package com.ghg.java;

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.chart.plot.PlotOrientation;

import org.jfree.data.category.CategoryDataset;

import org.jfree.data.category.DefaultCategoryDataset;

import org.jfree.data.general.DefaultPieDataset;

import org.jfree.data.general.PieDataset;

import org.jfree.ui.ApplicationFrame;

 

public class JfreeChartOne extends ApplicationFrame {

    private static final long serialVersionUID = 1L;

    public JfreeChartOne(String s)

    {

       super(s);

       setContentPane(createJPanel());

    }

    public static void main(String[] args) {

       JfreeChartOne one=new JfreeChartOne("CityInfoPort公司组织架构图");

       one.pack();

       one.setVisible(true);

    }

    //利用静态方法设定数据源(饼状图)

    public static PieDataset createPieDataset() {

       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;

    }

    // 通过ChartFactory创建JFreeChart的实例

    public static JFreeChart createJFreeChart(PieDataset p)

    {

       JFreeChart a =ChartFactory.createPieChart("CityInfoPort公司组织架构图",p, true, true, true);

       PiePlot  pie=(PiePlot )a.getPlot();

       pie.setLabelFont(new Font("SansSerif",Font.BOLD,12));

       pie.setNoDataMessage("No data available");

       pie.setCircular(true);

       pie.setLabelGap(0.01D);//间距

       return a;

    }

    public static JPanel  createJPanel (){

       JFreeChart jfreechart = createJFreeChart(createPieDataset());

       return new ChartPanel(jfreechart);

    }

}

效果如图所示：

two：创建类别图

/**

 * JfreeChartTest.java

 * author:longlong

 * May 31, 2007

 */

package com.ghg.java;

 

import org.jfree.data.category.DefaultCategoryDataset;

import org.jfree.data.general.DefaultPieDataset;

import org.jfree.chart.*;

import org.jfree.chart.plot.PlotOrientation;

 

public class JfreeChartTest {

    public static void main(String[] args) {

//     创建类别图（Category）数据对象

       DefaultCategoryDataset dataset = new DefaultCategoryDataset();

       dataset.addValue(100, "北京", "苹果");

       dataset.addValue(100, "上海", "苹果");

       dataset.addValue(100, "广州", "苹果");

       dataset.addValue(200, "北京", "梨子");

       dataset.addValue(200, "上海", "梨子");

       dataset.addValue(200, "广州", "梨子");

       dataset.addValue(300, "北京", "葡萄");

       dataset.addValue(300, "上海", "葡萄");

       dataset.addValue(300, "广州", "葡萄");

       dataset.addValue(400, "北京", "香蕉");

       dataset.addValue(400, "上海", "香蕉");

       dataset.addValue(400, "广州", "香蕉");

       dataset.addValue(500, "北京", "荔枝");

       dataset.addValue(500, "上海", "荔枝");

       dataset.addValue(500, "广州", "荔枝");

       JFreeChart chart=ChartFactory.createBarChart3D("水果产量图", "水果", "水果", dataset, PlotOrientation.VERTICAL, true, true, true);

       ChartFrame  frame=new ChartFrame ("水果产量图 ",chart,true);

       frame.pack();

       frame.setVisible(true);

    }

}

按照one的重构办法也可以对这个程序实现重构。