apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/controller/AccessKeyController.java/AccessKeyController/findByAppId
class AccessKeyController:  @GetMapping(value = "/apps/{appId}/accesskeys")
  public List<AccessKeyDTO> findByAppId(@PathVariable String appId) {
    List<AccessKey> accessKeyList = accessKeyService.findByAppId(appId);
    return BeanUtils.batchTransform(AccessKeyDTO.class, accessKeyList);
  }