poi导出Excel（分行单元格颜色设置，字体设置，合并单元格，插入图片）

这是一个日报导出功能的代码;图片是用JfreeChars生成好的，话不多少 看代码

public String excelExport(HttpServletRequest request,HttpServletResponse response,CarSaledailyDTO carSaledailyDTO){//获取需要导出的报表数据
 　　　　List<List<List>> list = carSaledailyFacade.excelData(carSaledailyDTO,request);HSSFWorkbook workbook = new HSSFWorkbook();HSSFSheet sheet = workbook.createSheet("销售日报");CellRangeAddress region=new CellRangeAddress(0, 1, 0, 30);sheet.addMergedRegion(region);HSSFRow row=sheet.createRow(0);//合并列HSSFCell cell=row.createCell(0);HSSFFont f  = workbook.createFont();f.setFontName("黑体");f.setFontHeightInPoints((short) 22);//字号      f.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//加粗      
HSSFCellStyle style = workbook.createCellStyle();     style.setFont(f);      style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//左右居中style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//上下居中cell.setCellValue("日报");cell.setCellStyle(style);int r =2;for(int i = 0;i<list.size();i++){r=createRow(list.get(i), sheet,r,workbook);}    //cell.setCellStyle(style);//HSSFSheet sheet1 = workbook.createSheet("全国每日提报量和成交合同量");
        FileInputStream stream;String path = request.getSession().getServletContext().getRealPath("/");System.out.println(path);try {stream = new FileInputStream(path+"images\\pic\\line.png");byte[] bytes=new byte[(int)stream.getChannel().size()];stream.read(bytes);//读取图片到二进制数组int pictureIdx = workbook.addPicture(bytes, HSSFWorkbook.PICTURE_TYPE_JPEG);HSSFPatriarch patriarch = sheet.createDrawingPatriarch();HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0, (short)0, 33, (short)20, 60);HSSFPicture pict = patriarch.createPicture(anchor, pictureIdx);//pict.resize();//自动调节图片大小,图片位置信息可能丢失} catch (Exception e1) {// TODO Auto-generated catch block
            e1.printStackTrace();}ByteArrayOutputStream os = new ByteArrayOutputStream();try {workbook.write(os);} catch (IOException e) {e.printStackTrace();}byte[] content = os.toByteArray();InputStream is = new ByteArrayInputStream(content);try {// 设置response参数，可以打开下载页面
                response.reset();response.setContentType("application/vnd.ms-excel;charset=utf-8");//response.setHeader("Content-Disposition", "attachment;filename=" + new String(".xls").getBytes(), "iso-8859-1"));String filename = "SaleDailyReport"+carSaledailyDTO.getSearchDate()+".xls";response.setHeader("Content-Disposition", "attachment;filename= "+ URLEncoder.encode(filename, "UTF-8"));ServletOutputStream out = response.getOutputStream();BufferedInputStream bis = null;BufferedOutputStream bos = null;bis = new BufferedInputStream(is);bos = new BufferedOutputStream(out);byte[] buff = new byte[2048];int bytesRead;// Simple read/write loop.while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {bos.write(buff, 0, bytesRead);}if (bis != null)bis.close();if (bos != null)bos.close();} catch (final IOException e) {e.printStackTrace();} return "导出成功！";}

上面这个方法是koala框架里的基于spring mvc的一个controller，完全可以忽略参数*DTO;

    public Integer createRow(List<List> list,HSSFSheet sheet,int r,HSSFWorkbook workbook){for(int k = 0;k<list.size();k++){HSSFCellStyle style = workbook.createCellStyle();//设置边框样式
             style.setBorderTop(HSSFCellStyle.BORDER_THIN);style.setBorderBottom(HSSFCellStyle.BORDER_THIN);style.setBorderLeft(HSSFCellStyle.BORDER_THIN);style.setBorderRight(HSSFCellStyle.BORDER_THIN);//设置边框颜色
             style.setTopBorderColor(HSSFColor.BLACK.index);style.setBottomBorderColor(HSSFColor.BLACK.index);style.setLeftBorderColor(HSSFColor.BLACK.index);style.setRightBorderColor(HSSFColor.BLACK.index);style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);if(r==2){style.setFillForegroundColor(HSSFColor.YELLOW.index);}else if(r==7||r==15||r==23||r==31){style.setFillForegroundColor(HSSFColor.RED.index);}else if(r==9){style.setFillForegroundColor(HSSFColor.GOLD.index);}else if(r==17){style.setFillForegroundColor(HSSFColor.TAN.index);}else if(r==25){style.setFillForegroundColor(HSSFColor.SEA_GREEN.index);}else{style.setFillForegroundColor(HSSFColor.WHITE.index);}HSSFRow row = sheet.createRow(r);if(list.get(k)!=null){for(int j =0;j<list.get(k).size();j++){HSSFCell cell = row.createCell(j);cell.setCellValue((list.get(k).get(j))+"");cell.setCellStyle(style);}}r+=1;}if(r==8||r==16||r==24){HSSFRow row1 = sheet.createRow(r);for(int j =0;j<list.get(0).size();j++){HSSFCellStyle style = workbook.createCellStyle();style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);style.setFillForegroundColor(HSSFColor.GREY_50_PERCENT.index);HSSFCell cell = row1.createCell(j);cell.setCellValue("");cell.setCellStyle(style);}}r+=1;System.out.println(r);return r;}

除去Excel的标题‘日报’部分 和 图片导入；其余数据写入及单元格样式设计实在createRow方法里面实现的；

需要注意的是：

1.我们在页面导出excel文档时，都会涉及到一个导出路径选择的问题，在第一段代码中设置response参数之后就可以实现；发送到出请求时在直接在页面发送超链接请求，如：

2.使用浏览器导出excel的文件名如果是中文，可能会出现乱码问题（这里火狐浏览器比较特殊，所以为了不出现乱码，建议统一使用英文名）

response.setHeader("Content-Disposition", "attachment;filename=" + new String(".xls").getBytes(), "UTF-8"));// 火狐浏览器

response.setHeader("Content-Disposition", "attachment;filename= "+ URLEncoder.encode(filename, "UTF-8"));//其他