mapper接口
public void batchDelete(@Param(value = "activityId") Integer activityId, @Param(value = "userIds") Integer[] userIds);
mapper.xml的配置
<insert id="batchDelete">
delete from T_ACT_USERS where ACTIVITY_ID = #{activityId}
and USER_ID in
<foreach collection="userIds" item="item" index="index" open="(" separator="," close=")">
#{item}
</foreach>
</insert>