获取S3文件夹中的最后一个文件名？

import software.amazon.awssdk.services.s3.S3Client;
import software.amazon.awssdk.services.s3.model.ListObjectsV2Request;
import software.amazon.awssdk.services.s3.model.ListObjectsV2Response;
import software.amazon.awssdk.services.s3.model.S3Object;

import java.util.Comparator;
import java.util.List;

public class S3LastFileExample {
    public static void main(String[] args) {
        String bucketName = "your-s3-bucket-name";
        String folderPath = "your-s3-folder-path";

        S3Client s3Client = S3Client.create();

        // 构建S3文件列表请求
        ListObjectsV2Request listRequest = ListObjectsV2Request.builder()
                .bucket(bucketName)
                .prefix(folderPath)
                .build();

        // 获取S3文件列表
        ListObjectsV2Response listResponse = s3Client.listObjectsV2(listRequest);
        List<S3Object> objects = listResponse.contents();

        // 对文件列表进行排序，按最后修改时间降序
        objects.sort(Comparator.comparing(S3Object::lastModified).reversed());

        if (!objects.isEmpty()) {
            S3Object lastFile = objects.get(0);
            String lastFileName = lastFile.key();
            System.out.println("最后一个文件名：" + lastFileName);
        } else {
            System.out.println("文件夹中没有文件。");
        }
    }
}