springboot 读取Jar 类路径下的文件

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
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        Resource resource = new DefaultResourceLoader().getResource("classpath:download/WORKER_OVERTIME_RECORD.xlsx");

        response.setContentType("application/x-msdownload;");

        response.setHeader("Content-disposition", "attachment; filename=WORKER_OVERTIME_RECORD.xlsx");

//        response.setHeader("Content-Length", String.valueOf(resource.get));

        FileCopyUtils.copy(resource.getInputStream(),response.getOutputStream());

只能用inputstream，不能是file