Java中mongodb使用and和or的复合查询

  • Z时代
  • 2024-01-10
  • 分类：综合

java

 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);

　　
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