关于mybaits单入参报错问题

当传入数据只有一个时mybatis中判断会出现There is no getter for property named 'subjectId' in 'class java.lang.Integer

用"_parameter"代替当前参数
正确：

 
select subjectId,
subjectName 
from ts_subject 
where subjectParentId= 0 

 and subjectId = #{_parameter,jdbcType=INTEGER} 

错误：

 
select subjectId,
subjectName 
from ts_subject 
where subjectParentId= 0 
 
and subjectId = #{subjectId,jdbcType=INTEGER} 

这时候就会出现异常.
There is no getter for property named 'subjectId' in 'class java.lang.Intege