📄 cewolfpie.jsp
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<!--
Fig. 8.4_01: CewolfPie.jsp
功能: Cewolf 编程实例: 饼图与3D饼图
-->
<%@ page contentType="text/html;charset=GB2312"%>
<%@ taglib uri='/WEB-INF/cewolf.tld' prefix='cewolf' %>
<%@ page import="java.util.*"%>
<%@ page import="de.laures.cewolf.*"%>
<%@ page import="de.laures.cewolf.tooltips.*"%>
<%@ page import="de.laures.cewolf.links.*"%>
<%@ page import="org.jfree.data.*"%>
<%@ page import="org.jfree.data.time.*"%>
<%@ page import="org.jfree.data.gantt.*"%>
<%@ page import="org.jfree.chart.*"%>
<%@ page import="org.jfree.chart.plot.*"%>
<%@ page import="org.jfree.chart.renderer.*"%>
<%@ page import="org.jfree.data.category.*"%>
<%@ page import="org.jfree.data.general.*"%>
<%@ page import="org.jfree.data.xy.*"%>
<%!
String chartTitle = "Cewolf 编程实例1: 垂直直方图";
String bookTitle[] = {"Python", "JAVA", "C#", "Perl", "PHP"};
String categories[] = {"第1周", "第2周", "第3周", "第4周" };
%>
<%
// 创建数据集
DatasetProducer pieData = new DatasetProducer()
{
public Object produceDataset(Map params)
{
DefaultPieDataset dataset = new DefaultPieDataset();
for (int i = 0; i < bookTitle.length; i++)
{
int y = 20+(int)(Math.random() * 50);
dataset.setValue(bookTitle[i], y);
}
return dataset;
}
public String getProducerId()
{
return "PieDataProducer";
}
public boolean hasExpired(Map params, Date since)
{
return false;
}
};
pageContext.setAttribute("pieData", pieData);
PieToolTipGenerator pieTG = new PieToolTipGenerator()
{
public String generateToolTip(PieDataset dataset, Comparable section, int index)
{
return "当前书籍销售量: " + dataset.getValue(section);
}
};
pageContext.setAttribute("pieToolTipGenerator", pieTG);
%>
<HTML>
<HEAD>
<TITLE><%=chartTitle%></TITLE>
</HEAD>
<BODY>
<cewolf:chart
id="pieChart"
title="Cewolf 编程实例11: 普通饼图"
type="pie">
<cewolf:data>
<cewolf:producer id="pieData" />
</cewolf:data>
</cewolf:chart>
<cewolf:img
chartid="pieChart"
renderer="/cewolf"
width="500"
height="375">
<cewolf:map tooltipgeneratorid="pieToolTipGenerator"/>
</cewolf:img>
<BR><BR>
<cewolf:chart
id="pie3d"
title="Cewolf 编程实例12: 3D饼图"
type="pie3D"
showlegend="false">
<cewolf:data>
<cewolf:producer id="pieData" />
</cewolf:data>
</cewolf:chart>
<cewolf:img
chartid="pie3d"
renderer="/cewolf"
width="500"
height="375">
<cewolf:map tooltipgeneratorid="pieToolTipGenerator"/>
</cewolf:img>
</BODY>
</HTML>
<!--
/**************************************************************************
* (C) Copyright 2004-2005 by Jingkui Zhong(钟京馗) and Huan Tang(唐桓). *
* All Rights Reserved. *
* *
* DISCLAIMER: The authors of this code have used their *
* best efforts in preparing the code. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these codes. The authors *
* shall not be liable in any event for incidental or consequential *
* damages in connection with, or arising out of, the furnishing, *
* performance, or use of these programs. *
**************************************************************************/
-->
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