如何在apache poi中使用2行单元格引用

XSSFWorkbook workbook = new XSSFWorkbook();

XSSFSheet sheet = workbook.createSheet("Sheet1");

XSSFRow row1 = sheet.createRow(0);
XSSFCell cell1 = row1.createCell(0);
XSSFCell cell2 = row1.createCell(1);

XSSFRow row2 = sheet.createRow(1);
XSSFCell cell3 = row2.createCell(0);
XSSFCell cell4 = row2.createCell(1);

cell1.setCellValue("Value 1");
cell2.setCellValue("Value 2");
cell3.setCellValue("Value 3");
cell4.setCellValue("Value 4");

CellReference ref1 = new CellReference("A1");
CellReference ref2 = new CellReference("B2");

XSSFRow referencedRow1 = sheet.getRow(ref1.getRow());
XSSFCell referencedCell1 = referencedRow1.getCell(ref1.getCol());

XSSFRow referencedRow2 = sheet.getRow(ref2.getRow());
XSSFCell referencedCell2 = referencedRow2.getCell(ref2.getCol());

String value1 = referencedCell1.getStringCellValue();
String value2 = referencedCell2.getStringCellValue();