項目資料導出成Excel檔案

模闆準備:

資料格式模闆如:abc.xlsx

頁面處理:

綁定事件:

<el-button @click="exportExcel">導出Excel</el-button>營運資料統計
           

發送請求：

不能用ajax,因為接受的是檔案輸出流,ajax接受的是json

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

後端代碼實作:

1.查詢出資料

2.基于模闆建立excel,填入資料

3.使用輸出流進行表格下載下傳

@RequestMapping("/exportBusinessReport")
    public  Result exportBusinessReport(HttpServletRequest request, HttpServletResponse response){
        try{
            Map<String,Object> result = reportService.getBusinessReportData();
            //1.取出傳回結果資料，準備将報表資料寫入到Excel檔案中
            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");
            //擷取模闆檔案路徑（絕對路徑+自動分隔符+檔案名）
            String filePath=request.getSession().getServletContext().getRealPath("template")+ File.separator+"report_template.xlsx";
            //2.基于提供的Excel模闆檔案在記憶體中建立一個Excel表格對象
            XSSFWorkbook excel = new XSSFWorkbook(new FileInputStream(new File(filePath)));
            //讀取第一個工作表
            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);//新增會員數（本日）
            row.getCell(7).setCellValue(totalMember);//總會員數

            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增會員數
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增會員數

            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日預約數
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到診數

            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周預約數
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到診數

            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月預約數
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到診數
            int rowNum = 12;
            for(Map map : hotSetmeal){//熱門套餐
                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);//套餐名稱
                row.getCell(5).setCellValue(setmeal_count);//預約數量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }
            //3.使用輸出流進行表格下載下傳
            ServletOutputStream out = response.getOutputStream();
            //擷取檔案的mimeType
            String mimeType = request.getSession().getServletContext().getMimeType("report_template.xlsx");
            response.setContentType(mimeType);//設定響應資料格式
            response.setHeader("content-Disposition", "attachment;filename=report.xlsx");//以附件形式進行下載下傳
            excel.write(out);
            out.flush();
            out.close();
            excel.close();
            return null;
        }catch (Exception e){
            return new Result(false,MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }
           

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