项目数据导出成Excel文件

项目数据导出成Excel文件

模板准备:

数据格式模板如:abc.xlsx

页面处理:

绑定事件:

<el-button @click="exportExcel">导出Excel</el-button>运营数据统计

发送请求：

不能用ajax,因为接受的是文件输出流,ajax接受的是json

methods:{exportExcel(){        
window.location.href = '/report/exportBusinessReport.do';
}}

后端代码实现:

1.查询出数据

2.基于模板创建excel,填入数据

3.使用输出流进行表格下载

@RequestMapping("/exportBusinessReport")
    public  Result exportBusinessReport(HttpServletRequest request, HttpServletResponse response){
        try{
            Map<String,Object> result = reportService.getBusinessReportData();
            //1.取出返回结果数据，准备将报表数据写入到Excel文件中
            String reportDate = (String) result.get("reportDate");
            Integer todayNewMember = (Integer) result.get("todayNewMember");
            Integer totalMember = (Integer) result.get("totalMember");
            Integer thisWeekNewMember = (Integer) result.get("thisWeekNewMember");
            Integer thisMonthNewMember = (Integer) result.get("thisMonthNewMember");
            Integer todayOrderNumber = (Integer) result.get("todayOrderNumber");
            Integer thisWeekOrderNumber = (Integer) result.get("thisWeekOrderNumber");
            Integer thisMonthOrderNumber = (Integer) result.get("thisMonthOrderNumber");
            Integer todayVisitsNumber = (Integer) result.get("todayVisitsNumber");
            Integer thisWeekVisitsNumber = (Integer) result.get("thisWeekVisitsNumber");
            Integer thisMonthVisitsNumber = (Integer) result.get("thisMonthVisitsNumber");
            List<Map> hotSetmeal = (List<Map>) result.get("hotSetmeal");
            //获取模板文件路径（绝对路径+自动分隔符+文件名）
            String filePath=request.getSession().getServletContext().getRealPath("template")+ File.separator+"report_template.xlsx";
            //2.基于提供的Excel模板文件在内存中创建一个Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(new FileInputStream(new File(filePath)));
            //读取第一个工作表
            XSSFSheet sheet = excel.getSheetAt(0);

            XSSFRow row = sheet.getRow(2);
            row.getCell(5).setCellValue(reportDate);//日期

            row = sheet.getRow(4);
            row.getCell(5).setCellValue(todayNewMember);//新增会员数（本日）
            row.getCell(7).setCellValue(totalMember);//总会员数

            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增会员数
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增会员数

            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日预约数
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到诊数

            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周预约数
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到诊数

            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月预约数
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到诊数
            int rowNum = 12;
            for(Map map : hotSetmeal){//热门套餐
                String name = (String) map.get("name");
                Long setmeal_count = (Long) map.get("setmeal_count");
                BigDecimal proportion = (BigDecimal) map.get("proportion");
                row = sheet.getRow(rowNum ++);
                row.getCell(4).setCellValue(name);//套餐名称
                row.getCell(5).setCellValue(setmeal_count);//预约数量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }
            //3.使用输出流进行表格下载
            ServletOutputStream out = response.getOutputStream();
            //获取文件的mimeType
            String mimeType = request.getSession().getServletContext().getMimeType("report_template.xlsx");
            response.setContentType(mimeType);//设置响应数据格式
            response.setHeader("content-Disposition", "attachment;filename=report.xlsx");//以附件形式进行下载
            excel.write(out);
            out.flush();
            out.close();
            excel.close();
            return null;
        }catch (Exception e){
            return new Result(false,MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }

业务层,持久层查询语句:

略…