MyBatis报错：there is no getter for property named * in class java.lang.String

Bug：

在MyBatis里原先是这么写的，执行后报错：there is no getter for property named agentmechId in class java.lang.String。

<select id="getRolesListByAgentmechId" parameterType="java.lang.String" resultType="java.util.Map">
    select DISTINCT a.ROLE_ID AS ROLEID, C.USER_ID AS USERID  from TL_MANAGE_RIGHT_DATA a
    left join TL_MANAGE_USER_ROLE B ON A.ROLE_ID=B.ROLE_ID
    LEFT JOIN TL_MANAGE_USER c on B.USER_ID = C.USER_DEPID
    where a.ROLE_ID not in(1)
    <if test="agentmechId != '' and agentmechId != null">
        and a.NUM_AGENTMECHID in (${agentmechId})
    </if>
</select>

Fix：

parameterType为String时，用_parameter代替入参名，正确写法：

<select id="getRolesListByAgentmechId" parameterType="java.lang.String" resultType="java.util.Map">
    select DISTINCT a.ROLE_ID AS ROLEID, C.USER_ID AS USERID  from TL_MANAGE_RIGHT_DATA a
    left join TL_MANAGE_USER_ROLE B ON A.ROLE_ID=B.ROLE_ID
    LEFT JOIN TL_MANAGE_USER c on B.USER_ID = C.USER_DEPID
    where a.ROLE_ID not in(1)
    <if test="_parameter != null and _parameter != ''">
        and a.NUM_AGENTMECHID in (${_parameter})
    </if>
</select>