code: public EntityOperator exec() {
          /*
           * 为每个语句检查一遍参数状态
           */
          if (null != entity) {
              for (Pojo pojo : pojoList) {
                  if (null == pojo.getOperatingObject())
                      pojo.setOperatingObject(myObj);
                  if (pojo.params().isEmpty())
                      pojo.addParamsBy(pojo.getOperatingObject());
              }
              updateCount = dao._exec(pojoList.toArray(new DaoStatement[pojoList.size()]));
          }
          return this;
      }
docs: 批量执行准备好的 Dao 语句
  
  @return 自身