// 设置响应头
                        HttpHeaders headers = new HttpHeaders();
                        headers.add("Content-Length", String.valueOf(fileSize));
                        headers.add("Content-Disposition", "attachment; filename=" +文件名);

                        // 创建文件资源对象
                        Resource resource = new FileSystemResource(file);
                        // 返回整个文件内容
                        ResponseEntity<Resource> responseEntity =  ResponseEntity.ok()
                                .headers(headers)
                                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                                .body(new InputStreamResource(resource.getInputStream()));
                        long endTime1 = System.currentTimeMillis();
                        long duration = endTime1 - startTime;
                        System.out.println("allocateModelslices，下载文件，程序耗时：" + duration + " 毫秒");
                        System.out.println(打印当前时间_精确到毫秒.打印时间到毫秒() + "      " + sliceName + "   下载文件结束");
                        // 返回整个文件内容
                        return responseEntity;

// 创建文件对象
            File file = new File(filePath);
// 创建文件资源对象
                        Resource resource = new FileSystemResource(file);
                        // 返回整个文件内容
                        ResponseEntity<Resource> responseEntity =  ResponseEntity.ok()
                                .headers(headers)
                                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                                .body(new InputStreamResource(resource.getInputStream()));
                        long endTime1 = System.currentTimeMillis();
                        long duration = endTime1 - startTime;
                        System.out.println("allocateModelslices，下载文件，程序耗时：" + duration + " 毫秒");
                        System.out.println(打印当前时间_精确到毫秒.打印时间到毫秒() + "      " + sliceName + "   下载文件结束");
                        // 返回整个文件内容
                        return responseEntity;