POI 設置單元格樣式

public static void writeExcel(List<ServAuthBean> data_list){
		//新建工作簿
		HSSFWorkbook workbook = new HSSFWorkbook();
		
		//自定義顏色
		HSSFPalette palette = workbook.getCustomPalette();
		//十六進制顏色RGB碼
		String color = "99CC00";
		//將十六進制碼轉為十進制數字
		int r = Integer.parseInt(color.substring(0, 2), 16);
		int g = Integer.parseInt(color.substring(2, 4), 16);
		int b = Integer.parseInt(color.substring(4, 6), 16);
		//自定義索引顏色
		palette.setColorAtIndex((short)9, (byte)r, (byte)g, (byte)b);
		
		//創建單元格樣式
		HSSFCellStyle cell_style = workbook.createCellStyle();
		//此處將HSSFCellStyle.SOLID_FOREGROUND改為FillPatternType.SOLID_FOREGROUND,網上搜索資料一堆錯誤用法
		cell_style.setFillPattern(FillPatternType.SOLID_FOREGROUND);  
		cell_style.setAlignment(HorizontalAlignment.CENTER);
		cell_style.setFillForegroundColor((short)9);
		//以下為API自帶的顏色設置
//		cell_style.setFillForegroundColor(IndexedColors.BRIGHT_GREEN1.index);    
		
		//自定義字體顏色, 同單元格樣式
		HSSFFont font = workbook.createFont();
		font.setFontHeightInPoints((short) 9);
		//字體設置為Arial
		font.setFontName(HSSFFont.FONT_ARIAL);   
		//設置索引 10 為白色
		palette.setColorAtIndex((short)10, (byte) 255, (byte) 255, (byte) 255);
		//將字體顏色設為白色
		font.setColor((short)9);
		cell_style.setFont(font);
		
		//創建sheet表格
		HSSFSheet sheet = workbook.createSheet("ServAuth");
		//設置單元格列寬
		sheet.setColumnWidth(1, 50*100);
		sheet.setColumnWidth(2, 50*100);
		sheet.setColumnWidth(3, 50*100);
		
		// 創建報文頭第一行
		HSSFRow row_0 = sheet.createRow(0);
		HSSFCell cell0 = row_0.createCell(0);
		// 數據域個數
		cell0.setCellValue("數據域個數");
		cell0.setCellStyle(cell_style);

		// 第二行賦值操作
		HSSFRow row_1 = sheet.createRow(1);
		row_1.createCell(0).setCellValue(10);
		
		// 第三行賦值
		HSSFRow row_2 = sheet.createRow(2);
		HSSFCell cell_2_0 = row_2.createCell(0);
		cell_2_0.setCellValue("服務編號");
		cell_2_0.setCellStyle(cell_style);
		HSSFCell cell_2_1 = row_2.createCell(1);
		cell_2_1.setCellValue("服務請求方代碼");
		cell_2_1.setCellStyle(cell_style);
		HSSFCell cell_2_2 = row_2.createCell(2);
		cell_2_2.setCellValue("授權標志");
		cell_2_2.setCellStyle(cell_style);
		
		// 第四行往后用查詢數據填充
		int row_num = 3;
		for (ServAuthBean data_bean : data_list) {
			HSSFRow row = sheet.createRow(row_num);
			row.createCell(0).setCellValue(data_bean.getServ_id());
			row.createCell(1).setCellValue(data_bean.getApps_sys_id());
			row.createCell(2).setCellValue(data_bean.getStatus());
			row_num++;
		}
		
		//文件名
		String file_name = "授權.xls";
		
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(file_name);
			try {
				workbook.write(fos);
			} catch (IOException e) {
				e.printStackTrace();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			try {
				if(workbook != null) {
					workbook.close();
				}
				if(fos != null) {
					fos.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

　最近項目遇到用POI導出文件，碰到關於excel單元格樣式的問題，謹記錄一波！