package gov.gwssi.tax.nspg.datadisposal.
import java.awt.Insets.
import java.awt.Image.
import java.io.PrintWriter.
import java.text.SimpleDateFormat.
import java.util.Date.
import java.util.ArrayList.
import java.util.Iterator.
import java.util.Locale.
import java.text.NumberFormat.
import javax.servlet.http.HttpSession.
import org.jfree.data.*.
import org.jfree.chart.*.
import org.jfree.chart.axis.*.
import org.jfree.chart.renderer.VerticalBarRenderer.
import org.jfree.chart.renderer.StandardXYItemRenderer.
import org.jfree.chart.plot.*.
import org.jfree.chart.entity.*.
import org.jfree.chart.tooltips.*.
import org.jfree.chart.urls.*.
import org.jfree.chart.servlet.*.
import java.awt.Font.
/**
* Title:
* Description:
* Copyright: Copyright (c) 2003
* Company:
* @author jagie
* @version 1.0
*/
public class GSPieChart {
public static void main(String[] args) {
Long[] testData = {
new Long(10), new Long(20), new Long(30), new Long(40)}.
generatePieChart(testData, "", null, new PrintWriter(System.out), 580, 250).
}
/**
* 生成图像文件
* @param datas Long[]数组
* @param targetUrl 点饼形图上的扇形，定向到的url
* @param session httpsession
* @param pw PrintWriter
* @param w 生成的图的宽度
* @param h 生成的图的高度
* @return 生成的图像文件的路径
*/
public static String generatePieChart(Long[] datas, String targetUrl,
HttpSession session, PrintWriter pw,
int w, int h) {
String filename = null.
try {
DefaultPieDataset data = new DefaultPieDataset().
data.setValue("正常纳税人", datas[0]).
data.setValue("异常纳税人", datas[1]).
data.setValue("数据不全纳税人", datas[2]).
data.setValue("未处理纳税人", datas[3]).
// Create the chart object
Pie3DPlot plot = new Pie3DPlot(data).
plot.setInsets(new Insets(0, 5, 5, 5)).
plot.setForegroundAlpha(0.6f).
plot.setSectionLabelType(plot.NO_LABELS).
plot.setURLGenerator(new StandardPieURLGenerator(targetUrl, "type")).
plot.setToolTipGenerator(new StandardPieToolTipGenerator()).
JFreeChart chart = new JFreeChart(
"数据处理结果统计图", JFreeChart.DEFAULT_TITLE_FONT, plot, true).
chart.setTitle(new TextTitle(
"数据处理结果统计图", new Font("黑体", Font.BOLD, 15))).
StandardLegend sl = (StandardLegend) chart.getLegend().
sl.setItemFont(new Font("黑体", Font.TRUETYPE_FONT, 12)).
chart.setBackgroundPaint(new java.awt.Color(254, 254, 141)).
//因为jfreechart把生成的png文件保存在系统的临时文件夹中，你需要在适当的
//时候调用session.removeAttribute("JFreeChart_Deleter")，这样可以保证png文
//件被删除掉
ChartRenderingInfo info = new ChartRenderingInfo(new
StandardEntityCollection()).
filename = ServletUtilities.saveChartAsPNG(chart, w, h, info, session).
// Write the image map to the PrintWriter
ChartUtilities.writeImageMap(pw, filename, info).
pw.flush().
}
catch (Exception e) {
System.out.println("Exception - " e.toString()).
e.printStackTrace(System.out).
filename = "public_error_500x300.png".
}
return filename.
}
}
.........java代码.................
<%
//以下部分为图象输出
String targetUrl="../servlet/gov.gwssi.tax.nspg.
controlservlet.GSMainControlServlet?id=" sid.
Long[] datas={normals,new Long(totalAbnormal),
dataLacks,notProcesses}.
String filename=GSPieChart.generatePieChart
(datas,targetUrl,session,new PrintWriter(out),580,250).
String graphURL = request.getContextPath()
"/servlet/DisplayChart?filename=" filename.
%> |