JfreeChart例子

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PieCharts.java:

package test;import java.awt.Font;import javax.swing.JPanel;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PiePlot;import org.jfree.data.general.DefaultPieDataset;import org.jfree.data.general.PieDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;public class PieCharts extends ApplicationFrame {private static final long serialVersionUID = 1L;public PieCharts(String s) {super(s);setContentPane(createDemoPanel());}// 生成显示图表的面板public static JPanel createDemoPanel() {JFreeChart jfreechart = createChart(createDataset());return new ChartPanel(jfreechart);}// 生成饼图数据集对象public static PieDataset createDataset() {DefaultPieDataset defaultpiedataset = new DefaultPieDataset();defaultpiedataset.setValue("管理人员", 10.02D);defaultpiedataset.setValue("市场人员", 20.23D);defaultpiedataset.setValue("开发人员", 60.02D);defaultpiedataset.setValue("OEM人员", 10.02D);defaultpiedataset.setValue("其他人员", 5.11D);return defaultpiedataset;}// 生成图表主对象JFreeChartpublic static JFreeChart createChart(PieDataset piedataset) {// 定义图表对象JFreeChart jfreechart = ChartFactory.createPieChart("CityInfoPort公司组织架构图", piedataset, true, true, false);// 获得图表显示对象PiePlot pieplot = (PiePlot) jfreechart.getPlot();// 设置图表标签字体pieplot.setLabelFont(new Font("SansSerif", Font.BOLD, 12));pieplot.setNoDataMessage("No data available");pieplot.setCircular(true);pieplot.setLabelGap(0.01D);// 间距return jfreechart;}public static void main(String[] args) {PieCharts fjc = new PieCharts("CityInfoPort公司组织架构图");fjc.pack();RefineryUtilities.centerFrameOnScreen(fjc);fjc.setVisible(true);}}

效果图：

ChartDemo.java:

package test;import java.awt.BasicStroke;import java.awt.Color;import java.awt.Font;import java.io.IOException;import java.io.PrintWriter;import java.text.DecimalFormat;import java.text.NumberFormat;import javax.servlet.http.HttpSession;import org.jfree.chart.ChartFactory;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.StandardPieSectionLabelGenerator;import org.jfree.chart.labels.StandardPieToolTipGenerator;import org.jfree.chart.plot.PiePlot3D;import org.jfree.chart.servlet.ServletUtilities;import org.jfree.chart.title.TextTitle;import org.jfree.chart.urls.StandardPieURLGenerator;import org.jfree.data.general.DefaultPieDataset;import org.jfree.data.general.PieDataset;import org.jfree.util.Rotation;public class ChartDemo {String chartTitle = "电信业务组织架构图";public String getPieChart(HttpSession session, PrintWriter writer) {String fileName = null;// 生成饼图数据集对象PieDataset piedataset = createDataset();// 建立JFreeChartJFreeChart chart = createChart(piedataset);ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());try {fileName = ServletUtilities.saveChartAsJPEG(chart, 500, 300, info,session);// 生成图片// Write the image map to the PrintWriterChartUtilities.writeImageMap(writer, fileName, info, false);} catch (IOException e) {e.printStackTrace();}// writer.flush();// 返回生成图片的文件名return fileName;}// 生成饼图数据集对象public PieDataset createDataset() {DefaultPieDataset pieDataset = new DefaultPieDataset();/* 第一个参数为名称，第二个参数是double数 */pieDataset.setValue("我的e家", 55.33);pieDataset.setValue("小灵通", 20.8);pieDataset.setValue("天翼", 10.9);pieDataset.setValue("商务领航", 10);pieDataset.setValue("互联星空", 10);return pieDataset;}// 生成图表主对象JFreeChartpublic JFreeChart createChart(PieDataset piedataset) {// 定义图表对象// JFreeChart chart = ChartFactory.createPieChart(chartTitle,// piedataset,// true, true, false);JFreeChart chart = ChartFactory.createPieChart3D(chartTitle,piedataset, true, true, false);// 设置饼图下面的图例的字体样式chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));// 设置饼图背景色chart.setBackgroundPaint(Color.white);// 设置饼图标题属性Font font = new Font("宋体", Font.PLAIN, 18);TextTitle textTitle = new TextTitle(chartTitle, font);chart.setTitle(textTitle);// 获取图形的画布PiePlot3D pieplot = (PiePlot3D) chart.getPlot();// 设定链接 ("link.jsp","section"));//section为参数，不填写则默认为categorypieplot.setURLGenerator(new StandardPieURLGenerator("link.jsp","section"));// 设定图片的背景透明度（0-1.0之间）pieplot.setBackgroundAlpha(0.8f);// 设定图片的前景透明度（0-1.0之间）pieplot.setForegroundAlpha(0.6f);// 设置方向为顺时针方向pieplot.setDirection(Rotation.CLOCKWISE);// 指定 section 轮廓线的颜色pieplot.setOutlinePaint(Color.BLUE);// 抽离第一个 section 出来？？？？？？？？怎么实现？// 指定 section 轮廓线的厚度pieplot.setOutlineStroke(new BasicStroke(2));// 设置第一个 section 的开始位置，默认是12点钟方向//pieplot.setStartAngle(0);// 设置图形背景色pieplot.setBackgroundPaint(Color.white);// 设置图表标签字体pieplot.setLabelFont(new Font("宋体", Font.PLAIN, 12));// 没有数据的时候显示的内容pieplot.setNoDataMessage("无数据显示");// 指定显示的饼图上圆形(false)还椭圆形(true)pieplot.setCircular(false);// 间距pieplot.setLabelGap(0.02D);pieplot.setToolTipGenerator(new StandardPieToolTipGenerator("{0}: ({1}万, {2})", NumberFormat.getNumberInstance(),new DecimalFormat("0.00%")));// // 显示百分比// setLabelGenerator：设置饼图标签的百分比样式// setLegendLabelGenerator：设置饼图下面的图例的百分比样式// // 图片中显示百分比:默认方式// pieplot.setLabelGenerator(new// StandardPieSectionLabelGenerator(StandardPieToolTipGenerator.DEFAULT_TOOLTIP_FORMAT));// // 图片中显示百分比:自定义方式，{0} 表示选项， {1} 表示数值， {2} 表示所占比例 ,小数点后两位pieplot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}万({2})", NumberFormat.getNumberInstance(),new DecimalFormat("0.00%")));pieplot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator("{0}: ({1}万, {2})"));// // 图例显示百分比:自定义方式， {0} 表示选项， {1} 表示数值， {2} 表示所占比例// pieplot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(// "{0}={1}({2})"));return chart;}}

index3.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ page import="test.ChartDemo"%><%@ page import="java.io.PrintWriter"%><%ChartDemo xyChart = new ChartDemo();String fileName = xyChart.getPieChart(session, new PrintWriter(out));String graphURL = request.getContextPath()+ "/servlet/DisplayChart?filename=" + fileName;%><html><head><title>JFreeChart使用例子</title></head><body><img src="<%=graphURL%>" width=500 height=350 border=0usemap="#<%= fileName %>"></body></html>

效果图:

饼图1

ChartDemo.java:

ChartServlet.java:

package test;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;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.servlet.ServletUtilities;import org.jfree.data.general.PieDataset;public class ChartServlet extends HttpServlet {public ChartServlet() {super();}public void destroy() {super.destroy(); // Just puts "destroy" string in log}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String fileName = null;response.setContentType("text/html");//response.setContentType("image/jpeg");PrintWriter out = response.getWriter();HttpSession session = request.getSession();ChartDemo chartDemo = new ChartDemo();fileName = chartDemo.getPieChart(session, out);//// 生成饼图数据集对象//PieDataset piedataset = chartDemo.createDataset();//// 建立JFreeChart//JFreeChart chart = chartDemo.createChart(piedataset);////ChartRenderingInfo info = new ChartRenderingInfo(//new StandardEntityCollection());////fileName = ServletUtilities.saveChartAsJPEG(chart, 500, 300, info,//session);// 生成图片////ChartUtilities.writeChartAsJPEG(new FileOutputStream("D:// 项目状态分布.jpg"),100,chart,640,480,null);////ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, 500, 300);//// 用于把保存的图片文件以字节流的形式写入用户界面//ChartUtilities.writeImageMap(out, fileName, info, false);String graphURL = request.getContextPath()+ "/servlet/DisplayChart?filename=" + fileName;request.setAttribute("fileName", fileName);request.setAttribute("graphURL", graphURL);request.getRequestDispatcher("/index.jsp").forward(request, response);// 关闭IO流out.flush();}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {this.doGet(request, response);}public void init() throws ServletException {// Put your code here}}

index.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><%@ page import="java.io.PrintWriter"%><html><head><title>JFreeChart使用例子</title></head><body><img src="${graphURL}" mce_src="${graphURL}" width="650" height="380" border="0"usemap="#${fileName}"></body></html>

效果图:

饼图2