如何将图像集置于excel java单元格的中心位置？

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>

Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("Sheet1");

InputStream inputStream = new FileInputStream("path/to/image.jpg");
byte[] imageBytes = IOUtils.toByteArray(inputStream);
int pictureIdx = workbook.addPicture(imageBytes, Workbook.PICTURE_TYPE_JPEG);
inputStream.close();

CreationHelper helper = workbook.getCreationHelper();
Drawing<?> drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = helper.createClientAnchor();

// 设置图像在单元格中的位置
anchor.setCol1(cell.getColumnIndex());
anchor.setCol2(cell.getColumnIndex() + 1);
anchor.setRow1(cell.getRowIndex());
anchor.setRow2(cell.getRowIndex() + 1);

Picture picture = drawing.createPicture(anchor, pictureIdx);
picture.resize(); // 可选：调整图像大小以适应单元格

FileOutputStream fileOut = new FileOutputStream("path/to/output.xlsx");
workbook.write(fileOut);
fileOut.close();
workbook.close();