一、依赖添加

操作手册：Hutool — 🍬A set of tools that keep Java sweet. 

        <!--hutool工具包--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.7.20</version></dependency><!--Apache POI,用于读写excel文档--><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency>

二、实现接口

  excel导入

    /*** 上传excel* @param file 请求头设置为form-data，参数名需一致（例如：file）* @throws Exception*/@PostMapping("/import")public void importExcel(MultipartFile file) throws Exception {// 获取数据流InputStream inputStream = file.getInputStream();ExcelReader reader = ExcelUtil.getReader(inputStream);// 读取数据List<Login> list = reader.readAll(Login.class);System.out.println(list);}

 excel导出

    /*** 导出excel* @param response* @throws Exception*/@GetMapping("/export")public void exportExcel(HttpServletResponse response) throws Exception {List<Login> list = loginService.list();// 从内存操作，直接写出到浏览器ExcelWriter writer = ExcelUtil.getWriter(true);// 自定义列名writer.addHeaderAlias("id", "账号");writer.addHeaderAlias("name", "用户名");writer.addHeaderAlias("job", "职业");writer.addHeaderAlias("address", "地址");// 写出到excel对象writer.write(list, true);// 设置浏览器响应的格式response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");String fileName = URLEncoder.encode("用户信息表", "UTF-8");response.setHeader( "Content-Disposition", "attachment;filename=" + fileName + ".xlsx");// 执行导出，并释放ServletOutputStream out = response.getOutputStream();writer.flush(out, true);out.close();writer.close();}