CodecRegistry codecRegistry = CodecRegistries.fromRegistries(MongoClient.getDefaultCodecRegistry(),
                                                             CodecRegistries.fromProviders(new JacksonCodecProvider(ObjectMapperFactory.createObjectMapper())));

MongoClientOptions clientOptions = MongoClientOptions.builder()
                                                 .codecRegistry(codecRegistry)
                                                 .build();

MongoClient client = new MongoClient(new ServerAddress(), options);

MongoCollection<BlogPost> blogPosts = client.getDatabase("blog").getCollection("posts", BlogPost.class);

BlogPost blogPost1 = new BlogPost("/first_blog",
                              asList(new BlogPostComment(1, "First Comment"), new BlogPostComment(2, "Second Comment")));

BlogPost blogPost2 = new BlogPost("/second_blog",
                              asList(new BlogPostComment(2, "First Comment"), new BlogPostComment(2, "Second Comment")));

blogPosts.insertMany(asList(blogPost1, blogPost2));

List<BlogPost> allBlogPosts = blogPosts.find().into(new ArrayList<>()));

<dependency>
  <groupId>fr.javatic.mongo</groupId>
  <artifactId>mongo-jackson-codec</artifactId>
  <version>3.0.4__0.2</version>
  <scope>compile</scope>
</dependency>

repositories {
    maven { url "http://dl.bintray.com/ylemoigne/maven" }
}

dependencies {
    compile 'fr.javatic.mongo:mongo-jackson-codec:3.0.4__0.2'
}