java poi导出图片到excel示例代码

/** * 导出志愿者/人才数据 * @param talent_type * @return */@RequestMapping("/exportData")public void exportData(Integer talent_type, HttpServletResponse response) {  String fileId = UUID.randomUUID().toString().replace("-", "");  Map<String, Object> param = new HashMap<>() ;  param.put("talent_type", talent_type) ;  try {   List<Map<String, Object>> volunteerMapList = volunteerService.getExportData(param) ;   String rootPath = SysConfigManager.getInstance().getText("/config/sys/rootPath");   String filePath = rootPath + "/" + fileId + ".xlsx" ;   volunteerService.exportData(volunteerMapList, filePath) ;   // 下载   FileInputStream inputStream = null;   try{     //设置发送到客户端的响应内容类型     response.reset();     response.setContentLength((int) new File(filePath).length());     response.setContentType("application/octet-stream");     response.addHeader("Content-Disposition", "attachment; filename=/"" + URLEncoder.encode("文件名.xlsx", "UTF-8")+ "/"");     //读取本地图片输入流     inputStream = new FileInputStream(filePath);     // 循环取出流中的数据     byte[] b = new byte[1024];     int len;     while ((len = inputStream.read(b)) > 0)      response.getOutputStream().write(b, 0, len);   } finally{     if(inputStream != null){      inputStream.close();     }   }   logger.debug("导出志愿者/人才数据成功！");  } catch (Exception e) {   e.printStackTrace();   logger.error("导出志愿者/人才数据异常！");  }}

public void exportData(List<Map<String, Object>> volunteerMapList, String filePath) throws Exception {   String[] alias = {"头像", "名称", "个人/团体", "志愿者/人才", "性别", "生日", "手机号",       "身份证", "省份", "市", "区/县", "详细地址", "邮箱", "政治面貌", "学历", "民族",       "职业", "团队人数", "艺术特长", "介绍"};   String[] keys = {"photo", "name", "type", "talent_type", "sex", "birth_day", "mobile",       "idcard", "province", "city", "county", "address", "email", "political",       "education", "nation", "profession", "member_count", "art_spetiality", "content"};   File file = new File(filePath);   if (!file.exists()) file.createNewFile();   FileOutputStream fileOutput = new FileOutputStream(file);   XSSFWorkbook workbook = new XSSFWorkbook();   int sheetSize = volunteerMapList.size() + 50;   double sheetNo = Math.ceil(volunteerMapList.size() / sheetSize);   String photoImgPath = SysConfigManager.getInstance().getText("/config/sys/rootPath") ;   for (int index = 0; index <= sheetNo; index++) {     XSSFSheet sheet = workbook.createSheet();     workbook.setSheetName(index, "人才、志愿者" + index);     XSSFRow row = sheet.createRow(0);     sheet.setColumnWidth(0, 2048);     XSSFCell cell;     XSSFCellStyle cellStyle = workbook.createCellStyle();     XSSFFont font = workbook.createFont();     font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);     // 居中     cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);     // 加粗     cellStyle.setFont(font);     //创建标题     for (int i = 0; i < alias.length; i++) {       cell = row.createCell(i);       cell.setCellValue(alias[i]);       cell.setCellStyle(cellStyle);     }     int startNo = index * sheetSize;     int endNo = Math.min(startNo + sheetSize, volunteerMapList.size());     cellStyle = workbook.createCellStyle();     // 居中     cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);     cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);     // 写入各条记录,每条记录对应excel表中的一行     for (int i = startNo; i < endNo; i++) {       int rowNum = i + 1 - startNo ;       row = sheet.createRow(rowNum);       Map<String, Object> map = (Map<String, Object>) volunteerMapList.get(i);       for (int j = 0; j < keys.length; j++) {         cell = row.createCell(j);         String key = keys[j] ;         if (key.equals("photo")){           sheet.addMergedRegion(new CellRangeAddress(i + 1,i + 1,i + 1,i + 1)) ;           // 头像           File photoFile = new File(photoImgPath + map.get(key)) ;           if (photoFile.exists()){             BufferedImage bufferedImage = ImageIO.read(photoFile) ;             ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();             ImageIO.write(bufferedImage, "jpg", byteArrayOut);             byte[] data = byteArrayOut.toByteArray();             XSSFDrawing drawingPatriarch = sheet.createDrawingPatriarch();             XSSFClientAnchor anchor = new XSSFClientAnchor(480, 30, 700, 250, (short)0, i + 1, (short) 1, i + 2);             drawingPatriarch.createPicture(anchor, workbook.addPicture(data, XSSFWorkbook.PICTURE_TYPE_JPEG));             sheet.setColumnWidth((short)500, (short)500);             row.setHeight((short)500);           } else {             cell.setCellType(XSSFCell.CELL_TYPE_STRING);             cell.setCellValue("");           }         } else {           cell.setCellType(XSSFCell.CELL_TYPE_STRING);           Object value = map.get(key);           cell.setCellValue(value == null ? "" : value.toString());           cell.setCellStyle(cellStyle);         }       }     }     // 设置列宽    for (int i = 1; i < alias.length; i++)       sheet.autoSizeColumn(i);     // 处理中文不能自动调整列宽的问题this.setSizeColumn(sheet, alias.length);   }   fileOutput.flush();   workbook.write(fileOutput);   fileOutput.close(); }  // 自适应宽度(中文支持) private void setSizeColumn(XSSFSheet sheet, int size) {   for (int columnNum = 0; columnNum < size; columnNum++) {     int columnWidth = sheet.getColumnWidth(columnNum) / 256;     for (int rowNum = 0; rowNum <= sheet.getLastRowNum(); rowNum++) {       XSSFRow currentRow;       //当前行未被使用过       if (sheet.getRow(rowNum) == null) {         currentRow = sheet.createRow(rowNum);       } else {         currentRow = sheet.getRow(rowNum);       }       if (currentRow.getCell(columnNum) != null) {         XSSFCell currentCell = currentRow.getCell(columnNum);         if (currentCell.getCellType() == XSSFCell.CELL_TYPE_STRING) {           int length = currentCell.getStringCellValue().getBytes().length;           if (columnWidth < length) columnWidth = length;         }       }     }     columnWidth = columnWidth * 256 ;     sheet.setColumnWidth(columnNum, columnWidth >= 65280 ? 6000 : columnWidth);   } }