Java调用接口获得图片输入流InputStream并返回给前端

效果：

代码：

export const getPhotoById = params => get(`${base}/weda/myLecture/poster/template/getPhotoById?id=${params.id}&isPreview=${params.isPreview}`,{}); // 获取原始的大图

后端

    @Override
    public void getPhotoById(PosterTemplate dto, HttpServletResponse response) throws Exception {
        /省略
 
        InputStream download = minioUtil.download("mpbucket", "sjs/wdjz/hbgl" + SLASH_SUFFIX + preview);
        writeFile(response,download);
    }

  /**
     *  将输入流输出到页面
     */
    public static void writeFile(HttpServletResponse resp, InputStream inputStream) {
        OutputStream out = null;
        try {
            out = resp.getOutputStream();
            int len = 0;
            byte[] b = new byte[1024];
            while ((len = inputStream.read(b)) != -1) {
                out.write(b, 0, len);
            }
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }