src/main/resources/mybatis/system/UserRoleMapper.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.huaheng.pc.system.user.mapper.UserRoleMapper">
    <resultMap type="com.huaheng.pc.system.user.domain.UserRole" id="UserRoleResult">
        <result property="id" column="id"/>
        <result property="userId" column="userId"/>
        <result property="roleId" column="roleId"/>
    </resultMap>
    <delete id="deleteUserRoleByUserId">
        delete
        from sys_user_role
        where id in
              (select a.id
               from (SELECT ur.id
                     from sys_user_role ur
                              left join sys_role r on ur.roleId = r.id
                     where ur.userId = ${userId} ) a)
    </delete>
    <select id="countUserRoleByRoleId" resultType="java.lang.Integer">
        select count(1)
        from sys_user_role
        where roleId = #{roleId}
    </select>
    <delete id="deleteUserRole">
        delete from sys_user_role where userId in
        <foreach collection="array" item="userId" open="(" separator="," close=")">
            #{userId}
        </foreach>
    </delete>
    <insert id="batchUserRole">
        insert into sys_user_role(userId, roleId) values
        <foreach item="item" index="index" collection="list" separator=",">
            (#{item.userId},#{item.roleId})
        </foreach>
    </insert>
</mapper>