bar1.jsp

来自「JFreeChart开发全攻略,JFreeChart开发全攻略」· JSP 代码 · 共 26 行

<%@ 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(110, "长沙", "白菜");
dataset.addValue(220, "长沙", "生菜");
dataset.addValue(330, "长沙", "西洋菜");
dataset.addValue(440, "长沙", "豆芽菜");

JFreeChart chart = ChartFactory.createBarChart3D("蔬菜销量统计图", 
                  "蔬菜",
                  "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 %>">