Rest导出Excel文件流

Rest参数入口添加此参数 HttpServletResponse response

 Workbook workbook = new XSSFWorkbook();
            //region 兼容2003版本
            /*SecurityUser securityUser = getSecurityUserInfo();  //此行代码报错
            SysImporterItemEx sysImporterItemEx = sysImportItemImpl.selectByPrimaryKey(securityUser.getUserId(), itemId);
            if(sysImporterItemEx!=null&&sysImporterItemEx.getFileType().equals("xls"))
            {
                workbook=new HSSFWorkbook();
            }*/
            //endregion
            //region  获取mapping表，获取到列的排序
            Iterator<Map.Entry<String, List<HashMap>>> hashMapTempIterator = hashMapTemp.entrySet().iterator();
            while (hashMapTempIterator.hasNext()) {
                Map.Entry<String, List<HashMap>> entry = hashMapTempIterator.next();
                String sheetName = entry.getKey();
                // 生成一个表格
                Sheet sheet;
                sheet = workbook.createSheet(sheetName);
                List<SysItemMappingDto> itemMappingDtos = new ArrayList<SysItemMappingDto>();
                for (SysImporterItemDetailDo sysImporterItemDetailDo : detailDos) {
                    if (sysImporterItemDetailDo.getSheetName().equals(sheetName)) {
                        itemMappingDtos = itemMappingImpl.selectByDetailId(sysImporterItemDetailDo.getId());
                    }
                }
                //  数据行
                int index = -1;
                //第一行添加英文列名或标题
                Row row = sheet.createRow(++index);
                int cellIndex = -1;
                if (itemMappingDtos.size() <= 0) {
                    Cell cell = row.createCell(0);
                    cell.setCellValue("没有找到mapping表数据信息");
                }
                for (SysItemMappingDto sysItemMappingDto : itemMappingDtos) {
                    Cell cell = row.createCell(++cellIndex);
                    cell.setCellValue(sysItemMappingDto.getSourceKey());
                }
                row = sheet.createRow(++index);
                cellIndex = -1;
                //第二行中文列名或标题
                for (SysItemMappingDto sysItemMappingDto : itemMappingDtos) {
                    Cell cell = row.createCell(++cellIndex);
                    cell.setCellValue(sysItemMappingDto.getSourceName());
                }
                //第三行之后都是数据行
                List<HashMap> list = entry.getValue();
                for (HashMap hashmapTemp : list) {
                    //增加行
                    row = sheet.createRow(++index);
                    cellIndex = -1;
                    for (SysItemMappingDto sysItemMappingDto : itemMappingDtos) {
                        //添加列值
                        Cell cell = row.createCell(++cellIndex);
                        String value = (String) hashmapTemp.get(sysItemMappingDto.getSourceKey());
                        cell.setCellValue(value);
                    }

                }
            }
            //endregion
            //region 设置返回文件流
            if (response != null) {
                //response.setContentType("application/vnd.ms-excel;charset=utf-8");
                //response.setHeader("Content-Disposition", "attachment;filename="" + new String((itemId + ".xls").getBytes("gb2312"), "ISO8859-1"));
                OutputStream out = response.getOutputStream();
                workbook.write(out);
                out.close();

                response.setContentType("application/msdownload");
                response.setCharacterEncoding("utf-8");
                response.setHeader("Content-disposition", "attachment; filename="
                        + URLEncoder.encode(itemId, "UTF-8"));

            }