mybatis 参数为String，if test读取该参数

错误:There is no getter for property named 'userId' in 'class java.lang.String'
错误写法：

<select id="selectFlowTxInfoDO" resultType="int" parameterType="java.lang.String">
select
count(1)
from first_flow_tx_info fcpi
where 1=1
<if test="userId != null" >
and user_id = #{userId,jdbcType=VARCHAR} and fcpi.tx_status NOT IN (10,00,30,50)
</if>
</select>

正确
<select id="getMaxDepartId" parameterType="java.lang.String" resultType="java.lang.String">
select
count(1)
from first_flow_tx_info fcpi
where 1=1
<if test="_parameter != null" >
and user_id = #{userId,jdbcType=VARCHAR} and fcpi.tx_status NOT IN (10,00,30,50)
</if>
</select>