在MongoDB的JAVA查询中对应这些问题
and查询
1 //条件 startsAt< curr and endsAt > curr 2 long curr = new Date().getTime()/1000; 3 DBObject query = new BasicDBObject(); 4 query.put("startsAt",new BasicDBObject("$lte", curr)); 5 query.put("endsAt",new BasicDBObject("$gte", curr));
or 查询
1 //条件是startsAt < curr or endsAt>curr 2 BasicDBObject autoEnd = new BasicDBObject(); 3 BasicDBList condList = new BasicDBList(); 4 condList.add(new BasicDBObject("startsAt", new BasicDBObject("$lte", curr))); 5 condList.add(new BasicDBObject("endsAt", new BasicDBObject("$gte", curr))); 6 autoEnd.put("$or",condList);
这是复合查询1 //条件类似：project="H" and (startsAt<curr or endsAt>curr) 2 3 BasicDBObject basicDBObject = new BasicDBObject(); 4 5 BasicDBList endList = new BasicDBList(); 6 BasicDBObject forceEnd = new BasicDBObject(); 7 forceEnd.put("project","H"); 8 9 BasicDBObject autoEnd = new BasicDBObject(); 10 BasicDBList condList = new BasicDBList(); 11 condList.add(new BasicDBObject("startsAt", new BasicDBObject("$lte", curr))); 12 condList.add(new BasicDBObject("endsAt", new BasicDBObject("$gte", curr))); 13 autoEnd.put("$or",condList); 14 15 endList.add(forceEnd); 16 endList.add(autoEnd); 17 18 basicDBObject.put("$and",endList); 19 20 DBCursor cursor = mongoTemplate.getCollection("数据库表名").find(basicDBObject);