MyBatis Like 拼接

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我在公司开发中摘取的一段例子，完全有效

<select id="strategy_get" resultType="map">
    select * from strategy
    where merchantid = #{merchantid}
    <choose>
        <when test="title != null and title != ''">
            and title like concat(concat('%',#{title}),'%')
        </when>
    </choose>
</select>