我正在尝试更改 Apache POI 中已填充单元格的单元格类型,但我不断收到 IllegalStateException。使用 POI(-ooxml) 3.16 应该可以重现该问题。
public static void main(String[] args) throws Exception
{
//Setting up the workbook and the sheet
XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet s = wb.createSheet();
//Setting up the CTTable
XSSFTable t = s.createTable();
CTTable ctt = t.getCTTable();
ctt.setId(1);
ctt.setName("CT Table Test");
ctt.setRef("A1:B2");
CTTableColumns cttcs = ctt.addNewTableColumns();
CTTableColumn cttc1 = cttcs.addNewTableColumn();
cttc1.setId(1);
CTTableColumn cttc2 = cttcs.addNewTableColumn();
cttc2.setId(2);
//Creating the cells
XSSFCell c1 = s.createRow(0).createCell(0);
XSSFCell c2 = s.getRow(0).createCell(1);
XSSFCell c3 = s.createRow(1).createCell(0);
XSSFCell c4 = s.getRow(1).createCell(1);
//Inserting values; some numeric strings, some alphabetical strings
c1.setCellValue(/*12*/"12"); //Numbers have to be inputted as a string
c2.setCellValue(/*34*/"34"); //for the code to work
c3.setCellValue("AB");
c4.setCellValue("CD");
//With those lines, the code would also crash
//c1.setCellType(CellType.NUMERIC);
//c2.setCellType(CellType.NUMERIC);
//On write() it produces a "java.lang.IllegalStateException: Cannot get a STRING value from a NUMERIC cell"
FileOutputStream fos = new FileOutputStream("test.xlsx");
wb.write(fos);
fos.flush();
fos.close();
wb.close();
}
此外,当没有为 c1 和 c2 设置任何 CellValue 时,您实际上可以将它们的 CellType 设置为NUMERIC,然后代码会突然再次运行。它也可以在没有 CTTable 的情况下工作。
有什么想法或解决方法吗?或者这是 POI 的一个错误(因为它尝试从任何 Cell 获取字符串值,无论其 CellType 如何)?
最佳答案
您需要使用 Apache POI 3.17 beta 1 或更高版本才能正常工作(或 20170607 之后的夜间版本)
如果这样做,您还可以使您的代码变得更加简单和清晰。如图in the testNumericCellsInTable()
unit test ,您的代码可以简化为:
Workbook wb = new XSSFWorkbook();
Sheet s = wb.createSheet();
// Create some cells, some numeric, some not
Cell c1 = s.createRow(0).createCell(0);
Cell c2 = s.getRow(0).createCell(1);
Cell c3 = s.getRow(0).createCell(2);
Cell c4 = s.createRow(1).createCell(0);
Cell c5 = s.getRow(1).createCell(1);
Cell c6 = s.getRow(1).createCell(2);
c1.setCellValue(12);
c2.setCellValue(34.56);
c3.setCellValue("ABCD");
c4.setCellValue("AB");
c5.setCellValue("CD");
c6.setCellValue("EF");
// Setting up the CTTable
Table t = s.createTable();
t.setName("TableTest");
t.setDisplayName("CT_Table_Test");
t.addColumn();
t.addColumn();
t.addColumn();
t.setCellReferences(new AreaReference(
new CellReference(c1), new CellReference(c6)
));
(与您的问题代码不同,它混合了表格标题的整数、 float 和字符串,以显示各种选项)
关于java - Apache POI 无法将填充单元格格式化为数字,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44407111/