MongoClient mongo = new MongoClient("localhost", 27017);
DB db = mongo.getDB("lamevabbdd");
DBCollection table = db.getCollection("persona");
BasicDBObject query = new BasicDBObject();
query.put("name", "mkyong");
BasicDBObject newDocument = new BasicDBObject(); newDocument.put("name", "mkyong-updated");
BasicDBObject updateObj = new BasicDBObject();
updateObj.put("$set", newDocument);
table.update(query, updateObj);