controller层：

 /**
     * 查询最近一周每天的行为识别总人数
     * @return
     */
    @ApiOperation("查询最近一周每天的行为识别总人数")
//    @RequiresPermissions("zhgd:aialarmdata:selectShu")
    @GetMapping("/selectShu")
    public List<List> selectShu(){
        List<List> list = new ArrayList<>();
        List<String> time = aiAlarmDataService.selectByDateTime();
        List<String> shu = aiAlarmDataService.selectCount();
        list.add(time);
        list.add(shu);
        return list;
    }

service层：

    /** Dragon加 */
    /**
     * 查询所有日期
     * @return
     */
    public List<String> selectByDateTime();


    /**
     * 查询今天和前6天的行为识别总人数
     * @return
     */
    public List<String> selectCount();

serviceImpl：

    /** Dragon加 */
    /**
     * 查询所有日期
     * @return
     */
    @Override
    public List<String> selectByDateTime() {
        return aiAlarmDataMapper.selectByDateTime();
    }

    /**
     * 查询今天和前6天的行为识别总人数
     * @return
     */
    @Override
    public List<String> selectCount(){
        return aiAlarmDataMapper.selectCount();
    }

mapper：

    /** Dragon加 */
    /**
     * 查询所有日期
     * @return
     */
    public List<String> selectByDateTime();

    /**
     * 查询今天和前6天的行为识别总人数
     * @return
     */
    public List<String> selectCount();

    <!-- Dragon加 -->
    <select id="selectByDateTime" resultType="String">
        (SELECT @date := DATE_SUB(@date, INTERVAL 1 DAY) time FROM
            (SELECT @date := DATE_ADD(CURDATE(), INTERVAL 1 DAY) FROM ai_alarm_data LIMIT 7)
            days) ORDER BY time
    </select>

    <select id="selectCount" resultType="String">
        SELECT IFNULL(b.wdaqm,0)  FROM
            (SELECT @date := DATE_SUB(@date, INTERVAL 1 DAY) time FROM
                (SELECT @DATE := DATE_ADD(CURDATE(), INTERVAL 1 DAY) FROM ai_alarm_data LIMIT 7) AS time
            ) AS a
                LEFT JOIN
            (SELECT DATE_FORMAT(date_time,'%Y-%m-%d') time, COUNT(1) wdaqm
             FROM ai_alarm_data GROUP BY DATE_FORMAT(date_time,'%Y-%m-%d'))AS b
            ON a.time=b.time ORDER BY a.time
    </select>
</mapper>