使用 MS-Excel 打开.xlsx时遇到问题，其中 APACHE POI XSSF数据验证助手用于数字和日期验证

Question

我使用java中的Apache POI 3.17、XSSFDataValidationHelper为.xlsx文件中的日期和数值等数据添加验证，但每当我使用MS Excel打开该文件时，它都会显示

我们发现中的某些内容有问题。是否希望我们尽量恢复该文件？如果您信任此工作簿的来源，请单击“是”

当我检查这个错误时，我得到，当文件部分损坏或完全损坏时会发生这种情况。

这个问题只出现在那些。xlsx文件，其中我使用了任何类型的数据验证，就像我上面提到的，但如果我打开它，这个问题就不会发生。linux环境下的xlsx文件。

P.S：我正在关闭工作簿和文件输出流在最后，在工作簿下至少创建了一个工作表（显然）

PFB数据验证的代码段：-

`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

不能使用< code>Double。MIN_VALUE和< code>Double。< code>Excel数据验证中的MAX_VALUE。< code>Excel对数字单元格值有更严格的限制。您不能在< code>Excel单元格中存储< code > 1.7976931348623157 e308 ，也不能存储< code>4.9E-324。在< code>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< code >-9.999999999999 e307 ，最大数字是< code > 9.9999999999 e307 。所以你必须用这些数字来限制可能数字的范围。

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

但是我怀疑目标是只允许数值。这也可以使用具有以下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();

 }
}