代码-mysql中字段为text类型使用mybatis的Criteria查询无法进行封装

 tb_item_param CREATE TABLE `tb_item_param` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `item_cat_id` bigint(20) DEFAULT NULL COMMENT '商品类目ID', `param_data` text COMMENT '参数数据，格式为json格式', `created` datetime DEFAULT NULL, `updated` datetime DEFAULT NULL, PRIMARY KEY (`id`), KEY `item_cat_id` (`item_cat_id`) ) ENGINE=InnoDB AUTO_INCREMENT=28 DEFAULT CHARSET=utf8 COMMENT='商品规则参数' 

 public void itemParamList(int page, int rows) { EUIDataGridResult result = new EUIDataGridResult(); TbItemParamExample example = new TbItemParamExample(); Criteria criteria = example.createCriteria(); criteria.andIdEqualTo((long)1); //PageHelper.startPage(page, rows); List list = itemParamMapper.selectByExample(example); TbItemParam tbItemParam = list.get(0); //TbItemParam itemParam = itemParamMapper.selectByPrimaryKey((long)1); System.out.println(tbItemParam.getParamData());