JavaEE_POI导出Excel, 设置导出Excel 单元格样式

最近老大提了个新需求，需要将异常数据标红，网上搜索了一下如何对POI 导出的Excel 进行样式处理，在此mark 一下

代码：（设置Excel 导出Excel 样式的颜色 ）

提示：像 cellStyle, font 等对象只要创建一次就可以了，并不需要每个单元格去创建一个对象，否则话会样式太多，Excel 会报错。

因此我想到了用 HashMap 保存样式表单

某大神代码。

			POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(
					fileName));
			HSSFWorkbook resourceFile = new HSSFWorkbook(fs);
			HSSFSheet shOrg = resourceFile.getSheet("Sheet1");
			if (shOrg == null) {
				return;
			}
			HSSFRow curRow = shOrg.getRow(1); //取XSL文件Sheet1页上第2行
			HSSFCell curCell = curRow.getCell(0); //第1列
			HSSFCellStyle cellStyle = resourceFile.createCellStyle();
			
			cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  //填充单元格
			cellStyle.setFillForegroundColor(HSSFColor.DARK_RED.index);	//填暗红色
		    Font font = resourceFile.createFont();
		    font.setFontHeightInPoints((short)24); //字体大小
		    font.setFontName("楷体");
		    font.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体
		    font.setColor(HSSFColor.GREEN.index);	//绿字
		    cellStyle.setFont(font);
		    curCell.setCellStyle(cellStyle);

		    // 另存文件
			String outputFileName = "resource1.xls";
			FileOutputStream stream;
			stream = new FileOutputStream(new File(outputFileName));
			resourceFile.write(stream);
			stream.close();

自己的代码：关于设置字体颜色部分：

//Excel导出
	@Transactional(propagation=Propagation.NOT_SUPPORTED)
	public void selectExportExcel(UserClassDailyTotal userClassDailyTotal, HttpServletResponse response) throws IOException{
	
		List<UserClassDailyTotal> list = userClassDailyTotalMapper.selectBySelectiveNoPage(userClassDailyTotal);
		//System.out.println(list.size());
		class UserDailyStatExcel extends ExcelUtilVersionTwo<UserClassDailyTotal>{

			@Override
			public void selectedTableCells(HSSFRow tableRow,
					UserClassDailyTotal t) {
				DecimalFormat floatConvert = new DecimalFormat("##0.00");		//设置截取两位小数的转换器
				SimpleDateFormat createDayConvert = new SimpleDateFormat("yyyy-MM-dd");		//日期转换器
				
				HSSFCellStyle cellStyleRedFont = this.getExcelCellStyles().get("redFont");
				
				
				tableRow.createCell(0).setCellValue(t.getUserName());
				tableRow.createCell(1).setCellValue(Double.valueOf(floatConvert.format(t.getShouldHour())));
				tableRow.createCell(2).setCellValue(Double.valueOf(floatConvert.format(t.getActualHour())));
				tableRow.createCell(3).setCellValue(Double.valueOf(floatConvert.format(t.getOvertimeHour())));
				
				HSSFCell cell4 = tableRow.createCell(4);
				if(t.getIsDelay() == 1){
					cell4.setCellStyle(cellStyleRedFont);
					cell4.setCellValue("是");
				}
				else{
					cell4.setCellValue("否");
				}
				
				HSSFCell cell5 = tableRow.createCell(5);
				if(t.getIsEarlyLeave() == 1){
					cell5.setCellStyle(cellStyleRedFont);
					cell5.setCellValue("是");
				}else{
					cell5.setCellValue("否");
				}
				
				tableRow.createCell(6).setCellValue(createDayConvert.format(t.getUserClassDay()));
			}
			
		}
		UserDailyStatExcel userDailyStatExcel = new UserDailyStatExcel();
		
		//创建Excel单元格样式
		//0.得到Excel工作本
		HSSFWorkbook excelWorkBook =  userDailyStatExcel.getExcelWorkBook();
		//1.创建单元格样式
		HSSFCellStyle cellStyleRedFont = excelWorkBook.createCellStyle();
		HSSFFont font = excelWorkBook.createFont();
		font.setColor(HSSFColor.RED.index);    //红字
		cellStyleRedFont.setFont(font);
		//2.将样式加到HashMap中
		userDailyStatExcel.addHSSFCellStyle("redFont", cellStyleRedFont);
		

		SimpleDateFormat createDayConvert = new SimpleDateFormat("yyyyMMddHHmmssSSS");		//日期转换器

		userDailyStatExcel.exportExcel(list, new String[]{"用户名","应工作时长(时)","实际工作时长(时)","加班时长(时)","迟到","早退","考勤日期"}, "个人每日考勤统计报表", createDayConvert.format(new Date())+ "个人每日考勤统计报表", response);
	}
	
    //改

}