java - 使用 MS-Excel 打开 .xlsx 时遇到问题，其中 APACHE POI XSSFDataValidationHelper 用于数字和日期验证

Question

我在 java 中使用 Apache POI 3.17、XSSFDataValidationHelper 来添加对 .xlsx 文件中日期和数值等数据的验证，但每当我使用 MS-Excel 打开文件时，它都会显示

“我们发现 .您希望我们尽可能尝试恢复文件吗？如果您信任此工作簿的来源，请单击"is"”

当我检查此错误时，我发现，当文件部分损坏或完全损坏时会发生这种情况。

此问题仅出现在那些我使用了上面提到的任何类型的数据验证的 .xlsx 文件上，但如果我在 Linux 环境中打开该 .xlsx 文件，也不会发生此问题。

P.S:我最后关闭工作簿和 FileOutputStream，在工作簿下创建了至少一张工作表(显然)

PFB 用于数据验证的代码片段:-

`XSSFDataValidationHelper dataValidationHelper = new XSSFDataValidationHelper(sheet);

        XSSFDataValidationConstraint numberValidationConstraint =
                (XSSFDataValidationConstraint)
                        dataValidationHelper.createNumericConstraint(
                                XSSFDataValidationConstraint.ValidationType.DECIMAL,
                                XSSFDataValidationConstraint.OperatorType.BETWEEN,
                                String.valueOf(Double.MIN_VALUE),
                                String.valueOf(Double.MAX_VALUE)
                        );

        CellRangeAddressList addressList = new CellRangeAddressList(
                2, 2000, columnCounter, columnCounter);
        XSSFDataValidation numberValidation =(XSSFDataValidation)dataValidationHelper.createValidation(
                numberValidationConstraint, addressList);
        numberValidation.setSuppressDropDownArrow(false);
        numberValidation.setShowErrorBox(true);
        numberValidation.createErrorBox("Invalid data","Only numbers are allowed");
        sheet.addValidationData(numberValidation);`

Answer 1

您不能在 Excel 数据验证中使用 Double.MIN_VALUE 和 Double.MAX_VALUE。 Excel 对数字单元格值有更严格的限制。您无法在 Excel 单元格中存储 1.7976931348623157E308，也不能存储 4.9E-324。在 Excel 单元格中只能存储 15 位有效数字。因此，您可以存储的最小数字是-9.99999999999999E307，您可以存储的最大数字是9.99999999999999E307。因此，您必须使用该数字来限制可能的数字范围。

DataValidationConstraint numberValidationConstraint = dataValidationHelper.createNumericConstraint(
 DataValidationConstraint.ValidationType.DECIMAL,
 DataValidationConstraint.OperatorType.BETWEEN,
 //String.valueOf(Double.MIN_VALUE),
 //String.valueOf(Double.MAX_VALUE)
 "-9.99999999999999E307",
 "9.99999999999999E307"
);

但我怀疑目标是只允许数值。这也可以使用具有公式的自定义公式约束来实现

=ISNUMBER(OFFSET($A$1,ROW()-1,COLUMN()-1))

完整示例:

import java.io.FileOutputStream;

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.util.CellRangeAddressList;

class CreateExcelDataValidation {

 public static void main(String[] args) throws Exception {

  //Workbook workbook = new HSSFWorkbook();
  Workbook workbook = new XSSFWorkbook();

  Sheet sheet = workbook.createSheet();

  int columnCounter = 0;
  int fromRow = 2;
  int toRow = 2000;

  DataValidationHelper dataValidationHelper = sheet.getDataValidationHelper();

/*
  DataValidationConstraint numberValidationConstraint = dataValidationHelper.createNumericConstraint(
   DataValidationConstraint.ValidationType.DECIMAL,
   DataValidationConstraint.OperatorType.BETWEEN,
   //String.valueOf(Double.MIN_VALUE),
   //String.valueOf(Double.MAX_VALUE)
   "-9.99999999999999E307",
   "9.99999999999999E307"
  );
*/

  DataValidationConstraint numberValidationConstraint = dataValidationHelper.createCustomConstraint(
   "ISNUMBER(OFFSET($A$1,ROW()-1,COLUMN()-1))"
  );

  CellRangeAddressList addressList = new CellRangeAddressList(fromRow, toRow, columnCounter, columnCounter);
  DataValidation numberValidation = dataValidationHelper.createValidation(numberValidationConstraint, addressList);
  numberValidation.setShowErrorBox(true);
  numberValidation.createErrorBox("Invalid data","Only numbers are allowed");
  sheet.addValidationData(numberValidation);

  FileOutputStream out = null;
  if (workbook instanceof HSSFWorkbook) {
   out = new FileOutputStream("CreateExcelDataValidation.xls");
  } else if (workbook instanceof XSSFWorkbook) {
   out = new FileOutputStream("CreateExcelDataValidation.xlsx");
  }
  workbook.write(out);
  workbook.close();
  out.close();

 }
}