用jFreeChart制作一个饼状的图形统计图

来源：互联网发布：dsp竞价算法编辑：程序博客网时间：2024/05/01 21:26
package com.test.chart;import java.awt.Color;import java.awt.Font;import java.io.FileOutputStream;import java.text.DecimalFormat;import java.text.NumberFormat;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.StandardPieSectionLabelGenerator;import org.jfree.chart.plot.PiePlot3D;import org.jfree.data.general.DefaultPieDataset;import org.jfree.util.Rotation;public class PieChartDemo {private static DefaultPieDataset getDataSet() { DefaultPieDataset dataset = new DefaultPieDataset(); dataset.setValue("剩余容量",0.5); dataset.setValue("已用容量",1.5); return dataset; }  public static void main(String[] args) throws Exception {  Font font = new Font("Microsoft YaHei",Font.BOLD,12);  DefaultPieDataset data = getDataSet();  JFreeChart chart = ChartFactory.createPieChart3D(null, data, false, false, false );  //获得3D的水晶饼图对象 PiePlot3D pieplot3d = (PiePlot3D) chart.getPlot();  //获取图像的对象，设置字体。不设置字体中文乱码   pieplot3d.setLabelFont(font);    //设置开始角度 pieplot3d.setStartAngle(70D); //设置方向为”顺时针方向“ pieplot3d.setDirection(Rotation.CLOCKWISE); //设置透明度，0.5F为半透明，1为不透明，0为全透明 pieplot3d.setForegroundAlpha(0.6F); pieplot3d.setNoDataMessage("无数据显示");   //给标签的显示加上百分比格式 StandardPieSectionLabelGenerator generator = new StandardPieSectionLabelGenerator(("{0}{2}"), NumberFormat.getNumberInstance(),new DecimalFormat("0.00%")); pieplot3d.setLabelGenerator(generator);  //标签与图形之间的距离 //pieplot3d.setLabelLinkMargin(-0.05); //设置连线的颜色 //pieplot3d.setLabelLinkPaint(new Color(0, 180, 205)); pieplot3d.setSimpleLabels(true);  //为分区设置指定的颜色 pieplot3d.setSectionPaint("剩余容量", new Color(125, 125, 125));         pieplot3d.setSectionPaint("已用容量", new Color(0, 180, 205));  //设置绘图面板外边以及阴影的填充颜色 pieplot3d.setOutlinePaint(Color.RED);  pieplot3d.setShadowPaint(Color.BLUE);   //设置整个面板的背景色 pieplot3d.setBackgroundPaint(new Color(238, 241, 242)); //pieplot3d.setBackgroundPaint(null);  //设置标签背景颜色、边框颜色、阴影颜色和文字颜色 pieplot3d.setLabelBackgroundPaint(null); pieplot3d.setLabelOutlinePaint(null); pieplot3d.setLabelShadowPaint(null); pieplot3d.setLabelPaint(new Color(120, 120, 120));          //重新设置图例的字体，保证汉字显示     //LegendTitle legend = chart.getLegend();     //legend.setItemFont(font);      FileOutputStream fos_jpg = null; try { fos_jpg = new FileOutputStream("D:\\fruit.jpg"); ChartUtilities.writeChartAsJPEG(fos_jpg, chart, 490, 300, null); } finally { try { fos_jpg.close(); } catch(Exception e) {} }}}
效果图如下：
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