src/main/resources/mapper/WorkMybatisMapper.xml

<?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="edu.bjtu.groupone.backend.mapper.WorkMybatisMapper">

    <!-- 结果集映射 -->
    <resultMap id="WorkResultMap" type="Work">
        <id property="id" column="id"/>
        <result property="title" column="title"/>
        <result property="description" column="description"/>
        <result property="categoryId" column="category_id"/>
        <result property="createTime" column="create_time"/>
    </resultMap>

    <!-- 查询所有作品 -->
    <select id="findAll" resultMap="WorkResultMap">
        SELECT id, title, description, category_id, create_time
        FROM works
    </select>

    <!-- 根据分类ID列表分页查询 -->
    <select id="findByCategoryIdIn" resultMap="WorkResultMap">
        SELECT * FROM works
        <where>
            <if test="categoryIds != null and categoryIds.size() > 0">
                category_id IN
                <foreach item="categoryId" collection="categoryIds"
                         open="(" separator="," close=")">
                    #{categoryId}
                </foreach>
            </if>
        </where>
        ORDER BY create_time DESC
        LIMIT #{pageable.pageSize} OFFSET #{pageable.offset}
    </select>

</mapper>