@PreAuthorize("hasPermission('tienchin:channel:edit')")
@GetMapping("/{channelId}")
AjaxResult getInfo(@PathVariable Long channelId) {
    return AjaxResult.success(iChannelService.getById(channelId));
}

/**
 * 根据活动ID查询一个具体的活动信息
 *
 * @param activityId 活动ID
 * @return {@link AjaxResult}
 */
@PreAuthorize("hasPermission('tienchin:activity:edit')")
@GetMapping("/{activityId}")
AjaxResult getInfo(@PathVariable Long activityId) {
    return AjaxResult.success(iActivityService.getActivityById(activityId));
}

/**
 * 根据活动ID查询一个具体的活动信息
 *
 * @param activityId 活动ID
 * @return {@link ActivityVO}
 */
ActivityVO getActivityById(Long activityId);

@Override
public ActivityVO getActivityById(Long activityId) {
    Activity activity = getById(activityId);
    ActivityVO activityVO = new ActivityVO();
    BeanUtils.copyProperties(activity, activityVO);
    return activityVO;
}

<select id="selectActivityList" resultType="top.it6666.activity.domain.vo.ActivityVO">
    SELECT ta.*, tc.channel_name
    FROM tienchin_activity ta,
         tienchin_channel tc
    WHERE ta.channel_id = tc.channel_id
      AND ta.del_flag = 0
      AND tc.del_flag = 0
    <if test="activityName != null and activityName != ''">
        AND ta.activity_name LIKE CONCAT('%', #{activityName}, '%')
    </if>
    <if test="channelId != null">
        AND tc.channel_id = #{channelId}
    </if>
    <if test="activityStatus != null">
        AND ta.activity_status = #{activityStatus}
    </if>
    <if test="activityType != null">
        AND ta.activity_type = #{activityType}
    </if>
</select>