执行批量操作

// Runs bulk write operations on a collection by using the Java driver
package usage.examples;
import java.util.Arrays;
import org.bson.Document;
import com.mongodb.MongoException;
import com.mongodb.bulk.BulkWriteResult;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.model.DeleteOneModel;
import com.mongodb.client.model.InsertOneModel;
import com.mongodb.client.model.ReplaceOneModel;
import com.mongodb.client.model.UpdateOneModel;
import com.mongodb.client.model.UpdateOptions;
public class BulkWrite {
    public static void main(String[] args) {
        // Replace the uri string with your MongoDB deployment's connection string
        String uri = "<connection string uri>";
        try (MongoClient mongoClient = MongoClients.create(uri)) {
            MongoDatabase database = mongoClient.getDatabase("sample_mflix");
            MongoCollection<Document> collection = database.getCollection("movies");
            try {
                // Runs a bulk write operation for the specified insert, update, delete, and replace operations
                BulkWriteResult result = collection.bulkWrite(
                        Arrays.asList(
                                new InsertOneModel<>(new Document("name", "A Sample Movie")),
                                new InsertOneModel<>(new Document("name", "Another Sample Movie")),
                                new InsertOneModel<>(new Document("name", "Yet Another Sample Movie")),
                                new UpdateOneModel<>(new Document("name", "A Sample Movie"),
                                        new Document("$set", new Document("name", "An Old Sample Movie")),
                                        new UpdateOptions().upsert(true)),
                                new DeleteOneModel<>(new Document("name", "Yet Another Sample Movie")),
                                new ReplaceOneModel<>(new Document("name", "Yet Another Sample Movie"),
                                        new Document("name", "The Other Sample Movie").append("runtime",  "42"))
                                ));
                // Prints the number of inserted, updated, and deleted documents
                System.out.println("Result statistics:" +
                        "\ninserted: " + result.getInsertedCount() +
                        "\nupdated: " + result.getModifiedCount() +
                        "\ndeleted: " + result.getDeletedCount());
            // Prints a message if any exceptions occur during the operations
            } catch (MongoException me) {
                System.err.println("The bulk write operation failed due to an error: " + me);
            }
        }
    }
}