首先需要引入mybatisplus包

<dependency>
	<groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.1.1</version>
</dependency>

第一种注解方式：参数是通过#{}来接收的

public interface ApArticleMapper extends BaseMapper<ApArticle> {

    @Select("SELECT apa.* from ap_article apa LEFT JOIN ap_article_config aac on apa.id = aac.article_id where " +
            "aac.is_delete=0 and aac.is_down=0 and apa.channel_id=2 and publish_time>#{startTime}")
    List<ApArticle> selectRedisVoList(LocalDateTime startTime);
}

调用：

apArticleMapper.selectRedisVoList(startTime);

第二种xml方式：

public interface ApArticleMapper extends BaseMapper<ApArticle> {
    List<ApArticle> pageByOrder(@Param(value="start") Long start, @Param(value="size")Long size, @Param(value="channelId")Integer channelId);
}

xml文件应配置在和mapper平级的resources目录下或者修改yml中mybatis-plus的mapper映射路径

yml中修改如下(mybatis-plus和spring平级)：
mybatis-plus:
  mapper-locations: classpath*:mapper/*.xml



xml文件中的内容：注意namespace要指定到需要配置的mapper上
<mapper namespace="com.jjw.article.mapper.ApArticleMapper">

    <select id="pageByOrder" resultType="com.jjw.article.pojo.ApArticle" parameterType="map">
        SELECT apa.* FROM ap_article apa LEFT JOIN ap_article_config aac on apa.id = aac.article_id
        <where>
            <if test="channelId != null and channelId != 0">
                and apa.channel_id=#{channelId}
            </if>
            and aac.is_delete=0
            and aac.is_down=0
        </where>
        order by publish_time DESC
        limit #{start},#{size}
    </select>
</mapper>

结构如下：

调用方式：

apArticleMapper.pageByOrder(start,size,body.getChannelId());