在特殊CELL其他第1行和第1列中使用POI创建XL下拉列表

Question

我正在尝试使用以下代码使用POI在Excel中创建下拉列表。它会在A1单元格中产生下拉。但我想在任何细胞中创造。下面代码中的下拉创建与特定单元格无关。

        DataValidation dataValidation = null;
        DataValidationConstraint constraint = null;
        DataValidationHelper validationHelper = null;


        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet1 = (XSSFSheet) wb.createSheet("sheet1");

        validationHelper = new XSSFDataValidationHelper(sheet1);
        CellRangeAddressList addressList = new CellRangeAddressList(0, 7, 0,0);
        constraint = validationHelper.createExplicitListConstraint(new String[]{"SELECT", "10", "20", "30"});
        dataValidation = validationHelper.createValidation(constraint, addressList);
        dataValidation.setSuppressDropDownArrow(true);
        sheet1.addValidationData(dataValidation);


        FileOutputStream fileOut = new FileOutputStream("c:/drop-down.xlsx");
        wb.write(fileOut);
        fileOut.close();

有人可以指出我的步骤。