XH-Power-Cloud/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysUserPostMapper.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="com.xhpc.system.mapper.SysUserPostMapper">

	<resultMap type="SysUserPost" id="SysUserPostResult">
		<result property="userId" column="user_id"/>
		<result property="postId" column="post_id"/>
	</resultMap>

	<delete id="deleteUserPostByUserId" parameterType="Long">
		delete
		from sys_user_post
		where user_id = #{userId}
	</delete>

	<select id="countUserPostById" resultType="Integer">
		select count(1)
		from sys_user_post
		where post_id = #{postId}
	</select>

	<delete id="deleteUserPost" parameterType="Long">
 		delete from sys_user_post where user_id in
		<foreach collection="array" item="userId" open="(" separator="," close=")">
			#{userId}
		</foreach>
	</delete>

	<insert id="batchUserPost">
		insert into sys_user_post(user_id, post_id) values
		<foreach item="item" index="index" collection="list" separator=",">
			(#{item.userId},#{item.postId})
		</foreach>
	</insert>

</mapper>