如何使用apache poi在饼图中显示百分比

Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("Pie Chart");

Row row = sheet.createRow(0);
row.createCell(0).setCellValue("Category");
row.createCell(1).setCellValue("Percentage");

row = sheet.createRow(1);
row.createCell(0).setCellValue("Category 1");
row.createCell(1).setCellValue(25);

row = sheet.createRow(2);
row.createCell(0).setCellValue("Category 2");
row.createCell(1).setCellValue(35);

// 添加更多的数据...

Drawing<?> drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 2, 2, 10, 20);

Chart chart = drawing.createChart(anchor);
ChartLegend legend = chart.getOrCreateLegend();
legend.setPosition(LegendPosition.BOTTOM);

PieChartData data = chart.getChartDataFactory().createPieChartData();

ChartAxis bottomAxis = chart.getChartAxisFactory().createCategoryAxis(AxisPosition.BOTTOM);
ChartAxis leftAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

ChartDataSource<String> category = DataSources.fromStringCellRange(sheet, new CellRangeAddress(1, numRows, 0, 0));
ChartDataSource<Number> values = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, numRows, 1, 1));

data.addSeries(category, values);
chart.plot(data);

FileOutputStream fileOut = new FileOutputStream("pie_chart.xlsx");
workbook.write(fileOut);
fileOut.close();
workbook.close();