如何用java在excel中逐个设置不同颜色的单元格

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.2</version>
</dependency>

Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("Sheet1");

CellStyle styleRed = workbook.createCellStyle();
styleRed.setFillForegroundColor(IndexedColors.RED.getIndex());
styleRed.setFillPattern(FillPatternType.SOLID_FOREGROUND);

CellStyle styleGreen = workbook.createCellStyle();
styleGreen.setFillForegroundColor(IndexedColors.GREEN.getIndex());
styleGreen.setFillPattern(FillPatternType.SOLID_FOREGROUND);

Row row = sheet.createRow(0);
Cell cell1 = row.createCell(0);
cell1.setCellValue("Red Cell");
cell1.setCellStyle(styleRed);

Cell cell2 = row.createCell(1);
cell2.setCellValue("Green Cell");
cell2.setCellStyle(styleGreen);

FileOutputStream fileOut = new FileOutputStream("path/to/excel.xlsx");
workbook.write(fileOut);
fileOut.close();
workbook.close();