import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;import javax.imageio.ImageIO;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.DefaultDrawingSupplier;
import org.jfree.chart.plot.RingPlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;public class RingChart {public RingChart() {this.createChart();}@SuppressWarnings("deprecation")public void createChart() {JFreeChart chart = ChartFactory.createRingChart(null, this.createDataset(), true, false, false);chart.getLegend().setVisible(false);// 环形图RingPlot ringplot = (RingPlot) chart.getPlot();ringplot.setOutlineVisible(false);//{2}表示显示百分比ringplot.setLabelGenerator(new StandardPieSectionLabelGenerator("{2}"));ringplot.setBackgroundPaint(new Color(253,253,253));ringplot.setOutlineVisible(false);//设置标签样式ringplot.setLabelFont(new Font("宋体", Font.BOLD, 15));ringplot.setSimpleLabels(true);ringplot.setLabelLinkPaint(Color.WHITE);ringplot.setLabelOutlinePaint(Color.WHITE);ringplot.setLabelLinksVisible(false);ringplot.setLabelShadowPaint(null);ringplot.setLabelOutlinePaint(new Color(0,true));ringplot.setLabelBackgroundPaint(new Color(0,true));ringplot.setLabelPaint(Color.WHITE);ringplot.setSectionOutlinePaint(Color.WHITE);ringplot.setSeparatorsVisible(true);ringplot.setSeparatorPaint(Color.WHITE);ringplot.setShadowPaint(new Color(253,253,253));ringplot.setSectionDepth(0.58);ringplot.setStartAngle(90);ringplot.setDrawingSupplier(new DefaultDrawingSupplier(new Paint[] { new Color(134, 212, 222), new Color(174, 145, 195), new Color(255, 162, 195),new Color(249, 163, 86),new Color(119, 173, 195)},DefaultDrawingSupplier.DEFAULT_OUTLINE_PAINT_SEQUENCE, DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE,DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE, DefaultDrawingSupplier.DEFAULT_SHAPE_SEQUENCE));FileOutputStream fos_jpg = null;try {fos_jpg = new FileOutputStream("d:\\ring.png");ChartUtilities.writeChartAsPNG(fos_jpg,chart, 235, 230, null);System.out.println("成功");//以下由于jfreechart设置背景色后，背景会有留白，直接将目标图片截取ByteArrayOutputStream baos = new ByteArrayOutputStream();ChartUtilities.writeChartAsPNG(baos,chart, 240, 230, null);BufferedImage bi = ImageIO.read(new ByteArrayInputStream(baos.toByteArray()));BufferedImage sub = bi.getSubimage(5, 0, 230, 225);ImageIO.write(sub, "png", new File("d:\\ring_sub.png"));} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {fos_jpg.close();} catch (Exception e) {System.out.println(e.getMessage());}}}//测试数据public PieDataset createDataset() {DefaultPieDataset dataSet = new DefaultPieDataset();int i, j;String[] key = { "私募股权","房地产","基金","现金宝宝","股票" };int[] value = { 20, 20, 20, 30, 10 };for (i = 0, j = 0; i < name.length && j < value.length; i++, j++) {dataSet.setValue(name[i], value[j]);}return dataSet;}public static void main(String[] args) {new RingChart();}
}