jfreechart之饼状图

import java.io.FileNotFoundException;  import java.io.FileOutputStream;  import java.io.IOException;  import org.jfree.chart.ChartFactory;  import org.jfree.chart.ChartUtilities;  import org.jfree.chart.JFreeChart;  import org.jfree.chart.plot.PiePlot;  import org.jfree.data.general.DefaultPieDataset;    /**   *    * @author 刘毅   * @date 2010-2-25   * @ClassName Pie.java   * @Email liu_yi126@163.com   * @param  饼状图   * @param   */  public class Pie {      public static void createPie(){       DefaultPieDataset dataset = new DefaultPieDataset();    //第一个参数是数据的名称，第二个数据是数据的值。    dataset.setValue("测试1", 100);    dataset.setValue("测试2", 200);    dataset.setValue("测试3", 300);    dataset.setValue("测试4", 100);    JFreeChart chart = ChartFactory.createPieChart("测试,标题", dataset, true, false, false);    //炸开的饼图    PiePlot  pp = (PiePlot) chart.getPlot();    pp.setExplodePercent("测试1",1); //炸开的饼图需要和上面数据的名字一致    //设置中文字体    JfreeChinese.setChineseForPie(chart);    FileOutputStream fos = null;    try {        fos = new FileOutputStream("src/pie.png");        ChartUtilities.writeChartAsPNG(fos, chart, 400, 300);    } catch (FileNotFoundException e) {     e.printStackTrace();    } catch (IOException e) {     e.printStackTrace();    } finally {        try {         if(null != fos){          fos.close();         }     } catch (IOException e) {      e.printStackTrace();     }    }   }      public static void main(String[] args) {    Pie.createPie();   }    }