How to return data from mongodb collection in java?

@domenico 

To return data from a MongoDB collection in Java, you can follow these steps:

1. Connect to the MongoDB server using the MongoClient class:

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

1. Choose the database and collection you want to retrieve data from:

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MongoDatabase database = mongoClient.getDatabase("yourDatabaseName");
MongoCollection<Document> collection = database.getCollection("yourCollectionName");

1. Perform a query to retrieve data from the collection. You can use the find() method to return all documents in the collection or use filters to retrieve specific documents:

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FindIterable<Document> documents = collection.find();
for (Document document : documents) {
    System.out.println(document);
}

1. You can also add filters to your query using the Filters class:

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Bson filter = Filters.eq("fieldName", "fieldValue");
FindIterable<Document> filteredDocuments = collection.find(filter);

1. Finally, close the MongoDB connection when you are done:

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mongoClient.close();

By following these steps, you can retrieve data from a MongoDB collection in Java and work with the returned documents as needed.