Auto size height for rows in Apache POI

Question

I am inputting values into a spreadsheet using Apache POI. These values have newlines, and I was able to use this code successfully:

CellStyle style = cell.g         


        

Answer 1

See all this link, which provides some code to manually calculate the correct height for a row, based on the column width and cell content. I've not personally tested it. Also pasted below for convenience:

// Create Font object with Font attribute (e.g. Font family, Font size, etc) for calculation
java.awt.Font currFont = new java.awt.Font(fontName, 0, fontSize);
AttributedString attrStr = new AttributedString(cellValue);
attrStr.addAttribute(TextAttribute.FONT, currFont);

// Use LineBreakMeasurer to count number of lines needed for the text
FontRenderContext frc = new FontRenderContext(null, true, true);
LineBreakMeasurer measurer = new LineBreakMeasurer(attrStr.getIterator(), frc);
int nextPos = 0;
int lineCnt = 0;
while (measurer.getPosition() < cellValue.length())
{
    nextPos = measurer.nextOffset(mergedCellWidth); // mergedCellWidth is the max width of each line
    lineCnt++;
    measurer.setPosition(nextPos);
}

Row currRow = currSht.getRow(rowNum);
currRow.setHeight((short)(currRow.getHeight() * lineCnt));

// The above solution doesn't handle the newline character, i.e. "\n", and only
// tested under horizontal merged cells.

Answer 2

cell.getRow().setHeight((short) -1);

Worked for HSSFCell in apache poi 3.9 or above

Answer 3

It works in Excel 2010. I set the limit of cell length of 50 characters

    Row row = sheet.createRow(0);
    CellStyle style = workbook.createCellStyle();
    style.setWrapText(true);
    if (data.length() > 50) {
        for (int i = 1; i <= Math.abs(data.length() / 50); i++) {
            data = data.substring(0, i * 50) + "\n" + data.substring(i * 50);
        }
        Cell cell = row.createCell(0);
        row.setRowStyle(style);
        cell.setCellStyle(style);
        cell.setCellValue(data);
        sheet.autoSizeColumn(0);
    }

Answer 4

currentRow.setHeight((short)-1)

Works for XSSFCell and Excel 2013