Mybatis中傳參包There is no getter for property named ‘XXX‘ in ‘class java.lang.String‘

一、發現問題

<select id="queryStudentByNum" resultType="student" parameterType="string">

select num,name,phone from student
<where>
<if test = " num!=null and num!=‘‘ ">
AND num = #{num}
</if>
</where>

二、解決問題

<select id="queryStudentByNum" resultType="student" parameterType="string">

select num,name,phone from student
<where>
<if test = "_parameter!=null">
AND num = #{_parameter}

三、原因分析

Mybatis默認采用ONGL解析參數，所以會自動采用對象樹的形式取string.num值，引起報錯。也可以public List methodName(@Param(value="num") String num)的方法說明參數值

Mybatis中傳參包There is no getter for property named 'XXX' in 'class java.lang.String'