I’ve been working with Java a ton this year, more so than the previous years, so I decided to put together the top three Java libraries for accessing MongoDB that I’ve been using. That top 3 list shapes up like this.

1. MongoDB Java Driver: This is the official Java driver provided by MongoDB. It allows Java applications to connect to MongoDB and work with data. The driver supports synchronous and asynchronous interaction with MongoDB and provides a rich set of features for database operations.
   • Key Methods:
     • MongoClients.create(): To create a new client connection to the database.
     • MongoDatabase.getCollection(): To access a collection from the database.
     • MongoCollection.find(): To find documents within a collection.
2. Morphia: Morphia is an Object-Document Mapper (ODM) for MongoDB and Java. It provides a higher-level, object-oriented API to interact with MongoDB, and maps Java objects to MongoDB documents.
   • Key Methods:
     • Datastore.createQuery(): To create a query for the type of entity you want to retrieve.
     • Datastore.save(): To save an entity to the database.
     • Query.asList(): To execute a query and get the results as a list.
3. Spring Data MongoDB: Part of the larger Spring Data project, Spring Data MongoDB provides integration with MongoDB to work with the data as easily as if it were a relational database. It’s a popular choice for Spring-based applications.
   • Key Methods:
     • MongoRepository.findAll(): To find all documents in a collection.
     • MongoRepository.save(): To save a given entity.
     • MongoRepository.findById(): To find a document by its ID.

These libraries offer comprehensive methods for connecting to and working with MongoDB from Java applications. They are widely used in the Java community and are supported by a large number of developers and organizations. Let’s dive deeper with each, and also more specifically talk about some of their respective query methods.

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