这里仅总结 poi 4.0.0设置单元格背景颜色

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.0.0</version>
</dependency>

XSSFCellStyle style = wb.createCellStyle();
style.setFillForegroundColor(IndexedColors.YELLOW.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
cell.setCellStyle(style);

IndexedColorMap colorMap = wb.getStylesSource().getIndexedColors();
XSSFColor color = new XSSFColor(new java.awt.Color(60, 63, 65), colorMap);
style.setFillForegroundColor(color);
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);

XSSFCellStyle style = wb.createCellStyle();
XSSFColor color = new XSSFColor(Hex.decodeHex("FFF000"), null);
style.setFillForegroundColor(color);
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);