java – Apache POI将一个系列名称添加到LineChart中

我使用Apache的svn中的示例编写了代码,所以我目前的方法看起来像这样：

Drawing drawing = question.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0,4,8,14,18);

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

LineChartData data = chart.getChartDataFactory().createLineChartData();

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

List<ReportQuestionModel> questionModels = groupModel.getQuestionModels();
for (ReportQuestionModel questionModel : questionModels) {

    List<ReportOptionModel> optionModels = questionModel.getOptionModels();
    for (ReportOptionModel optionModel : optionModels) {
        rowNum++;

        XSSFRow optionRow = question.createRow(rowNum);

        XSSFCell optionsCell = optionRow.createCell(0);
        optionsCell.setCellValue(optionModel.getAnswerText());

        long count = optionModel.getCount();
        totalResponses += count;

        XSSFCell optionsCountCell = optionRow.createCell(1);
        optionsCountCell.setCellValue(count);

        XSSFCell optionsPercentageCell = optionRow.createCell(2);
        optionsPercentageCell.setCellValue(optionModel.getPercentage());
    }
}

ChartDataSource<Number> xs = DataSources.fromNumericCellRange(question,new CellRangeAddress(8,1));
for (int i = 9; i <= rowNum; i ++) {
    ChartDataSource<Number> ys = DataSources.fromNumericCellRange(question,new CellRangeAddress(i,i,1));
    data.addSerie(xs,ys);
}
chart.plot(data,bottomAxis,leftAxis);

我找不到的是如何从列中获取默认的“系列1”,“系列2”,…,“系列n”名称作为我的值,在这种情况下是从“答案选项” .而目前的API中似乎没有任何方法来指定系列的名称.

有人可以帮我吗？