如何使用POI 4.0.1 Java向条形图添加垂直线

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.ss.usermodel.charts.*;
import org.apache.poi.ss.usermodel.charts.ChartDataSource;
import org.apache.poi.ss.usermodel.charts.ChartFactory;
import org.apache.poi.ss.usermodel.charts.LineChartData;
import org.apache.poi.ss.usermodel.charts.LineChartSeries;

import java.io.FileOutputStream;
import java.io.IOException;

public class AddVerticalLineToBarChart {
    public static void main(String[] args) throws IOException {
        // 创建工作簿
        Workbook workbook = new XSSFWorkbook();
        
        // 创建工作表
        Sheet sheet = workbook.createSheet("BarChart with Vertical Line");

        // 创建数据
        Row row1 = sheet.createRow(0);
        row1.createCell(0).setCellValue("Category");
        row1.createCell(1).setCellValue("Value 1");
        row1.createCell(2).setCellValue("Value 2");

        Row row2 = sheet.createRow(1);
        row2.createCell(0).setCellValue("A");
        row2.createCell(1).setCellValue(10);
        row2.createCell(2).setCellValue(20);

        Row row3 = sheet.createRow(2);
        row3.createCell(0).setCellValue("B");
        row3.createCell(1).setCellValue(15);
        row3.createCell(2).setCellValue(25);

        // 创建条形图
        Drawing<?> drawing = sheet.createDrawingPatriarch();
        ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 1, 14, 20);
        Chart chart = drawing.createChart(anchor);

        // 创建分类数据源
        ChartDataSource<String> categories = DataSources.fromStringCellRange(sheet, new CellRangeAddress(1, 2, 0, 0));

        // 创建值数据源
        ChartDataSource<Number> values1 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 2, 1, 1));
        ChartDataSource<Number> values2 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 2, 2, 2));

        // 创建条形图系列
        LineChartData data = chart.getChartDataFactory().createLineChartData();
        LineChartSeries series1 = data.addSeries(categories, values1);
        LineChartSeries series2 = data.addSeries(categories, values2);
        chart.plot(data);

        // 创建垂直线
        LineChartSeries verticalLine = data.addSeries(categories, new Number[] {12.5, 12.5});
        verticalLine.setTitle("Vertical Line");

        // 将条形图添加到工作表
        drawing.createChart(anchor).plot(data);

        // 保存工作簿到文件
        FileOutputStream fileOut = new FileOutputStream("bar_chart_with_vertical_line.xlsx");
        workbook.write(fileOut);
        fileOut.close();

        // 关闭工作簿
        workbook.close();
    }
}