jfreechart 报表作图

JFreeChart做时间曲线图   

2008-12-16 10:28:06 |  分类： JSP/JAVA技术 | 字号   订阅

<%@ page contentType="text/html;charset=GBK"%>
<%@ page import = "org.jfree.chart.ChartFactory,
                  org.jfree.chart.ChartPanel,
                  org.jfree.chart.JFreeChart,
  org.jfree.chart.servlet.ServletUtilities,
  org.jfree.chart.*,
  org.jfree.chart.StandardLegend,
  org.jfree.chart.axis.DateAxis,
  org.jfree.chart.plot.XYPlot,
  org.jfree.chart.renderer.StandardXYItemRenderer,
  org.jfree.chart.renderer.XYItemRenderer,
  org.jfree.data.XYDataset,
  org.jfree.data.time.Month,
  org.jfree.data.time.TimeSeries,
  org.jfree.data.time.TimeSeriesCollection
"%>
<%

       TimeSeries s1 = new TimeSeries("L&G European Index Trust", Month.class);
       s1.add(new Month(2, 2001), 181.8);
       s1.add(new Month(3, 2001), 167.3);
       s1.add(new Month(4, 2001), 153.8);
       s1.add(new Month(5, 2001), 167.6);
       s1.add(new Month(6, 2001), 158.8);
       s1.add(new Month(7, 2001), 148.3);
       s1.add(new Month(8, 2001), 153.9);
       s1.add(new Month(9, 2001), 142.7);
       s1.add(new Month(10, 2001), 123.2);
       s1.add(new Month(11, 2001), 131.8);
       s1.add(new Month(12, 2001), 139.6);
       s1.add(new Month(1, 2002), 142.9);
       s1.add(new Month(2, 2002), 138.7);
       s1.add(new Month(3, 2002), 137.3);
       s1.add(new Month(4, 2002), 143.9);
       s1.add(new Month(5, 2002), 139.8);
       s1.add(new Month(6, 2002), 137.0);
       s1.add(new Month(7, 2002), 132.8);

       TimeSeries s2 = new TimeSeries("L&G UK Index Trust", Month.class);
       s2.add(new Month(2, 2001), 129.6);
       s2.add(new Month(3, 2001), 123.2);
       s2.add(new Month(4, 2001), 117.2);
       s2.add(new Month(5, 2001), 124.1);
       s2.add(new Month(6, 2001), 122.6);
       s2.add(new Month(7, 2001), 119.2);
       s2.add(new Month(8, 2001), 116.5);
       s2.add(new Month(9, 2001), 112.7);
       s2.add(new Month(10, 2001), 101.5);
       s2.add(new Month(11, 2001), 106.1);
       s2.add(new Month(12, 2001), 110.3);
       s2.add(new Month(1, 2002), 111.7);
       s2.add(new Month(2, 2002), 111.0);
       s2.add(new Month(3, 2002), 109.6);
       s2.add(new Month(4, 2002), 113.2);
       s2.add(new Month(5, 2002), 111.6);
       s2.add(new Month(6, 2002), 108.8);
       s2.add(new Month(7, 2002), 101.6);

       TimeSeriesCollection dataset = new TimeSeriesCollection();
       dataset.addSeries(s1);
       dataset.addSeries(s2);

       dataset.setDomainIsPointsInTime(true);
JFreeChart chart = ChartFactory.createTimeSeriesChart(
           "Legal & General Unit Trust Prices",
           "Date", "Price Per Unit",
           dataset,
           true,
           true,
           false
       );

       //chart.setBackgroundPaint(Color.white);

       StandardLegend sl = (StandardLegend) chart.getLegend();
       sl.setDisplaySeriesShapes(true);

       XYPlot plot = chart.getXYPlot();
      // plot.setBackgroundPaint(Color.lightGray);
       //plot.setDomainGridlinePaint(Color.white);
       //plot.setRangeGridlinePaint(Color.white);
      //plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
       plot.setDomainCrosshairVisible(true);
       plot.setRangeCrosshairVisible(true);
       
       XYItemRenderer renderer = plot.getRenderer();
       if (renderer instanceof StandardXYItemRenderer) {
           StandardXYItemRenderer rr = (StandardXYItemRenderer) renderer;
           rr.setPlotShapes(true);
           rr.setShapesFilled(true);
       }
       
       DateAxis axis = (DateAxis) plot.getDomainAxis();
       //axis.setDateFormatOverride(new SimpleDateFormat("MM-yyyy"));

 
String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
%>
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>">