常规查询
public DeviceOnlineStatisticsModel findByKeyAndTimeDateMax(String key) { Sort sort = new Sort(new Order(Direction.DESC, "timeDate")); Criteria criteria = Criteria.where("key").is(key); // Query query = new Query(criteria); query.with(sort).limit(1); List<DeviceOnlineStatisticsModel> deviceOnlineStatisticsModelList = mongoTemplate.find(query, DeviceOnlineStatisticsModel.class); if (deviceOnlineStatisticsModelList.size() == 0) { return null; } return deviceOnlineStatisticsModelList.get(0); }
public List<DeviceOnlineReport> findBetweenTimeDate(Date timeDateStart, Date timeDateEnd) { Criteria criteria = Criteria.where("timeDate").gte(timeDateStart).lt(timeDateEnd); Query query = new Query(criteria); return mongoTemplate.find(query, DeviceOnlineReport.class); }
Criteria//是条件
Sort//排序
Query//查询语句
聚合查询
public DeviceOnlineReport findtest() { TypedAggregation<DeviceOnlineReport> agg = Aggregation.newAggregation(DeviceOnlineReport.class, Aggregation.group("onlineStatus").count().as("num"), Aggregation.project("num").and("onlineStatus").previousOperation()// 结果包含那些字段(num),挑选所需的字段,用"onlineStatus"显示分组的类型,并且不输出以“_id”分组的结果 ); System.out.println(" agg == " + agg.toString()); // { "aggregate" : "__collection__" , "pipeline" : [ { "$group" : {"_id" : "$onlineStatus" , "num" : { "$sum" : 1}}} , { "$project" : {"num" : 1 , "_id" : 0 , "onlineStatus" : "$_id"}}]} AggregationResults<BasicDBObject> result = mongoTemplate.aggregate(agg, BasicDBObject.class); // [{ "num" : 3 , "onlineStatus" : "1"}, { "num" : 3 , "onlineStatus" :"0"}] result.getMappedResults(); System.out.println(" result.getMappedResults == " + result.getMappedResults().toString()); List list = new ArrayList<>(); DeviceOnlineReport deviceOnlineReport = new DeviceOnlineReport(); return deviceOnlineReport; }
public DeviceOnlineReport findtest3() { List<String> collection = new ArrayList<>(); collection.add("0"); collection.add("1"); TypedAggregation<DeviceOnlineReport> agg = Aggregation.newAggregation(DeviceOnlineReport.class, Aggregation.match(Criteria.where("onlineStatus").in(collection)), //条件匹配 (timeDate)minute(timeDate) Aggregation.project("timeDate").andExpression("hour(timeDate)").as("hour"), //andExpression对某个字段执行Mongo命令,并作为新的字段(testTime) Aggregation.group("hour").count().as("num"), Aggregation.project("num").and("hour").previousOperation()// 结果包含那些字段(num),挑选所需的字段,用"onlineStatus"显示分组的类型,并且不输出以“_id”分组的结果 ); System.out.println(" agg == " + agg.toString()); //{ "aggregate" : "__collection__" , "pipeline" : [ { "$match" : { "onlineStatus" : { "$in" : [ "0" , "1"]}}} , { "$project" : { "timeDate" : 1 , "hour" : { "$hour" : [ "$timeDate"]}}} , { "$group" : { "_id" : "$hour" , "num" : { "$sum" : 1}}} , { "$project" : { "num" : 1 , "_id" : 0 , "hour" : "$_id"}}]} AggregationResults<BasicDBObject> result = mongoTemplate.aggregate(agg, BasicDBObject.class);//BasicDBObject result.getMappedResults(); System.out.println(" result.getMappedResults == " + result.getMappedResults().toString()); //[{ "num" : 6 , "hour" : 5}] List list = new ArrayList<>(); DeviceOnlineReport deviceOnlineReport = new DeviceOnlineReport(); return deviceOnlineReport; }
public List<OnlineTime> deviceOnlineTimeStatisticsFromData( DeviceOnlineTimeStatisticsParamModel deviceOnlineTimeStatisticsParamModel) { String logString = "DeviceOnlineTimeStatisticsService deviceOnlineTimeStatisticsService: "; logger.info(logString + "deviceOnlineTimeStatisticsParamModel == " + deviceOnlineTimeStatisticsParamModel.toString()); // 构造符合条件的Criteria String deviceId = deviceOnlineTimeStatisticsParamModel.getDeviceId(); String deviceType = deviceOnlineTimeStatisticsParamModel.getDeviceType(); String modelNo = deviceOnlineTimeStatisticsParamModel.getModelNo(); String cityId = deviceOnlineTimeStatisticsParamModel.getCityId(); Date startDate = deviceOnlineTimeStatisticsParamModel.getStartDate(); Date endDate = deviceOnlineTimeStatisticsParamModel.getEndDate(); if (startDate == null) { startDate = new Date(0, 0, 1); } if (endDate == null) { endDate = new Date(); } logger.info(logString + " startDate == " + startDate); logger.info(logString + " endDate == " + endDate); // 结束时间小于起始时间 if (endDate.before(startDate)) { logger.info(logString + " endDate < startDate"); return null; } Criteria criteria = null; if (StringUtils.isNotBlank(deviceType)) { criteria = Criteria.where("deviceType").is(deviceType); } else { criteria = Criteria.where("deviceType").ne(null); } if (StringUtils.isNotBlank(deviceId)) { criteria.and("deviceId").is(deviceId); } if (StringUtils.isNotBlank(modelNo)) { criteria.and("modelNo").is(modelNo); } if (StringUtils.isNotBlank(cityId)) { criteria.and("cityId").is(cityId); } criteria.and("offlineDate").gte(startDate).lt(endDate); // // 确定分组方式 String groupBy = null; if (deviceOnlineTimeStatisticsParamModel.getGroupType() == 1) { groupBy = "deviceType";// deviceType } else if (deviceOnlineTimeStatisticsParamModel.getGroupType() == 2) { groupBy = "modelNo";// modelNo } else if (deviceOnlineTimeStatisticsParamModel.getGroupType() == 3) { groupBy = "cityId";// cityId } else if (deviceOnlineTimeStatisticsParamModel.getGroupType() == 4) { groupBy = "deviceId";// deviceId } else { groupBy = "deviceType";// deviceType } // match MatchOperation matchOperation = Aggregation.match(criteria);// 条件匹配 // ProjectionOperation projectionOperationYear = Aggregation // .project("deviceType", "offlineDate", "deviceId", "timeLen", // "onlineDate", "src", "modelNo") // .andExpression("year(offlineDate)").as("year").andExpression("month(offlineDate)").as("month"); // ProjectionOperation projectionOperationYear = Aggregation // .project("deviceType", "offlineDate", "deviceId", "timeLen", // "onlineDate", "src", "modelNo") // .andExpression("year(offlineDate)").as("year").andExpression("month(offlineDate)").as("month").and(groupBy).as("groupKey"); //要写成一行,它是以管道的方式进行的,也可以写成多个,但字段是一层层流过去的,你这一层没有,后面的都会没有的 ProjectionOperation projectionOperationYear = Aggregation .project("deviceType", "offlineDate", "deviceId", "timeLen", "onlineDate", "src", "modelNo") .andExpression("year(offlineDate)").as("year").andExpression("month(offlineDate)").as("month"); logger.info(logString + " projectionOperationYear == " + projectionOperationYear.toString()); // group GroupOperation groupOperation = Aggregation.group(groupBy, "year", "month").sum("timeLen").as("timeLen"); logger.info(logString + " groupOperation == " + groupOperation.toString()); // project// // 结果包含那些字段(num),挑选所需的字段,用"onlineStatus"显示分组的类型,并且不输出以“_id”分组的结果 // ProjectionOperation projectionOperation = // Aggregation.project("timeLen", "year", "month").and("groupKey") // .previousOperation(); //结果: //{ //"groupKey":"{ "deviceType" : "0xEF" , "year" : 2016 , "month" : 12}", //"timeLen":70988000 //} ProjectionOperation projectionOperation = Aggregation.project(groupBy, "timeLen", "year", "month").and(groupBy) .as("groupKey").andExclude("_id"); //结果: //{ // "groupKey":"00000025", // "month":12, // "timeLen":440078000, // "year":2016 //} logger.info(logString + " projectionOperation == " + projectionOperation.toString()); // 构造聚合函数 TypedAggregation<DeviceOnlineTimeStatisticsModel> aggregation = Aggregation.newAggregation( DeviceOnlineTimeStatisticsModel.class, matchOperation, projectionOperationYear, groupOperation, projectionOperation); logger.info(logString + " agg == " + aggregation.toString()); // 执行聚合函数 AggregationResults<OnlineTime> result = mongoTemplate.aggregate(aggregation, OnlineTime.class); // logger.info(logString + " result == " + result.getMappedResults()); List<OnlineTime> onlineNunList = result.getMappedResults(); logger.info(logString + " onlineNunList == " + onlineNunList.toString()); return onlineNunList; }
(MongoDB的聚合查询(两种方式)): http://www.cnblogs.com/ontheroad_lee/p/3756247.html
(MongoDB 聚合管道(Aggregation Pipeline)): http://www.cnblogs.com/shanyou/p/3494854.html
(MongoDB的聚合查询(两种方式)): http://blog.csdn.net/luckycz/article/details/46924995
(Aggregation Grouping Example): http://www.mkyong.com/mongodb/spring-data-mongodb-aggregation-grouping-example/
(Spring data mongodb聚合查询): http://wenku.baidu.com/link?url=fdgkdGYnqsBRQfR6g1y78ZPJ77huzJ9ZOzIZeQU1cGkCZNTblirRZhjE0EEToHQEjTDSPJahgpC10ZHzr4iPFiqyuBT9oNLYLg8PQ4SZeGa
(Spring Data MongoDB,英文): http://docs.spring.io/spring-data/mongodb/docs/current/reference/html/#mongo.aggregation
(Spring Data MongoDB(Query and Projection Operators),英文): https://docs.mongodb.com/v3.2/reference/operator/query/
(Aggregation Pipeline基础篇上): http://blog.csdn.net/congcong68/article/details/51619882
(MongoDB分组汇总操作): http://www.cnblogs.com/zhuxiaojie/p/6007267.html
(MongoDB按时间分组): http://stackoverflow.com/questions/26770324/how-to-build-combined-id-property-of-the-group-in-mongo-aggregation-using-spri
(MongoDB按页查询): http://blog.csdn.net/itmyhome1990/article/details/52240900