SpringBoot下载文件的正确解法方式

@PostMapping(value = "/project/code/download")
public void downloadCode(@RequestBody TProjectInfo pf, HttpServletResponse response) {
    // 1.生成源码文件
    // 2.压缩文件
    // 3.设置回复的一些参数
    // 4.将压缩文件写入网络流
    log.info("request param: {}", pf);
    OutputStream os = null;
        try {
            // 配置文件下载
            // 下载文件能正常显示中文
            String filename = pf.getProjectName() + System.currentTimeMillis() + ".zip";
            response.setHeader("Content-Disposition", "attachment;filename=" + filename);
            response.setHeader("Content-Type", "application/octet-stream");
            response.setContentType("application/octet-stream; charset=UTF-8");
            os = response.getOutputStream();
            projectService.generateCode(pf, os);
            log.info("Download  successfully!");
        } catch (Exception e) {
            log.error("Download  failed: {}", e.getMessage());
            throw new OptErrorException(OptStatus.FAIL.code, "文件下载失败");
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
}

@PostMapping(value = "/project/code/download")
public ResponseEntity<InputStreamResource> downloadCode(@RequestBody TProjectInfo pf) {
   log.info("request param: {}", pf);
   String filename = pf.getProjectName() + System.currentTimeMillis() + ".zip";
   byte[] bytes = projectService.generateCode(pf);
   ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
   HttpHeaders headers = new HttpHeaders();
   headers.add("Content-Disposition", String.format("attachment; filename=\"%s\"", filename));
   return ResponseEntity.ok()
           .headers(headers)
           .contentType(MediaType.parseMediaType("application/octet-stream"))
           .body(new InputStreamResource(bais));
}

@RestControllerAdvice
public class ExceptionAdvice {
    private static final Logger logger = LoggerFactory.getLogger(ExceptionAdvice.class);
    /**
     * 处理数据绑定异常
     *
     * @param bindException 数据绑定异常
     * @return 统一响应基本结果
     */
    @ExceptionHandler(value = BindException.class)
    public ResponseEntity<Result<Object>> handleValidateException(BindException bindException) {
        logger.error("数据绑定异常，{}", bindException.getMessage(), bindException);
        return of(HttpStatus.BAD_REQUEST, "数据绑定异常");
    }
    /**
     * 统一处理 405 异常
     *
     * @param exception 请求方法不支持异常
     * @return 统一响应结果
     */
    @ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
    public ResponseEntity<Result<Object>> handleMethodNotSupportedException(HttpRequestMethodNotSupportedException exception) {
        if (exception != null) {
            logger.error("Http 405, {}", exception.getMessage(), exception);
        }
        return of(HttpStatus.METHOD_NOT_ALLOWED, "方法不被支持");
    }
    private ResponseEntity<Result<Object>> of(HttpStatus status, String msg) {
        return ResponseEntity.status(status).body(Result.builder().code(OptStatus.FAIL.code).msg(msg).build());
    }
    /**
     * 统一处理自定义操作错误异常
     *
     * @param exception 操作错误异常
     * @return 统一响应结果
     */
    @ExceptionHandler(value = OptErrorException.class)
    public ResponseEntity<Result<Object>> handleOptErrorException(OptErrorException exception) {
        return of(HttpStatus.INTERNAL_SERVER_ERROR, exception.getOptMsg());
    }
    /**
     * 统一处理 服务器内部 异常
     *
     * @param e 异常
     * @return 统一响应结果
     */
    @ExceptionHandler(value = Throwable.class)
    public ResponseEntity<Result<Object>> handle500(Throwable e) {
        if (e != null) {
            logger.error("Http 500, {}", e.getMessage(), e);
        }
        return of(HttpStatus.INTERNAL_SERVER_ERROR, "服务器内部未知错误");
    }
}