Find some values in a mongodb collection?

Question

Im trying to read a (mongo)userdatabase with java. On the tutorial page I saw how to read the whole collection. I can do something like that:

    DBCursor cu         


        

Answer 1

You can query desired data directly:

BasicDBObject query = new BasicDBObject();
query.put("name", "user");
query.put("password", "[YOUR ENCRYPTED PASSWORD HERE]");

DBCollection collection = db.getCollection("yourcollectionname");
DBCursor cursor = collection.find(query);

while (cursor.hasNext()) {
  //do something with cursor.next();
}

As was suggested you need to check count of results returned by find() method to make sure only single record matches your query.