如何在Java中编写mongodb查询

Question

I want to do spatial search in my android app. I am trying to write mongodb query in java but unable to do so. How to use this mongodb query in java

db.places.find( { loc: { $geoWithin : { $center : [ [longitude, latitude], 10 ] } } } )

I am new to mongodb and spatial search.

Please help!!!

Thanks in advance.

Answer 1

look at the api: http://api.mongodb.org/java/2.11.1/

BasicDBList geoCoord = new BasicDBList();
    geoCoord.add(longitude);
    geoCoord.add(latitude);

    BasicDBList geoParams = new BasicDBList();
    geoParams.add(geoCoord);
    geoParams.add(10);

    BasicDBObject query = new BasicDBObject("loc", 
        new BasicDBObject("$geoWithin", 
            new BasicObject("$center", geoParams)
        )
    );