Question

I’m using Apache POI to export data to a .xlsx file and I want to style some of the rows and cells contained in the file.

I’m using XSSF since the file is going to be read in Excel 2007+.

Basically, my problem is that I’m trying to set a row style like in the following example, which sets a black foreground color for the entire row at index 0. It works fine, but whenever I create a new cell, the newly created cell has no style, as if it’s overriding the row style I specified.

Here’s a code snippet to demonstrate what I’m doing:

XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet sheet = wb.createSheet("mySheet");
XSSFRow row = sheet.createRow(0);

XSSFCellStyle myStyle = wb.createCellStyle();           

myStyle.setFillForegroundColor(new XSSFColor(new Color(255, 255, 255)));
myStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);

row.setRowStyle(myStyle); //This works, the whole row is now black

row.createCell(0); // This cell doesn't have a style, the rest of the line stays stylized
row.getCell(0).setCellValue("Test");

I also tried *row.createCell(0, Cell.CELL_TYPE_STRING);*, but it didn’t change anything.

What is the correct way of accomplishing what I want to do? I wanted to do it this way so I didn’t have to set each cell’s style after creating it since all cells on the same row have the same style.

Answer 1

Set the style into newly created cell as well e.g. below:

    XSSFCell newCell = row.createCell(0);
    newCell.setCellStyle(myStyle);