mybatis xml动态语句写法

mapper.java:

 /**
    * @Description: 根据摄像机Id查询出入记录
    * @Param:
     * name        姓名
     * monitorId   布控ID
     * starttime   开始时间
     * endtime     结束时间
     * begin       页码
     * pageSize    查询数量
    * @return:
    * @throws Exception
    * @author: hw
    * @date: 2019/6/11 14:28
    */
    List<OutInRecords> queryOutInRecords(@Param("name") String name,@Param("monitorId") String monitorId,
                                         @Param("starttime") String starttime, @Param("endtime") String endtime,
                                         @Param("begin") Integer begin, @Param("pageSize") Integer pageSize);

mapper.xml

<select id="queryOutInRecords" resultMap="OutInRecords" parameterType="map">
    select
    a_oir.similarity,a_oir.`status`,a_oir.`timestamp`,a_ci.in_out,a_mi.monitor_name,a_si.person_type,a_si.address,a_si.`name`
    from aiapp_out_in_record a_oir
    LEFT JOIN aiapp_camera_info a_ci ON a_ci.camera_id = a_oir.camera_id
    LEFT JOIN aiapp_staff_info a_si ON a_oir.faceimage_id = a_si.faceimage_id

    <if test="monitorId != null ">
      LEFT JOIN aiapp_monitor_info a_mi ON a_mi.monitor_id = ${monitorId}
    </if>
    <if test="monitorId == null ">
      LEFT JOIN aiapp_monitor_info a_mi ON a_mi.monitor_id = (SELECT a_cm.monitor_id FROM aiapp_camera_monitor a_cm WHERE a_cm.camera_id = a_oir.camera_id)
    </if>

    <trim prefix="where" prefixOverrides="and">
      <if test="monitorId != null ">
        AND a_oir.camera_id in (SELECT a_cm.camera_id FROM aiapp_camera_monitor a_cm WHERE a_cm.monitor_id = ${monitorId})
      </if>

      <if test="name != null ">
        AND a_oir.faceimage_id = (SELECT a_si.faceimage_id FROM aiapp_staff_info a_si WHERE a_si.`name` = '${name}')
      </if>

      <if test="starttime != null and endtime != null">
        AND a_oir.`timestamp` BETWEEN ${starttime} and ${endtime}
      </if>
      <if test="starttime != null and endtime == null">
        AND a_oir.`timestamp` > ${starttime}
      </if>
      <if test="starttime == null and endtime != null">
        AND ${starttime} > a_oir.`timestamp`
      </if>
    </trim>

    order by a_oir.`timestamp` desc
    <if test="begin != null and pageSize != null">
      limit ${begin}, ${pageSize}
    </if>
  </select>