Append new row in excel file via java apache POI

Question

I have an existing xlsx file, on row 1 I have my headlines, what I need to is add new row at 2 and of course shift everything else down, and then add my data to this row. Can you please help me with this?

static void Append() throws EncryptedDocumentException, InvalidFormatException, IOException
{
    InputStream inp = new FileInputStream("C:/workbook.xlsx");

    Workbook wb = WorkbookFactory.create(inp);
    Sheet sheet = wb.getSheetAt(0);

    Row row = sheet.createRow((short) 2);
    sheet.shiftRows(1, sheet.getLastRowNum()+1, 1, true,true);
    row.createCell(0).setCellValue("A");
    row.createCell(1).setCellValue("B");
    row.createCell(2).setCellValue("This is a string");
    row.createCell(3).setCellValue(true);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("C:/workbook.xlsx");
    wb.write(fileOut);
    fileOut.close();
}

Answer 1

Indeed the method shiftRows is a good candidate for this need, you simply need to better set the parameters, like this:

...
// Shift of one row all the rows starting from the 3th row
sheet.shiftRows(2, sheet.getLastRowNum(), 1, true, true);
// Create my new 3th row
Row row = sheet.createRow(2);
...