分析文件时出错：分析文件时出错：无法在Java的XSSF中分析excel文件

Question

我试图用java将excel文件作为输入进行解析，我需要将文件中的前三行连接起来，并将它们作为一个标题放在第四行中，但文件解析对我不起作用，有什么想法吗

  // FP&A Parse file with Headers
public List<Map<String, String>> fpaParseExcelFileWithHeaders(MultipartFile file, List<String> headersList) {
    List<Map<String, String>> parsedFile = new ArrayList<>();
    List<String> headers = headersList;
    Map<String, String> cells = new HashMap<>();

    try {

        XSSFWorkbook workbook = new XSSFWorkbook(file.getInputStream());
        // Get first/desired sheet from the workbook
        XSSFSheet sheet = workbook.getSheetAt(0);

            // Iterate through each rows one by one
        Iterator<Row> rowIterator = sheet.iterator();

        Row row = rowIterator.next();

        // For each row, iterate through all the columns
       // Iterator<Cell> cellIterator = row.cellIterator();
        int colNum = 0;

        while (rowIterator.hasNext()) {
            row = rowIterator.next();
             // For each row, iterate through all the columns
            Iterator<Cell> cellIterator = row.cellIterator();
            // For each row, iterate through all the columns
           
            while (cellIterator.hasNext()) {
                Cell cell = cellIterator.next();
               // cells.put(headers.get(colNum++), getCharValue(cell).toString());
                headers.add(colNum + ((colNum + 1)), getCharValue(cell).toString());
            }
            
            parsedFile.add(cells);
            
            ++colNum;

        }
        workbook.close();

    } catch (Exception e) {
        e.printStackTrace();
    }

    return parsedFile;
}