<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="fruit">
<select id="showcase">
SELECT
*
FROM
t_showcase
<where>
<if test="dataTypes.length>0">
data_type in
<foreach collection="dataTypes" item="value" open="(" close=")" separator=",">
#{value}
</foreach>
</if>
</where>
</select>
</mapper>