code: @NoAuth
      @RequestMapping(value = "/prefix", method = RequestMethod.GET)
      @ResponseBody
      public ValueVo getPrefixUrl() {
  
          ValueVo confItemVo = new ValueVo();
          confItemVo.setStatus(Constants.OK);
          confItemVo.setValue(zooConfig.getZookeeperUrlPrefix());
  
          return confItemVo;
      }
docs: 获取ZK prefix
  
  @return