1.先引入hutool的相关依赖

 <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.4</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.2</version>
        </dependency>

2.导出

创建一个Controller进行测试

    @GetMapping(path = "/export")
    public void export(HttpServletResponse response,OrderPageRequest orderPageRequest)throws IOException { {
            // 查询导出订单数据
            List<OrdereExportView> ordereList = getOrdereList(orderPageRequest);
            if (CollectionUtils.isEmpty(ordereList)) {
                throw new BusinessException("暂无数据！");
            }
            //在内存操作，写到浏览器
            ExcelWriter writer = ExcelUtil.getWriter(true);

            //自定义标题别名
            writer.addHeaderAlias("orderCode", "订单编码");
            writer.addHeaderAlias("addressName", "送达方名称");
            writer.addHeaderAlias("amount", "订单金额");
            writer.addHeaderAlias("orderStatusDesc", "订单状态");
            writer.addHeaderAlias("createTime", "创建时间");
            writer.addHeaderAlias("submitTime", "提交时间");
            writer.addHeaderAlias("createTime", "创建时间");
    
            //只保留别名的数据
            writer.setOnlyAlias(true);
            // 默认配置
            writer.write(ordereList, true);
            // 设置content—type
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset:utf-8");

            // 设置标题
            String fileName = URLEncoder.encode("订单导出", "UTF-8");
            //Content-disposition是MIME协议的扩展，MIME协议指示MIME用户代理如何显示附加的文件。
            response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
            ServletOutputStream outputStream = response.getOutputStream();

            //将Writer刷新到OutPut
            writer.flush(outputStream, true);
            outputStream.close();
            writer.close();
      
    }