如何使用JFreeCharts将图例绘制为表格？

我能够像这样绘制这个图表：

但我想这样绘制它，这意味着在图表的底部和表格（至少看起来像一个）。

这是我的代码：

package charts; import java.awt.*; import java.io.*; import org.jfree.chart.ChartUtilities; import org.jfree.chart.ChartFactory; import org.jfree.chart.JFreeChart; import org.jfree.chart.block.BlockBorder; import org.jfree.chart.labels.PieSectionLabelGenerator; import org.jfree.chart.labels.StandardPieSectionLabelGenerator; import org.jfree.chart.plot.PiePlot; import org.jfree.chart.title.LegendTitle; import org.jfree.chart.title.TextTitle; import org.jfree.data.general.DefaultPieDataset; import org.jfree.ui.RectangleEdge; public class PieChart { public static void main( String[ ] args ) throws Exception { DefaultPieDataset dataset = new DefaultPieDataset(); dataset.setValue("A", new Double( 36.95 )); dataset.setValue("B", new Double( 31.51 )); dataset.setValue("C", new Double( 12.44 )); dataset.setValue("D", new Double( 6.41 )); dataset.setValue("E", new Double( 2.76 )); dataset.setValue("F", new Double( 2.29 )); dataset.setValue("G", new Double( 1.71 )); dataset.setValue("H", new Double(1.21)); dataset.setValue("I", new Double(4.71)); JFreeChart chart = ChartFactory.createPieChart( "", // chart title dataset, // dataset true, // legends true, // tooltips false); // urls // remove legend border chart.getLegend().setFrame(BlockBorder.NONE); PiePlot plot = (PiePlot) chart.getPlot(); plot.setSimpleLabels(true); PieSectionLabelGenerator generator = new StandardPieSectionLabelGenerator("{2}"); plot.setLabelGenerator(generator); // background plot.setBackgroundPaint(Color.WHITE); // plot.setOutlineVisible(false); // remove image border // label plot.setLabelFont(new Font("Courier New", Font.BOLD, 16)); plot.setLabelPaint(Color.WHITE); Color transparent = new Color(0.0f, 0.0f, 0.0f, 0.0f); plot.setLabelBackgroundPaint(transparent); //background plot.setLabelOutlinePaint(transparent); //border plot.setLabelShadowPaint(transparent); //shadow // legend plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator("{0}: {1}")); // sections // use gradients and white borders for the section colours plot.setSectionPaint("A", new Color(126, 208, 150)); plot.setSectionPaint("B", new Color(41, 157, 135)); plot.setSectionPaint("C", new Color(25, 144, 212)); plot.setSectionPaint("D", new Color(95, 85, 25)); plot.setSectionPaint("E", new Color(22, 90, 63)); plot.setSectionPaint("F", new Color(134, 125, 25)); plot.setSectionPaint("G", new Color(226, 200, 14)); plot.setSectionPaint("H", new Color(241, 172, 18)); plot.setSectionPaint("I", new Color(245, 200, 51)); plot.setBaseSectionOutlinePaint(Color.WHITE); plot.setSectionOutlinesVisible(true); // chart title at the bottom TextTitle legendText = new TextTitle("THIS IS JUST A TEST"); legendText.setPosition(RectangleEdge.BOTTOM); chart.addSubtitle(legendText); LegendTitle legend = chart.getLegend(); legend.setPosition(RectangleEdge.RIGHT); int width = 640; /* Width of the image */ int height = 480; /* Height of the image */ File pieChart = new File( "PieChart.png" ); ChartUtilities.saveChartAsPNG(pieChart, chart, width, height); } } 

Answer 1

以下是如何自定义图例布局：

 // remove default legend chart.removeLegend(); // create and add legend LegendTitle legend = new LegendTitle(plot, new GridArrangement(dataset.getItemCount(), 1), new GridArrangement(1, 1)); legend.setPosition(RectangleEdge.BOTTOM); chart.addLegend(legend); // add text title after the legend 

但是，根据需要自定义图例项目布局要困难得多。 您需要覆盖一堆方法，例如createLegendItemBlock() ，并手动摆弄LegendTitle的Block and Arrangement API。

或者，您可以完全绕过JFreechart API，并使用Swing组件生成您自己的图例面板。 看看这个例子 。