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

1、發現問題html <select id="queryStudentByNum" resultType="student" parameterType="string">  java select num,name,phone from student   <where>  <if test = " num!=null and num!='' "> AND num = #{num} </if>
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