sample.jsp

jfreechart 柱状图 均值图 和值图 实例

<%@ 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,
org.jfree.data.category.DefaultCategoryDataset%>
<%
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(610, 广州, 猪肉);
dataset.addValue(220, 广州, 牛肉);
dataset.addValue(530, 广州, 鸡肉);
dataset.addValue(340, 广州, 鱼肉);
JFreeChart chart = ChartFactory.createBarChart3D(肉类销量统计图,
肉类,
销量,
dataset,
PlotOrientation.VERTICAL,
false,
false,
false);
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 %>>