Apache POI散点图创建

当前使用POI生成散点图，但是图表却很奇怪：左上角的一个是使用我的代码生成的，另一个是在Excel中手动生成的。它们都是“带有直线和标记的散点图”类型，但是由于某种原因，生成的图表显示了曲线。另一个问题是，每个数据点在图例中分别列出，并指定了另一种颜色。

public void GenerateChart(XSSFSheet sheet) {
    XSSFDrawing drawing = sheet.createDrawingPatriarch();
    XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 10, 15);

    XSSFChart chart = drawing.createChart(anchor);
    XSSFChartLegend legend = chart.getOrCreateLegend();
    legend.setPosition(LegendPosition.TOP_RIGHT);

    XSSFValueAxis bottomAxis = chart.createValueAxis(AxisPosition.BOTTOM);
    XSSFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
    leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

    CellRangeAddress crXData = new CellRangeAddress(1, sheet.getLastRowNum(), 0, 0);
    CellRangeAddress crYData = new CellRangeAddress(1, sheet.getLastRowNum(), 1, 1);
    CellReference crTitle = new CellReference(0,1);
    Cell cell = sheet.getRow(crTitle.getRow()).getCell(crTitle.getCol());

    ChartDataSource<Number> dsXData = DataSources.fromNumericCellRange(sheet, crXData);
    ChartDataSource<Number> dsYData = DataSources.fromNumericCellRange(sheet, crYData);

    XSSFScatterChartData data = chart.getChartDataFactory().createScatterChartData();
    ScatterChartSeries seriesTitler = data.addSerie(dsXData, dsYData);

    seriesTitler.setTitle(cell.getStringCellValue());
    chart.plot(data, bottomAxis, leftAxis);
}

使用Apache POI 3.17 此处的文档显示XSSFScatterChartData不推荐使用其他POI ，而应XDDFScatterChartData改用。但是我不知道在哪里可以使用.jar来使用它。我以为它是Beta版？

What I want to do is to generate something like the chart on the right of the image, the manually created one. Since POI allowing chart creation seems to be a relatively new thing, I haven't been able to find any clues. Anyone know the trick?