 4D);

        xyseries1.add(6D, 4D);

        xyseries1.add(7D, 2D);

        xyseries1.add(8D, 1.0D);

        XYSeriesCollection xyseriescollection = new XYSeriesCollection();

        xyseriescollection.addSeries(xyseries);

        xyseriescollection.addSeries(xyseries1);

        return xyseriescollection;

    }

    private static JFreeChart createChart(XYDataset xydataset)

    {

        JFreeChart jfreechart = ChartFactory.createXYLineChart("Line Chart Demo", "X", "Y", xydataset, PlotOrientation.VERTICAL, true, true, false);

        XYPlot xyplot = (XYPlot)jfreechart.getPlot();

        XYLineAndShapeRenderer xylineandshaperenderer = new XYLineAndShapeRenderer();

        xylineandshaperenderer.setSeriesLinesVisible(0, false);

        xylineandshaperenderer.setSeriesShapesVisible(1, false);

        xylineandshaperenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());

        xyplot.setRenderer(xylineandshaperenderer);

        NumberAxis numberaxis = (NumberAxis)xyplot.getRangeAxis();

        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

        return jfreechart;

    }

}

****************************************************************************************************

追问

基本思路对了，但是，大大，能做到这种线图和点图混合吗？

追答

你的图里哪有点啊，不就是水平网格线吗？
**************************************** 代 码 ***********************************************
public class JFreeChartAction extends Action {

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
// TODO Auto-generated method stub
JFreeChart jfreechart = createChart(createDataset());
OutputStream out = response.getOutputStream();
JfreeChartService.getChart(out,jfreechart,400, 300);
return mapping.findForward("fuck");
}
private static XYDataset createDataset()
{
XYSeries xyseries = new XYSeries("Series");
xyseries.add(1.0D, 3D);
xyseries.add(2D, 4D);
xyseries.add(3D, 2D);
xyseries.add(6D, 3D);
XYSeriesCollection xyseriescollection = new XYSeriesCollection();
xyseriescollection.addSeries(xyseries);
return xyseriescollection;
}

private static JFreeChart createChart(XYDataset xydataset)
{
JFreeChart jfreechart = ChartFactory.createXYLineChart("JFreeChart Demo", "X", "Y", xydataset, PlotOrientation.VERTICAL, true, true, false);

XYPlot xyplot = (XYPlot)jfreechart.getPlot();
xyplot.setBackgroundPaint(Color.white);
xyplot.setDomainGridlinesVisible(false);
xyplot.setRangeGridlinePaint(Color.gray);
xyplot.setRangeGridlinesVisible(true);
XYStepRenderer xysteprenderer = new XYStepRenderer();
xysteprenderer.setSeriesStroke(0, new BasicStroke(2.0F));
xysteprenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
xysteprenderer.setDefaultEntityRadius(6);
xyplot.setRenderer(xysteprenderer);
return jfreechart;
}
}
************************************** 效 果 ********************************************************