在selenium中读取excel中的空白单元格时无法处理空白单元格？

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

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileInputStream;
import java.io.IOException;

public class ExcelReader {
    public static void main(String[] args) {
        try {
            FileInputStream file = new FileInputStream("path/to/your/excel/file.xlsx");
            Workbook workbook = new XSSFWorkbook(file);
            Sheet sheet = workbook.getSheetAt(0);

            for (Row row : sheet) {
                for (Cell cell : row) {
                    if (cell.getCellType() == CellType.BLANK) {
                        // 处理空白单元格
                        System.out.println("Blank cell found!");
                    } else {
                        // 处理非空白单元格
                        System.out.println(cell.getStringCellValue());
                    }
                }
            }

            workbook.close();
            file.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}