code: public static EntityTable getEntityTable(Class<?> entityClass) {
          EntityTable entityTable = entityTableMap.get(entityClass);
          if (entityTable == null) {
              throw new MapperException("无法获取实体类" + entityClass.getCanonicalName() + "对应的表名!");
          }
          return entityTable;
      }
docs: 获取表对象
  
  @param entityClass
  @return