springdata jpa 查询部分字段 r囧r小猫 2021-11-10 16:08 526阅读 0赞 > jpql 分页查询部分字段，不采用interface接口类，采用Map接收 * Map接收查询结果，再从Map里取值 //查询地图巡查员详情信息 @Query(value = "select obs.id as id,obs.observerName as observerName,obs.isOnline as isOnline,obs.geoX as geoX,obs.geoY as geoY," + "obs.gpsTime as gpsTime,obs.mobile as mobile,obs.userType as userType,ar.areaName as areaName,an.filePath as obsIcon,ows.signDate as signDate " + " from Observer obs left join Area ar on (obs.areaId = ar.id) " + "left join ObserverWorkSignLog ows on (obs.id = ows.observerId) left join Annexe an on (obs.photoId = an.id)" + "where obs.id = ?1 order by ows.signDate DESC ") Page<Map<String,Object>> findObserverDetailInfo(Long obsId,Pageable pageable); * Map取值，这里是因为相关数据有多条，只需要最新一条，采用分页，但只查一条 `Pageable pageable=PageRequest.of(0,1);` @Override public SuperviseObserverInfo findObserverDetailInfo(Long obsId){ Pageable pageable=PageRequest.of(0,1); SuperviseObserverInfo observerInfo = null; Page<Map<String,Object>> info = observerRepository.findObserverDetailInfo(obsId,pageable); if (null != info.getContent()){ Map<String,Object> map = info.getContent().get(0); observerInfo = new SuperviseObserverInfo(); observerInfo.setId(KEDataTypeUtil.objToLong(map.get("id"))); observerInfo.setAreaName(KEDataTypeUtil.objToString(map.get("areaName"))); observerInfo.setObserverName(map.get("observerName").toString()); observerInfo.setMobile(map.get("mobile").toString()); observerInfo.setIsOnline(KEDataTypeUtil.objToInteger(map.get("isOnline"))); observerInfo.setUserType(KEDataTypeUtil.objToInt(map.get("userType"))); observerInfo.setGeoX(KEDataTypeUtil.objToDouble(map.get("geoX"))); observerInfo.setGeoY(KEDataTypeUtil.objToDouble(map.get("geoY"))); observerInfo.setObsIcon(KEDataTypeUtil.objToString(map.get("obsIcon"))); observerInfo.setGpsTime(KEDataTypeUtil.objToTimestamp(map.get("gpsTime"))); observerInfo.setSignDate(KEDataTypeUtil.objToTimestamp(map.get("signDate"))); } return observerInfo; } * 如果查询多条，并且分页可以使用interface写法 [interface查询部分字段][interface] [interface]: https://blog.csdn.net/qq_31424825/article/details/90544706
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