MongoHelloWorld.java

package lourenco.tech.mongodb;

import com.mongodb.MongoClient;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;

import java.util.ArrayList;
import java.util.List;

public class HelloWorld {

  public static void main(String[] args) {
    //Connect to MongoDB
    MongoClient mongoClient = new MongoClient("localhost");
    MongoDatabase database = mongoClient.getDatabase("dbname");
    MongoCollection<Document> collection = database.getCollection("collectionname");

    //Create some example data
    Document exampleDoc = new Document();
    exampleDoc.put("name", "Lourenco");
    exampleDoc.put("country", "USA");

    Document exampleDoc2 = new Document();
    exampleDoc2.put("name", "John");
    exampleDoc2.put("country", "USA");

    List<Document> multipleDocs = new ArrayList<>();
    multipleDocs.add(exampleDoc);
    multipleDocs.add(exampleDoc2);

    //Insert data in Collection
    collection.insertMany(multipleDocs);

    //Get all entries from Collection
    FindIterable<Document> result = collection.find();

    for (Document docFound : result) {
      System.out.println(docFound.toJson());
    }

    //Create filter
    Document filter = new Document("name", "Lourenco");
    //Find specific entry
    FindIterable<Document> result2 = collection.find(filter);

    for (Document docFound : result2) {
      System.out.println(docFound.toJson());
    }
  }
}