优化Catalog查询内存占用高的问题

src/main/java/com/genersoft/iot/vmp/gb28181/dao/DeviceChannelMapper.java

@@ -5,11 +5,13 @@ import com.genersoft.iot.vmp.gb28181.bean.DeviceChannel;
 import com.genersoft.iot.vmp.gb28181.controller.bean.ChannelReduce;
 import com.genersoft.iot.vmp.gb28181.dao.provider.DeviceChannelProvider;
 import com.genersoft.iot.vmp.service.bean.GPSMsgInfo;
+import com.genersoft.iot.vmp.streamPush.bean.StreamPush;
 import com.genersoft.iot.vmp.web.gb28181.dto.DeviceChannelExtend;
 import org.apache.ibatis.annotations.*;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
+import java.util.Map;
 
 /**
  * 用于存储设备通道信息