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ChartDirector生成圖表的例子分享

原創(chuàng)|其它|編輯：郝浩|2012-10-16 13:41:20.000|閱讀 330 次

概述：最近在學(xué)習(xí)ChartDirector，寫了一個(gè)例子

最近在學(xué)習(xí)ChartDirector，寫了一個(gè)例子，是關(guān)于ChartDirector圖表生成例子。

以下是這個(gè)例子的兩段代碼，大家分享分享：

<%@page import="ChartDirector.*" %>
<%
// The data for the bar chart
double[] data = {85, 156, 179.5, 211, 123};

// The labels for the bar chart
String[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

// Create a XYChart object of size 250 x 250 pixels
XYChart c = new XYChart(250, 250);

// Set the plotarea at (30, 20) and of size 200 x 200 pixels
c.setPlotArea(30, 20, 200, 200);

// Add a bar chart layer using the given data
c.addBarLayer(data);

// Set the labels on the x axis.
c.xAxis().setLabels(labels);

// Output the chart
String chart1URL = c.makeSession(request, "chart1");

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='{xLabel}: US${value}K'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Simple Bar Chart
</div>
<hr color="#000080">
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1URL)%>'
    usemap="#map1" border="0">
<map name="map1"><%=imageMap1%></map>
</body>
</html>

getchart.jsp

<%@page import="ChartDirector.*" %><%
try 
{   
    
	out.clear();
	GetSessionImage.getImage(request, response);
	response.setHeader("Content-Type","image/png");
	if (Math.max(1, 2) == 2) return;
}
catch (IllegalStateException e) 
{ 
	response.sendRedirect(response.encodeRedirectURL(
		"getchart.chart?" + request.getQueryString()));
	return;
}
%>

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文章轉(zhuǎn)載自：iteye博客

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