area3.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.servlet.ServletUtilities,
                 org.jfree.chart.labels.StandardXYToolTipGenerator,
                 org.jfree.chart.plot.PlotOrientation,
                 org.jfree.chart.plot.XYPlot,
                 org.jfree.chart.renderer.xy.StackedXYAreaRenderer2,
                 org.jfree.data.xy.CategoryTableXYDataset"%>
                 
<%
CategoryTableXYDataset categorytablexydataset = new CategoryTableXYDataset();
categorytablexydataset.add(0.0D, 0.0D, "序列1");
categorytablexydataset.add(10D, 20D, "序列1");
categorytablexydataset.add(20D, 15D, "序列1");
categorytablexydataset.add(30D, 25D, "序列1");
categorytablexydataset.add(40D, 21D, "序列1");
categorytablexydataset.add(10D, 9D, "序列2");
categorytablexydataset.add(20D, -7D, "序列2");
categorytablexydataset.add(30D, 15D, "序列2");
categorytablexydataset.add(40D, 11D, "序列2");
categorytablexydataset.add(45D, -10D, "序列2");
categorytablexydataset.add(50D, 0.0D, "序列2");

//创建堆栈XY的JFreeChart实例
JFreeChart jfreechart = ChartFactory.createStackedXYAreaChart("堆栈XY区域图实例",
					"X值",
					"Y值",
					categorytablexydataset,
					PlotOrientation.VERTICAL,
					true,
					true,
					false);
XYPlot xyplot = (XYPlot) jfreechart.getPlot();
StackedXYAreaRenderer2 stackedxyarearenderer2 = new StackedXYAreaRenderer2();
stackedxyarearenderer2.setRoundXCoordinates(true);
stackedxyarearenderer2.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
xyplot.setRenderer(0, stackedxyarearenderer2);

String filename = ServletUtilities.saveChartAsPNG(jfreechart, 600, 400, null, session);
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
%>
<img src="<%= graphURL %>" width="600" height="400" border="0" usemap="#<%= filename %>">