bar6.jsp

JFreeChart开发全攻略,JFreeChart开发全攻略

<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.ChartFactory,
                 org.jfree.chart.JFreeChart,
                 org.jfree.chart.plot.PlotOrientation,
                 org.jfree.chart.servlet.ServletUtilities,
                 java.awt.*,
                 org.jfree.chart.plot.CategoryPlot,
                 org.jfree.data.category.DefaultCategoryDataset,
                 org.jfree.chart.axis.*,
                 org.jfree.chart.renderer.category.BarRenderer,
                 bar.Animator"%>
<%
String s = "First";
String s1 = "Second";
String s2 = "Third";
String s3 = "Category 1";
String s4 = "Category 2";
String s5 = "Category 3";
String s6 = "Category 4";
String s7 = "Category 5";
DefaultCategoryDataset categorydataset = new DefaultCategoryDataset();
categorydataset.addValue(31D, s, s3);
categorydataset.addValue(44D, s, s4);
categorydataset.addValue(33D, s, s5);
categorydataset.addValue(45D, s, s6);
categorydataset.addValue(35D, s, s7);
categorydataset.addValue(45D, s1, s3);
categorydataset.addValue(37D, s1, s4);
categorydataset.addValue(46D, s1, s5);
categorydataset.addValue(38D, s1, s6);
categorydataset.addValue(44D, s1, s7);
categorydataset.addValue(34D, s2, s3);
categorydataset.addValue(43D, s2, s4);
categorydataset.addValue(32D, s2, s5);
categorydataset.addValue(43D, s2, s6);
categorydataset.addValue(36D, s2, s7);

JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo", "Category", "Value", categorydataset, PlotOrientation.VERTICAL, true, true, false);
jfreechart.setBackgroundPaint(Color.white);
CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
categoryplot.setBackgroundPaint(Color.lightGray);
categoryplot.setDomainGridlinePaint(Color.white);
categoryplot.setDomainGridlinesVisible(true);
categoryplot.setRangeGridlinePaint(Color.white);

NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

BarRenderer barrenderer = (BarRenderer)categoryplot.getRenderer();
barrenderer.setDrawBarOutline(false);
GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue, 0.0F, 0.0F, new Color(0, 0, 64));
GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green, 0.0F, 0.0F, new Color(0, 64, 0));
GradientPaint gradientpaint2 = new GradientPaint(0.0F, 0.0F, Color.red, 0.0F, 0.0F, new Color(64, 0, 0));
barrenderer.setSeriesPaint(0, gradientpaint);
barrenderer.setSeriesPaint(1, gradientpaint1);
barrenderer.setSeriesPaint(2, gradientpaint2);
CategoryAxis categoryaxis = categoryplot.getDomainAxis();
categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(0.52359877559829882D));

Animator animator = new Animator(categorydataset);
animator.start();

String filename = "";
String graphURL = "";
for (int i =0; i < 5; i++) {
	filename = ServletUtilities.saveChartAsPNG(jfreechart, 700, 400, null, session);
	graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
%>
<img src="<%= graphURL %>" width="700" height="400" border="0" usemap="#<%= filename %>">

<%
}
%>