[导入]饼状图

[导入]饼状图

带热点提示的饼状图(即鼠标放在图型上可以看到当前数据项)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<%@

 

 

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=UTF-8"

>

 

 

< title ></ 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

>

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文章来源: http://java-jun.javaeye.com/blog/602623