mybatis查询参数报jdbcType属性为空

查询报异常：

nested exception is org.apache.ibatis.exceptions.PersistenceException: /n### Error querying database. Cause: java.lang.IllegalStateException: Type handler was null on parameter mapping for property ‘unitFitmentList’. It was either not specified and/or could not be found for the javaType (java.util.List) : jdbcType (null) combination./n### Cause: java.lang.IllegalStateException: Type handler was null on parameter mapping for property ‘unitFitmentList’. It was either not specified and/or could not be found for the javaType (java.util.List) : jdbcType (null) combination.

解决：

在dao层给参数加上@Param,正常查询

原因：

具体原因不清楚，估计是未加@Param，会有参数类型丢失的风险