code: public static Map<String, Object> getParamMap(final Collection<Condition> conditions) {
      final Map<String, Object> params = new HashMap<String, Object>();
      for (final Condition con : conditions) {
        params.putAll(getParamMap(con));
      }
      return params;
    }
docs: 获得条件的绑定参数映射
  
  @param conditions