如何使用Java在MongoDB中获取对象数组中的特定字段？

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.12.7</version>
</dependency>

MongoClient mongoClient = new MongoClient("localhost", 27017);
MongoDatabase database = mongoClient.getDatabase("your_database_name");
MongoCollection<Document> collection = database.getCollection("your_collection_name");

List<Document> pipeline = Arrays.asList(
    new Document("$unwind", "$your_array_field"), // 展开数组
    new Document("$project", new Document("_id", 0).append("your_array_field.your_specific_field", 1)) // 选择特定字段
);

AggregateIterable<Document> result = collection.aggregate(pipeline);
for (Document document : result) {
    // 处理查询结果
    System.out.println(document.toJson());
}