封装接口返回数据方法

src/main/java/com/welampiot/service/impl/AirSwitchInfoServiceImpl.java

@@ -84,6 +84,7 @@ public class AirSwitchInfoServiceImpl implements AirSwitchInfoService {
     public AirSwitchDetailVO getAirSwitchDetail(Integer id) {
         AirSwitchDetailVO airSwitchDetailVO = new AirSwitchDetailVO();
         AirSwitchInfoDTO airSwitchInfoDTO = airSwitchInfoDao.getAirSwitchDetailById(id);
+        if (airSwitchInfoDTO == null) return null;
             airSwitchDetailVO.setName(airSwitchInfoDTO.getName());
             airSwitchDetailVO.setAddress(airSwitchInfoDTO.getAddress());
             airSwitchDetailVO.setBoxId(airSwitchInfoDTO.getBoxId().toString());