java - Mongodb 通过 Java 驱动程序获取集合

Question

我收到以下错误:

程序无法获取集合属性。

        MongoClient mongoClient = new MongoClient(new ServerAddress("localhost", 27017));

        MongoDatabase db = mongoClient.getDatabase("local");

        MongoCollection collection = db.getCollection("sadi");

        BasicDBObject searchQuery = new BasicDBObject();
        searchQuery.put("name","amran");
        DBCursor cursor = collection.find(searchQuery);

Answer 1

试试这个:

    import org.bson.Document;

    import com.mongodb.BasicDBObject;
    import com.mongodb.MongoClient;
    import com.mongodb.ServerAddress;
    import com.mongodb.client.MongoCollection;
    import com.mongodb.client.MongoCursor;
    import com.mongodb.client.MongoDatabase;

    MongoClient mongoClient = new MongoClient(new ServerAddress("localhost", 27017));

    MongoDatabase db = mongoClient.getDatabase("local");

    MongoCollection<Document> collection = db.getCollection("sadi");

    BasicDBObject searchQuery = new BasicDBObject();
    searchQuery.put("name","amran");

    MongoCursor<Document> cursor = collection.find(searchQuery).iterator();  
    try {
        while (cursor.hasNext()) {
            System.out.println(cursor.next().toJson());
        }
    } finally {
        cursor.close();
    }

由于3.0系列java驱动在数据库、集合等方面有很多变化。请通过quick tour为了更多的理解。