Mybatis传入 List＜Map＜String,Object＞＞的入参

直接上代码吧：

service层：

 Map<String,Object>  paramMap = new HashMap<>();
        List<Map<String,Object>>  paramMapList = new ArrayList<>();
        for(ChannelParam channelParam:paramList){
            paramMap.put("device_serial",channelParam.getDeviceSerial());
            paramMap.put("channel_no",channelParam.getChannelNo());
            paramMapList.add(paramMap);
        }
        List<DeviceChannel> deviceChannelList = channelMapper.selectListByChannel(paramMapList);

备注：这里的ChannelParam类是个实体类

@Data
public class ChannelParam {

    private String deviceSerial;
    private Integer channelNo;
}

mapper层：

List<DeviceChannel> selectListByChannel(List<Map<String,Object>>  paramMapList);

sql配置文件：

<select id="selectListByChannel" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List"/>
    from device_channel
    where
    <foreach item="item" index="key" collection="list"
             open="" separator="OR" close="">
      device_serial=#{item.device_serial} and
      channel_no = #{item.channel_no}
    </foreach>

  </select>

解释一下：   collection这里用的是list，这个是mybatis源码中默认的，非list用collection，可以跟进源码看看

     item.device_serial 和 item.channel_no  就相当于 获取map的key名和value