我想用mongodb-java-builder来检索数据库.如何书写代码呢?

Question

{    "_id": {        "$oid": "50a5e1cd703d7e9c65326bf9"     },    "name":"arthur",    "tele": "001-837475"     "address":{                "country":"us",                "state" : "CA",                "city" : "LA"                }     } }我的mongodb中存了很多这样的数据.我有这样的检索需求.查找所有来自加州的人.在shell里是这样query:    db.test.find({"address.state":"CA"})并且能够返回正确的结果.

Answer 1

Mongo db = new Mongo("localhost", 27017);
    DBCollection coll = db.getCollection("collectionname");
    DBObject query = new BasicDBObject("address.state","CA");
    DBCursor cursor = coll.find(query);    while(cursor.hasNext()){        System.out.println(cursor.next());
    }    cursor.close()