饼状图

最新推荐文章于 2025-07-21 16:29:07 发布

原创最新推荐文章于 2025-07-21 16:29:07 发布 · 551 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#jfreechart #import #plot #string #border #session

开源技术专栏收录该内容

38 篇文章

订阅专栏

<%@ page contentType="text/html;charset=UTF-8"%>
<%@ page import="org.jfree.data.general.DefaultPieDataset"%>
<%@ page import="org.jfree.chart.*"%>
<%@ page import="org.jfree.chart.plot.*"%>
<%@ page import="org.jfree.chart.servlet.ServletUtilities"%>
<%@ page import="org.jfree.chart.labels.StandardPieToolTipGenerator"%>
<%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%>
<%@ page import="org.jfree.chart.entity.StandardEntityCollection"%>
<%@ page import="java.io.*"%>
<HTML>
<HEAD>
<META http-equiv=Content-Type content="text/html; charset=GBK">
<TITLE>nacl_zhuang@hotmail.com</TITLE>
</HEAD>
<BODY>
<%

DefaultPieDataset data = new DefaultPieDataset();
data.setValue("高中以下",370);
data.setValue("高中",1530);
data.setValue("大专",5700);
data.setValue("本科",8280);
data.setValue("硕士",4420);
data.setValue("博士",80);

PiePlot3D plot = new PiePlot3D(data);//3D饼图
plot.setURLGenerator(new StandardPieURLGenerator("barview.jsp"));//设定链接
JFreeChart chart = new JFreeChart("",JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.setBackgroundPaint(java.awt.Color.white);//可选，设置图片背景色
chart.setTitle("程序员学历情况调查表");//可选，设置图片标题
plot.setToolTipGenerator(new StandardPieToolTipGenerator());
StandardEntityCollection sec = new StandardEntityCollection();
ChartRenderingInfo info = new ChartRenderingInfo(sec);
PrintWriter w = new PrintWriter(out);//输出MAP信息
//500是图片长度，300是图片高度
String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);
ChartUtilities.writeImageMap(w, "map0", info, false);

String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;

%>

<P ALIGN="CENTER">
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#map0">
</P>
</BODY>
</HTML>