java导出 excel 带下拉框

String[] strs3  = new String[]{"是", "否"};
DataValidationHelper helper = sheet1.getDataValidationHelper();//设置下拉框
CellRangeAddressList addressList = new CellRangeAddressList(1, 1000, 4,4);
DataValidationConstraint constraint = helper.createExplicitListConstraint(strs3);
DataValidation dataValidation = helper.createvalidation(constraint, addressList);
 if (dataValidation instanceof XSSFDataValidation) {
         dataValidation.setSuppressDropDownArrow(true);
          dataValidation.setShowErrorBox(true);
   } else {
          dataValidation.setSuppressDropDownArrow(false);
  }
        sheet1.addValidationData(dataValidation);