调用微信接口获取带参二维码生成图片打不开，图片损坏 - WXOPEN Club

 String access_token = this.getAccessTokenString();

//封装参数
 Map<String, Object> parMap = new HashMap<String, Object>();
 parMap.put("medicalOrgCode",medicalOrgCode);
 parMap.put("departmentCode",departmentCode);
 Gson gson = new Gson();
 String scene = gson.toJson(parMap);//带参
 if(width==null||width==0){
     width = 430;//默认
 }

 String url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token="+access_token;
 Map<String,Object> param = new HashMap<>();
 param.put("scene", parMap);
 param.put("page", "pages/index/index");
 param.put("width", width);
 param.put("auto_color", false);
 Map<String,Object> line_color1 = new HashMap<>();
 line_color1.put("r", 0);
 line_color1.put("g", 0);
 line_color1.put("b", 0);
 param.put("line_color", line_color);
 System.out.println("调用生成微信URL接口传参:" + param);
 MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
 HttpEntity requestEntity = new HttpEntity(param, headers);
 RestTemplate rest = new RestTemplate();
 ResponseEntity<byte[]> entity = rest.exchange(url, HttpMethod.POST, requestEntity, byte[].class, new Object[0]);
 System.out.println("调用小程序生成微信永久小程序码URL接口返回结果:" + entity.getBody());
 byte[] result = entity.getBody();
 System.out.println(Base64.encodeBase64String(result));
 InputStream instreams = new ByteArrayInputStream(result);

 String uploadSysUrl = "F:\\upload"+"/";
 saveToImgByInputStream(instreams, uploadSysUrl, id+".jpg"); //保存图片到本地（代码没问题）

 String resUrl = ossService.uploadObject(instreams, "wxaqrcode/",
         id, FileUtils.getFileExt(".jpg"));  //上传到阿里云   （代码没问题）