I am trying to update an existing Excel file. But the updates are not
being saved.
When I append a new cell on the end of an existing row, and then save
the workbook to a new file, the new file is identical to the old file.
The cell gets created. I can see it in the debugger. I can get it to
print a value. But when I write out the workbook out to a file, the new
cell disappears.
I've been following the how-to guide on the site, and I traced down the
HSSF.java code and reviewed the "main" method in there. It looks like I
am following the same code pattern. According to the HSSF code, it
doesn't look like I need to remove anything, if I am just adding new
objects, such as an append.
This is how I'm writing out the file:
POIFSFileSystem fs = readExcelFile(file);
FileOutputStream os = new FileOutputStream(file + "new.xls");
fs.writeFilesystem(os);
os.close();
Here is the append code:
private void appendRateColumn(HSSFRow row) {
int rowNumber = row.getRowNum();
HSSFCell rateCell = row.createCell(RateColumn,
HSSFCell.CELL_TYPE_NUMERIC);
HSSFCell cellOfHoursWorked = row.getCell(SumOfQuantityColumn);
HSSFCell cellOfAmount = row.getCell(SumOfAmountColumn);
double hoursWorked = cellOfHoursWorked.getNumericCellValue();
double amount = cellOfAmount.getNumericCellValue();
rateCell.setCellValue(amount/hoursWorked);
System.out.println("CELL [" + getCellStringValue(rateCell) + "]");
} // method appendRateColumn(HSSFRow
--
A. Rick Anderson
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