📄 cewolfoverlay.jsp
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<!--
Fig. 8.4_09: CewolfOverLay.jsp
功能: Cewolf 实例23: OverLay类型的图表
-->
<%@ 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 实例23: OverLay类型的图表";
TimeSeries ts = new TimeSeries("");
%>
<%
final DatasetProducer barData = new DatasetProducer()
{
public Object produceDataset(Map params)
{
TimeSeries tsc = new TimeSeries("2005年1月国际原油价格");
double value = 35;
Day day = new Day(1, 1, 2005);
for (int i = 0; i < 30; i++)
{
// 生成原油价格
value += Math.random() * 5-2.5;
tsc.add(day, value);
day = (Day)day.next();
}
TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.addSeries(tsc);
ts = tsc;
return dataset;
}
public boolean hasExpired(Map params, Date since)
{
return true;
}
public String getProducerId()
{
return "2005年1月国际原油价格";
}
};
pageContext.setAttribute("barData", barData);
DatasetProducer movingLineData = new DatasetProducer()
{
public Object produceDataset(Map params)
{
//创建移动平均线
TimeSeries mav = MovingAverage.createMovingAverage(
ts, "5天油价移动平均价", 5, 5);
TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.addSeries(mav);
return dataset;
}
public boolean hasExpired(Map params, Date since)
{
return true;
}
public String getProducerId()
{
return "5天油价移动平均价";
}
};
pageContext.setAttribute("movingLineData", movingLineData);
%>
<html>
<head><title><%=chartTitle%></title></head>
<BODY >
<cewolf:overlaidchart
id="OverLayChart"
title="<%=chartTitle%>"
type="overlaidxy"
xaxistype="date"
yaxistype="number"
xaxislabel="日期"
yaxislabel="原油价格">
<cewolf:colorpaint color="#FFFFCC"/>
<cewolf:plot type="xyverticalbar">
<cewolf:data>
<cewolf:producer id="barData" />
</cewolf:data>
</cewolf:plot>
<cewolf:plot type="xyline">
<cewolf:data>
<cewolf:producer id="movingLineData" />
</cewolf:data>
</cewolf:plot>
</cewolf:overlaidchart>
<cewolf:img
chartid="OverLayChart"
renderer="/cewolf"
width="500"
height="375">
</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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