修复空指针

device-api-service/src/main/java/com/xy/service/DeviceInfoServiceImpl.java

@@ -788,7 +788,7 @@ public class DeviceInfoServiceImpl extends ServiceImpl<DeviceInfoMapper, DeviceI
             Long districtId = v.getDistrictId();
             vo.setDeviceNum(v.getDeviceNum());
             vo.setDistrictId(v.getDistrictId());
-            vo.setDistrictName(Emptys.check(districtMap.get(v.getDistrictId())) ? districtMap.get(v.getDistrictId()) : "未分配区域");
+            vo.setDistrictName(v.getDistrictId()==-1L ? "未分配区域" : districtMap.get(v.getDistrictId()));
             //区域下的设备列表
             List<DeviceInfoDto.MercHomeDeviceVo> deviceInfos = BeanUtil.copyToList(deviceMap.get(districtId), DeviceInfoDto.MercHomeDeviceVo.class);
             if (CollUtil.isEmpty(deviceInfos)) {