XSSFWorkbook wb = new XSSFWorkbook();

XSSFSheet sheet = wb.createSheet("Excel");

String[] textlist = {"a","b","c"};

//设置Excel数据有效性
XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheet);
XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper
        .createExplicitListConstraint(textlist);
CellRangeAddressList addressList = null;
XSSFDataValidation validation = null;
//四个参数分别是：起始行、终止行、起始列、终止列 
addressList = new CellRangeAddressList(3, 200, 4, 4);
validation = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, addressList);
//数据有效性对象
sheet.addValidationData(validation);

String fileStr = "Table.xls";
ExcelUtil.writer(wb, fileStr);

String resPath = AliyunOssClient
        .uploadFile(AliyunOssClient.mobileQrcode + "Excel" + "/dishT.xls", new File(fileStr));
return resPath;