HttpClient调用接口获取图片流再输出到前端展示

快来打我* 2022-12-28 04:06 150阅读 0赞

需求: 先调用别人的接口,接口返回的是图片流,再将接收到的图流写到前端

/**
         * 管点查看PBS二维码图片
         */
        @ApiOperation(value = "管点查看PBS二维码图片", notes = "管点查看PBS二维码图片", httpMethod = "GET")
        @GetMapping("/tofly-sxgk/structure/createPicNode")
        public void createPicNode(@RequestParam("pbs") String pbs, HttpServletRequest request, HttpServletResponse response) {
            String token = request.getHeader("tfToken");
            String path = String.format("/tofly-sxgk/structure/createPicNode?pbs=%s&access_token=%s",pbs,token);
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();
            HttpGet httpGet = new HttpGet(HOST + path);
            CloseableHttpResponse resp;
            try {
                resp = httpClient.execute(httpGet);// 调用服务器接口
                byte[] data = EntityUtils.toByteArray(resp.getEntity());// 将图片或者文件转化成数组的形式
                OutputStream toClient = response.getOutputStream();// 获取输出流
                toClient.write(data);// 将这个数组写入输出流中
                toClient.close();
                // 图片流转base64
    //            BASE64Encoder encoder = new BASE64Encoder();
    //            String imageBase64 ="data:image/png;base64,"+ encoder.encode(data);
    //            return Result.OK(imageBase64);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

private Result<Object> getImgBase64(String path) {
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();
            HttpGet httpGet = new HttpGet(PropertiesUtil.HOST + path);
            CloseableHttpResponse resp;
            try {
                resp = httpClient.execute(httpGet);// 调用服务器接口
                byte[] data = EntityUtils.toByteArray(resp.getEntity());// 将返回的图片或者文件转化成字节数组的形式
                BASE64Encoder encoder = new BASE64Encoder();
                String imageBase64 = "data:image/png;base64," + encoder.encodeBuffer(data).trim();
                imageBase64 = imageBase64.replaceAll("\n", "").replaceAll("\r", "").replaceAll(" ", "");//删除 \r\n
                return Result.OK(imageBase64);
            } catch (Exception e) {
                e.printStackTrace();
                return Result.ERROR(e.getMessage());
            }
        }