使用 Apache POI 设置 Excel sheet 散点图标记图标的颜色

Question

scatter chart example included with Apache POI shows how to set the color of a line (that connects markers in a series), but I cannot figure out how to set the color of a marker for a series. I see that I can change the marker icon (with setMarkerStyle (javadoc)，但似乎没有可编辑的颜色属性)。

来自我怀疑有必要禁用不同的颜色配置，但我仍然不知道如何在该步骤之后设置颜色（如果下面的行是必要的）。

((XSSFChart)chart).getCTChart().getPlotArea().getScatterChartArray(0) .addNewVaryColors().setVal(false);

如何在下面的示例中指定标记图标的颜色？

public class ScatterChart {

    public static void main(String[] args) throws IOException {
        try (XSSFWorkbook wb = new XSSFWorkbook()) {
            XSSFSheet sheet = wb.createSheet("Sheet 1");
            final int NUM_OF_ROWS = 3;
            final int NUM_OF_COLUMNS = 10;

            // Create a row and put some cells in it. Rows are 0 based.
            Row row;
            Cell cell;
            for (int rowIndex = 0; rowIndex < NUM_OF_ROWS; rowIndex++) {
                row = sheet.createRow((short) rowIndex);
                for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
                    cell = row.createCell((short) colIndex);
                    cell.setCellValue(colIndex * (rowIndex + 1.0));
                }
            }

            XSSFDrawing drawing = sheet.createDrawingPatriarch();
            XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 10, 15);

            XSSFChart chart = drawing.createChart(anchor);
            XDDFChartLegend legend = chart.getOrAddLegend();
            legend.setPosition(LegendPosition.TOP_RIGHT);

            XDDFValueAxis bottomAxis = chart.createValueAxis(AxisPosition.BOTTOM);
            bottomAxis.setTitle("x"); // 
            XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
            leftAxis.setTitle("f(x)");
            leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

            XDDFDataSource<Double> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
            XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));
            XDDFNumericalDataSource<Double> ys2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(2, 2, 0, NUM_OF_COLUMNS - 1));


            XDDFScatterChartData data = (XDDFScatterChartData) chart.createData(ChartTypes.SCATTER, bottomAxis, leftAxis);
            XDDFScatterChartData.Series series1 = (XDDFScatterChartData.Series) data.addSeries(xs, ys1);
            series1.setTitle("2x", null); // 
            series1.setSmooth(false); // 
            XDDFScatterChartData.Series series2 = (XDDFScatterChartData.Series) data.addSeries(xs, ys2);
            series2.setTitle("3x", null);
            chart.plot(data);

            solidLineSeries(data, 0, PresetColor.CHARTREUSE);
            solidLineSeries(data, 1, PresetColor.TURQUOISE);

            // Write the output to a file
            try (FileOutputStream fileOut = new FileOutputStream("ooxml-scatter-chart.xlsx")) {
                wb.write(fileOut);
            }
        }
    }

    private static void solidLineSeries(XDDFChartData data, int index, PresetColor color) {
        XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(color));
        XDDFLineProperties line = new XDDFLineProperties();
        line.setFillProperties(fill);
        XDDFChartData.Series series = data.getSeries().get(index);
        XDDFShapeProperties properties = series.getShapeProperties();
        if (properties == null) {
            properties = new XDDFShapeProperties();
        }
        properties.setLineProperties(line);
        series.setShapeProperties(properties);
    }
}

Answer 1

您链接的上一个问题是从 2018 年 5 月开始的，是关于从 apache poi 到版本 3.17 的纯 XSSFChart 内容。这已经过时了，因为 apache poi 4.0.0 引入了新的 XDDF 内容。

然而，直到现在仅使用高级别 XDDF 类才支持设置标记颜色。标记具有形状属性，具有与系列本身相同类型的填充属性。所以我们可以使用 XDDFSolidFillProperties 和 XDDFShapeProperties 作为线路设置。但是要获得标记，我们需要使用底层 ooxml-schemas-1.4 beans。

示例：

...
series2.setMarkerStyle(MarkerStyle.DIAMOND);
series2.setMarkerSize((short)15);
XDDFSolidFillProperties fillMarker = new XDDFSolidFillProperties(XDDFColor.from(new byte[]{(byte)0xFF, (byte)0xFF, 0x00}));
XDDFShapeProperties propertiesMarker = new XDDFShapeProperties();
propertiesMarker.setFillProperties(fillMarker);
chart.getCTChart().getPlotArea().getScatterChartArray(0).getSerArray(1).getMarker()
     .addNewSpPr().set(propertiesMarker.getXmlObject());
...

使用 Apache POI 设置 Excel sheet 散点图标记图标的颜色

Setting the color of an Excel sheet scatter chart marker icon with Apache POI

java

excel

charts

scatter-plot

apache-poi