JfreeChart报表数据点显示、链接
链接
Java代码：
import
java.io.IOException;
import
java.io.PrintWriter;
import
javax.servlet.http.HttpSession;
import
org.jfree.chart.ChartRenderingInfo;
import
org.jfree.chart.ChartUtilities;
import
org.jfree.chart.JFreeChart;
import
org.jfree.chart.entity.StandardEntityCollection;
import
org.jfree.chart.labels.StandardPieToolTipGenerator;
import
org.jfree.chart.plot.PiePlot;
import
org.jfree.chart.plot.PiePlot3D;
import
org.jfree.chart.servlet.ServletUtilities;
import
org.jfree.chart.urls.StandardPieURLGenerator;
import
org.jfree.data.general.Dataset;
import
org.jfree.data.general.DefaultPieDataset;
/**
* JfreeChart饼状图
* 数据点使用超链
*
@author
archie2010
* since 2011-4-2上午11:05:50
*/
public
class
MapPieChart {
/**
* 生成Dataset数据集
*
@return
*/
public
static
DefaultPieDataset getDataset() {
//
DatasetUtilities.createPieDatasetForColumn(arg0, arg1)
DefaultPieDataset pieDataset
=
new
DefaultPieDataset();
pieDataset.setValue(
"
苹果
"
,
100
);
pieDataset.setValue(
"
梨子
"
,
200
);
pieDataset.setValue(
"
葡萄
"
,
300
);
pieDataset.setValue(
"
香蕉
"
,
400
);
pieDataset.setValue(
"
荔枝
"
,
500
);
return
pieDataset;
}
/**
* 生成JfreeChart对象
*
@param
dataset
*
@param
title
*
@param
width
*
@param
height
*
@param
session
*
@param
pw
*
@param
useMap
*
@param
is3D
*
@return
*/
public
static
String createPieChart(Dataset dataset,String title,
int
width,
int
height,
HttpSession session, PrintWriter pw,String useMap,
boolean
is3D) {
String filename
=
""
;
PiePlot plot
=
null
;
if
(is3D){
plot
=
new
PiePlot3D((DefaultPieDataset)dataset);
//
3D饼图
}
else
{
plot
=
new
PiePlot((DefaultPieDataset)dataset);
}
plot.setURLGenerator(
new
StandardPieURLGenerator(
"
view.jsp
"
,
"
fruit
"
,
"
pieIdex
"
));
//
设定热区超链接
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(title);
//
可选，设置图片标题
plot.setToolTipGenerator(
new
StandardPieToolTipGenerator());
plot.setNoDataMessage(
"
无数据显示
"
);
StandardEntityCollection sec
=
new
StandardEntityCollection();
ChartRenderingInfo info
=
new
ChartRenderingInfo(sec);
try
{
filename
=
ServletUtilities.saveChartAsPNG(chart,
500
,
300
, info,
session);
ChartUtilities.writeImageMap(pw, useMap, info,
false
);
//
输出MAP信息
pw.flush();
}
catch
(IOException e) {
e.printStackTrace();
}
return
filename;
}
}
页面
<%
@ page contentType
=
"
text/html;charset=GBK
"
%>
<%
@ page import
=
"
com.tq365.chart.MapPieChart
"
%>
<%
@ page import
=
"
java.io.PrintWriter
"
%>
<
HTML
>
<
HEAD
>
<
META
http-equiv
=Content-Type
content
="text/html; charset=GBK"
>
</
HEAD
>
<
BODY
>
<%
String
filename
=
MapPieChart.createPieChart(MapPieChart
.getDataset(),
"
水果产量图
"
,
480
,
350
, session,
new
PrintWriter(out),
"
imgMap
"
,
false
);
String
file
=
request.getContextPath()
+
"
/servlet/DisplayChart?filename=
"
+
filename;
String
filename1
=
MapPieChart.createPieChart(MapPieChart
.getDataset(),
"
水果产量图
"
,
480
,
350
, session,
new
PrintWriter(out),
"
imgMap1
"
,
true
);
String
file1
=
request.getContextPath()
+
"
/servlet/DisplayChart?filename=
"
+
filename1;
%>
<
P
ALIGN
="CENTER"
>
<
img
src
="<%=file%>"
border
=0
usemap
="#imgMap"
>
</
P
>
<
P
ALIGN
="CENTER"
>
<
img
src
="<%=file1%>"
border
=0
usemap
="#imgMap1"
>
</
P
>
</
BODY
>
</
HTML
>