org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
Error querying database. Cause: java.lang.UnsupportedOperationException
The error may exist in file [F:\IDEA_Project\aidp\target\classes\com.hikvision.aidp.mapper\PlanInfoMapper.xml]
The error may involve com.hikvision.aidp.mapper.PlanInfoMapper.getPlan
The error occurred while handling results
SQL: select plan_id, plan_name from plan_info
Cause: java.lang.UnsupportedOperationException
解决方法
出错:
<select id="getPlan" resultType="java.util.List">
select plan_id, plan_name from plan_info
</select>
出错原因:大致意思就是设置的参数有问题。原因就在于mapper.xml的resultType代表的是List中的元素类型,而不应该是List本身,所以修改mapper.xml文件为:
修改后:
<select id="getPlan" resultType="com.hikvision.aidp.entity.PlanInfo">
select plan_id, plan_name from plan_info
</select>