private HSSFCellStyle createMatrixCellStyle( HSSFWorkbook workbook, HSSFCellStyle matrixHeaderTemplateCellStyle, boolean top, boolean right, boolean bottom, boolean left) { HSSFCellStyle cellStyle = POIUtils.copyCellStyle(workbook, matrixHeaderTemplateCellStyle); if (top) { cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); } if (right) { cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); } if (bottom) { cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); } if (left) { cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); } return cellStyle; }