Java中mongodb使用and和or的复合查询

 在MongoDB的JAVA查询中对应这些问题

and查询

  //条件 startsAt< curr  and endsAt > curr
 long curr = new Date().getTime()/1000;
         DBObject query = new BasicDBObject();
         query.put("startsAt",new BasicDBObject("$lte", curr));
         query.put("endsAt",new BasicDBObject("$gte", curr));

　　or 查询

  //条件是startsAt < curr or endsAt>curr
  BasicDBObject autoEnd = new BasicDBObject();
          BasicDBList condList = new BasicDBList();
           condList.add(new BasicDBObject("startsAt", new BasicDBObject("$lte", curr)));
           condList.add(new BasicDBObject("endsAt", new BasicDBObject("$gte", curr)));
         autoEnd.put("$or",condList);

 这是复合查询

  //条件类似：project="H" and (startsAt<curr or endsAt>curr)

    BasicDBObject basicDBObject = new BasicDBObject();

         BasicDBList endList = new BasicDBList();
         BasicDBObject forceEnd = new BasicDBObject();
         forceEnd.put("project","H");

         BasicDBObject autoEnd = new BasicDBObject();
         BasicDBList condList = new BasicDBList();
         condList.add(new BasicDBObject("startsAt", new BasicDBObject("$lte", curr)));
         condList.add(new BasicDBObject("endsAt", new BasicDBObject("$gte", curr)));
         autoEnd.put("$or",condList);

         endList.add(forceEnd);
         endList.add(autoEnd);

         basicDBObject.put("$and",endList);

         DBCursor cursor = mongoTemplate.getCollection("数据库表名").find(basicDBObject);