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发表时间：2009-11-07
最后修改：2009-11-07
简单的ChartDirector图表生成例子
<%@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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