XSSFWorkbook实现导出excel

1.pom.xml中加入poi依赖：

　　<!-- poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.10-FINAL</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.10-FINAL</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.10-FINAL</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>

2.创建导出excel文件模板；

3.controller层实现代码:

　@PostMapping("/excelCarrierOrder")
    public ResponseEntity<Resource> excelCarrierOrder(@RequestBody Map<String,Object> params,HttpServletResponse response) throws IOException{

　　  //列表数据
         XSSFWorkbook workbook = carrierOrderService.excelCarrierOrder(params);
         ByteArrayOutputStream os = new ByteArrayOutputStream();
         workbook.write(os);
         response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
         response.setHeader("Pragma", "no-cache");
         response.setHeader("Expires", "0");
         response.setHeader("charset", "utf-8");
         // 当前日期，用于导出文件名称
         SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
         String name =sdf.format(new Date()) + ".xlsx";
         response.setHeader("Content-Disposition", "attachment;filename=\"" + URLEncoder.encode(name, "UTF-8") + "\"");
         workbook.write(response.getOutputStream());
         if (null != os) {
             os.close();
         }
         return new ResponseEntity<Resource>(null, null, HttpStatus.OK);
    }

4.service实现类实现代码：

@Override
    public XSSFWorkbook excelCarrierOrder(Map<String, Object> params) throws IOException {

　　 //模板路径
        String path = "/templates/excel/订单列表.xlsx";
        XSSFWorkbook workboot = new XSSFWorkbook(this.getClass().getResourceAsStream(path));
        //sheet页（默认sheet1页），也可通过workboot.createSheet("订单列表")创建sheet页
        XSSFSheet sheetAt = workboot.getSheetAt(0);
        //订单基本表数据
        List<CarrierOrderPojo> list = mapper.getExcelCarrierOrder(params);

　　 //开始创建行和表格并且加入数据
        //行
        XSSFRow row;
        int i = 0;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm");
        if(null != list && !list.isEmpty()) {
            for (CarrierOrderPojo dto : list) {
                //根据订单id查询车辆信息
                List<CarrierOrderTruck> truckList = truckMapper.getTruckList(dto.getId());
                //根据订单id查询装卸车费用
                List<CarrierOrderServe> serveList = serveMapper.getServeList(dto.getId());
                //根据订单id查询采购详情
                List<CarrierOrderDetail> detailList = detailMapper.getCarrierOrderDetailList(dto.getId());
                String purchaseOrderNumber = "";
                i += 1;
                //创建行
                row = sheetAt.createRow(i);
                //承运商
                if(null != dto.getCarrierName()) {
                    row.createCell(0).setCellValue(dto.getCarrierName());
                }else {
                    row.createCell(0).setCellValue("");
                }
                //物流单号
                if(null != dto.getLogisticsNumber()) {
                    row.createCell(1).setCellValue(dto.getLogisticsNumber());
                }else {
                    row.createCell(1).setCellValue("");
                }
                //采购单号
                if(null != detailList && !detailList.isEmpty()) {
                    for (CarrierOrderDetail detaildto : detailList) {
                        purchaseOrderNumber += detaildto.getPurchaseOrderNumber()+",";
                    }
                    row.createCell(2).setCellValue(purchaseOrderNumber.substring(0, purchaseOrderNumber.length()-1));
                }else {
                    row.createCell(2).setCellValue("");
                }
                //发货时间
                if(null != dto.getTakingDate()) {
                    row.createCell(3).setCellValue(sdf.format(dto.getTakingDate()));
                }else {
                    row.createCell(3).setCellValue("");
                }
                //到货时间
                if(null != dto.getDeliveryDate()) {
                    row.createCell(4).setCellValue(sdf.format(dto.getDeliveryDate()));
                }else {
                    row.createCell(4).setCellValue("");
                }
                //总体积
                if(null != dto.getTotalAllVolume()) {
                    row.createCell(5).setCellValue(dto.getTotalAllVolume()+"m³");
                }else {
                    row.createCell(5).setCellValue("");
                }
                //箱型
                if(null != truckList && !truckList.isEmpty()) {
                    for (CarrierOrderTruck truckdto : truckList) {
                        if("面包车".equals(truckdto.getTruckType())) {
                            row.createCell(6).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("金杯车".equals(truckdto.getTruckType())){
                            row.createCell(7).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("2米7平板".equals(truckdto.getTruckType())){
                            row.createCell(8).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("3米8平板".equals(truckdto.getTruckType())){
                            row.createCell(9).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("4米2平板".equals(truckdto.getTruckType())){
                            row.createCell(10).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("4米2厢车".equals(truckdto.getTruckType())){
                            row.createCell(11).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("4米2高栏".equals(truckdto.getTruckType())){
                            row.createCell(12).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("6米8厢车".equals(truckdto.getTruckType())){
                            row.createCell(13).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("6米8高栏".equals(truckdto.getTruckType())){
                            row.createCell(14).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("7米6厢车".equals(truckdto.getTruckType())){
                            row.createCell(15).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("9米6厢车".equals(truckdto.getTruckType())){
                            row.createCell(16).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("9米6高栏".equals(truckdto.getTruckType())){
                            row.createCell(17).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("12米5厢车".equals(truckdto.getTruckType())){
                            row.createCell(18).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("13米高栏".equals(truckdto.getTruckType())){
                            row.createCell(19).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("16米5厢车".equals(truckdto.getTruckType())){
                            row.createCell(20).setCellValue(truckdto.getTruckNumber()+"辆");
                        }else if("17米5厢车".equals(truckdto.getTruckType())){
                            row.createCell(21).setCellValue(truckdto.getTruckNumber()+"辆");
                        }
                    }
                }
                //送货距离
                if(null != dto.getDistance()) {
                    row.createCell(22).setCellValue(dto.getDistance()+"km");
                }else {
                    row.createCell(22).setCellValue("");
                }
                //运输费用
                if(null != dto.getFreight()) {
                    row.createCell(23).setCellValue(dto.getFreight()+"元");
                }else {
                    row.createCell(23).setCellValue("");
                }
                //装货费用,卸货费用
                if(null != serveList && !serveList.isEmpty()) {
                    for (CarrierOrderServe servedto : serveList) {
                        if("装货".equals(servedto.getServiceType())) {
                            row.createCell(24).setCellValue(servedto.getPrice()+"元");
                        }else if("卸货".equals(servedto.getServiceType())){
                            row.createCell(25).setCellValue(servedto.getPrice()+"元");
                        }
                    }
                }
                //异常费用
                if(null != dto.getOtherCost()) {
                    row.createCell(26).setCellValue(dto.getOtherCost()+"元");
                }else {
                    row.createCell(26).setCellValue("");
                }
                //合计
                if(null != dto.getTotalCost()) {
                    row.createCell(27).setCellValue(dto.getTotalCost()+"元");
                }else {
                    row.createCell(27).setCellValue("");
                }
                //备注
                if(null != dto.getCarrierRemark()) {
                    row.createCell(28).setCellValue(dto.getCarrierRemark());
                }else {
                    row.createCell(28).setCellValue("");
                }
            }
        }
        return workboot;
    }

5.项目中引入第2步创建的模板，要与Service实现类中path路径对应：

6.效果：

7.XSSFWorkbook 做导出也可以不引入模板，通过workboot.createSheet("订单列表")创建sheet页，并设定表格样式，可实现相同的效果。但是我觉得导入模板比较简单，容易上手。

　如有错误，请指出，谢谢！