SpringCloud：Feign获取文件流

问题描述

• A服务（服务提供者）提供文件下载接口
• B服务（服务消费者）通过Feign请求拿到文件

  服务提供者A

  @GetMapping(value = "/file/{fileName}")
  public void downFile(@PathVariable("fileName") String fileName, HttpServletResponse response) {
  // 返回一个文件流
  }

服务消费者B

• Feign客户端

  @FeignClient("consume-file")
  public interface FileFeignClient {
    @GetMapping(value = "/file/{fileName}")
    Response downFile(@PathVariable("fileName") String fileName);
  }

• 响应给前端 ```java private final FileFeignClient fileFeignClient;

@GetMapping(value = “down/{fileName}”) public void down(@PathVariable(“fileName”) String fileName, HttpServletResponse response){ Response responseFile = fileFeignClient.downFile(fileName); InputStream inputStream = responseFile.body().asInputStream(); // TODO设置响应头及响应文件名称

IOUtils.copy(inputStream,response.getOutputStream());

} ```