sHa*_*aRi 0 java apache excel apache-poi dropdown
我想要一个包含以下条目的组合框:
{"0,5", "1", "1,5", "2", "2,5"}
我使用数据验证:
DataValidation dataValidation = null;
DataValidationConstraint constraint = null;
DataValidationHelper validationHelper = null;
validationHelper = new XSSFDataValidationHelper(sheet);
CellRangeAddressList addressList = new CellRangeAddressList(row, row, col, col);
constraint = validationHelper.createExplicitListConstraint(list);
dataValidation = validationHelper.createValidation(constraint, addressList);
dataValidation.setSuppressDropDownArrow(true);
sheet.addValidationData(dataValidation);
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该列表的结构如下:
列表 = new String[]{ "0,5", "1", "1,5", "2", "2,5" }
但生成 Excel 文件后,下拉列表中出现了其他内容。
0, 5, 1, 1, 5
这是为什么?
如果我使用点符号 (0.5, 1, 1.5),下一个问题是,当我从组合框中选择时,excel 自动将其格式化为日期,例如 1.5 -> 01。
Excel从您的描述来看,您的小数分隔符似乎是当前区域设置中的逗号。所以这个逗号 in{"0,5", "1", "1,5", "2", "2,5"}与列表约束公式中用作列表分隔符的逗号冲突。这是因为该列表约束公式将为 <formula1>"0,5,1,1,5,2,2,5"</formula1>。
使用时{"0.5", "1", "1.5", "2", "2.5"},列表约束公式将为<formula1>"0.5,1,1.5,2,2.5"</formula1>。但现在此公式中的点与您的区域设置相冲突,其中逗号作为小数分隔符,点作为日期文字中的分隔符。
这是一个众所周知的Excel问题。当前Excel版本通过使用不同类型的存储列表约束来解决这个问题:<x12ac:list>"0,5",1,"1,5",2,"2,5"</x12ac:list>而不是:<formula1>"0,5,1,1,5,2,2,5"</formula1>。但 apache poi不支持这个。
作为解决方法,我建议使用隐藏工作表来存储列表项。
例子:
import java.io.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.*;
class CreateExcelDataValidationListName {
public static void main(String[] args) throws Exception{
Workbook workbook = new XSSFWorkbook();
//create sheet for storing the list items:
Sheet sheet = workbook.createSheet("ListSheet");
sheet.createRow(0).createCell(0).setCellValue("SourceList");
int r = 1;
for (double d = 0.5; d < 3; d+=0.5) {
sheet.createRow(r++).createCell(0).setCellValue(d);
}
//unselect that sheet because we will hide it later
sheet.setSelected(false);
//create a named range for the list contraint
Name namedCell = workbook.createName();
namedCell.setNameName("SourceList");
String reference = "ListSheet!$A$2:$A$5";
namedCell.setRefersToFormula(reference);
//create the visible sheet
sheet = workbook.createSheet("Sheet1");
sheet.createRow(0).createCell(0).setCellValue("Take the ListItems from B1:");
sheet.setActiveCell(new CellAddress("B1"));
sheet.autoSizeColumn(0);
//create the data validation
DataValidationHelper dvHelper = sheet.getDataValidationHelper();
DataValidationConstraint dvConstraint = dvHelper.createFormulaListConstraint("SourceList");
CellRangeAddressList addressList = new CellRangeAddressList(0, 0, 1, 1);
DataValidation validation = dvHelper.createValidation(dvConstraint, addressList);
sheet.addValidationData(validation);
//hide the ListSheet
workbook.setSheetHidden(0, true);
//set Sheet1 active
workbook.setActiveSheet(1);
FileOutputStream out = new FileOutputStream("CreateExcelDataValidationList.xlsx");
workbook.write(out);
out.close();
workbook.close();
}
}
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