Workbook wb = new Workbook("C:/a.xlsx");
ImageOrPrintOptions o = new ImageOrPrintOptions();
o.setImageFormat(ImageFormat.getPng());
SheetRender render = new SheetRender(wb.getWorksheets().get(0), o);
render.toImage(0, "x0.png");
render.toImage(1, "x1.png");
For cell "C" in x0.png has no bottom border
For cell "C" in x1.png has top border
I think x1.png "C" should not has top border