code: private void loadMapRelation(Map<?, ?> obj, String path) {
          for(Object key : obj.keySet()){
              Object val = obj.get(key);
              if(val instanceof String){
                  relation.put(path + space(path) + key.toString(), Lang.list(val.toString()));
                  continue;
              }
              loadRelation(obj.get(key), path + space(path) + key.toString());
          }
      }
docs: 解析MAP配置信息
  @param obj
  @param path