How to find documents matching multiple criteria

Question

I\'m trying to query a collection using operands AND\'d together. I\'ve got the shell version working:

db.widgets.find({color: \'black, shape: \'round\', wei         


        

Answer 1

BasicDBObject criteria = new BasicDBObject();
criteria.append("color", "black");
criteria.append("shape", "round");
criteria.append("weight", 100);

DBCursor cur = widgets.find(criteria);

Answer 2

I think the solution above should also work just fine, given the situation I'd suggest the following as an alternative. This is using Criteria

    Query query = new Query();
    List<Criteria> criteriaList = new ArrayList<>();
Criteria criteriaCreatedBy1 = new Criteria().where("title").is("input");
criteriaList.add(criteriaCreatedBy1);
Criteria criteriaCreatedBy2 = new Criteria().where("name").is("name input");
criteriaList.add(criteriaCreatedBy2);
    query.addCriteria(new Criteria().andOperator(criteriaList.toArray(new Criteria[criteriaList.size()])));
    List<Screen> getSearchScreens = mongoTemplate.find(query,Screen.class,"collectionName");

Answer 3

Another way to solve same problem is using aggregation:

// To print results
    Block<Document> printBlock = new Block<Document>() {
        @Override
        public void apply(final Document document) {
            System.out.println(document.toJson());
        }
    };    

// get  db connection and collection 
MongoDatabase db= mongoClient.getDatabase("dbname");
    MongoCollection<Document> collection= database.getCollection("collectionname");

collection.aggregate(Arrays.asList(Aggregates.match(Filters.eq("key1", "value1")),
            Aggregates.match(Filters.eq("key2", "value2")),
            Aggregates.match(Filters.eq("key3", "value3")))).forEach(printBlock);

For more details please refer the v 3.4 mongo Aggregation documentation.

http://mongodb.github.io/mongo-java-driver/3.4/driver/tutorials/aggregation/