firstjfreechart.txt

JFreeChart介绍及经典入门资料（绝对一手）

package ssq;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import java.awt.Font;
import javax.swing.*;


public class FirstJFreeChart extends ApplicationFrame {
  //构造函数
  public FirstJFreeChart(String s){
    super(s);
    setContentPane(createDemoPanel());
  }
  
  public static void main(String[] args){
    FirstJFreeChart fjc = new FirstJFreeChart("CityInfoPort公司组织架构图");
    fjc.pack();
    RefineryUtilities.centerFrameOnScreen(fjc);
    fjc.setVisible(true);
  }
  
  //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JFreeChart
  public 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;
  }
  
  //生成显示图表的面板
  public static JPanel createDemoPanel(){
    JFreeChart jfreechart = createChart(createDataset());
    return new ChartPanel(jfreechart);
  }
  
}