1.在启动类，加入@EnableAsync 注解

@SpringBootApplication
@EnableAsync
public class AsyncLearnApplication {

    public static void main(String[] args) {
        SpringApplication.run(AsyncLearnApplication.class, args);
    }

}

2.在需要使用异步的方法添加 @Async 注解

@Service
public class AsyncService {
    private final Logger logger = LoggerFactory.getLogger(AsyncService.class);

    @Async("asyncExecutor")
    public void importOrderInfo(MultipartFile file) throws Exception {
        logger.info("数据处理中...");
        ImportParams params = new ImportParams();
        params.setHeadRows(1);
        try {
            List<OrderExcelDTO> list = ExcelImportUtil.importExcel(file.getInputStream(), OrderExcelDTO.class, params);
            logger.info("list size:[{}]",list.size());
            logger.info("数据处理完成");
        }catch (Exception e){
            logger.error("文件转换异常[{}]",e);
        }
    }
}