打印空的Excel单元格

Question

这是我的代码

import java.io.FileInputStream;
import java.util.Iterator;
import java.util.Vector;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;

public class ReadExcelFile {

    public static void main(final String[] args) {

        final String fileName = "C:\\temp\\carreras.xls";
        final Vector<Vector<Cell>> dataHolder = ReadCSV(fileName);
        printCellDataToConsole(dataHolder);
    }

    public static Vector<Vector<Cell>> ReadCSV(final String fileName) {
        final Vector<Vector<Cell>> cellVectorHolder = new Vector<Vector<Cell>>();

        try {
            final FileInputStream myInput = new FileInputStream(fileName);
            final POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
            final HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
            final HSSFSheet mySheet = myWorkBook.getSheetAt(0);
            final Iterator<Row> rowIter = mySheet.rowIterator();
            while (rowIter.hasNext()) {
                final HSSFRow myRow = (HSSFRow) rowIter.next();
                final Iterator<Cell> cellIter = myRow.cellIterator();
                final Vector<Cell> cellStoreVector = new Vector<Cell>();
                while (cellIter.hasNext()) {
                    final HSSFCell myCell = (HSSFCell) cellIter.next();
                    cellStoreVector.addElement(myCell);
                }
                cellVectorHolder.addElement(cellStoreVector);
            }
        } catch (final Exception e) {
            e.printStackTrace();
        }
        return cellVectorHolder;
    }

    private static void printCellDataToConsole(
            final Vector<Vector<Cell>> dataHolder) {
        for (int i = 0; i < dataHolder.size(); i++) {
            final Vector<Cell> cellStoreVector = dataHolder.elementAt(i);
            for (int j = 0; j < cellStoreVector.size(); j++) {
                final HSSFCell myCell = (HSSFCell) cellStoreVector.elementAt(j);
                final String stringCellValue = myCell.toString();
                System.out.print(stringCellValue + "|");
            }
            System.out.println();
        }
    }
}

除了一个小细节之外，它按预期工作：如果找到一个空单元格，它将被跳过。预期的输出是：

1|2||4
3||7|2

然而输出是

1|2|4
3|7|2

如何遍历整个Excel文件并获得预期的行为？修正xls文件不是一个选项，因为我们需要解析大约400个excel文件。