POI設置Excel行或單元格的背景色

POI：set background color for a row or a cell.

use setFillForegroundColor and setFillPattern at the same.

Note that not setFillBackgroundColor.

XSSFCellStyle newstyle = wb.createCellStyle();
newstyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex());
newstyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);

 

POI：set the last sheet selected, use setActiveSheet method.

XSSFWorkbook wb = new XSSFWorkbook(inputStream);
...
wb.setActiveSheet(newExcelCreat.getNumberOfSheets() - 1);