如何使用spring应用检查亚马逊s3存储桶的总大小和剩余大小？

aws.accessKey=your-access-key
aws.secretKey=your-secret-key

import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;

@Configuration
public class S3Config {
    @Value("${aws.accessKey}")
    private String accessKey;

    @Value("${aws.secretKey}")
    private String secretKey;

    @Bean
    public AmazonS3 amazonS3Client() {
        BasicAWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey);
        return AmazonS3ClientBuilder.standard()
                .withCredentials(new AWSStaticCredentialsProvider(credentials))
                .build();
    }
}

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.Bucket;

@Service
public class S3Service {
    private final AmazonS3 amazonS3;

    public S3Service(AmazonS3 amazonS3) {
        this.amazonS3 = amazonS3;
    }

    public long getTotalBucketSize(String bucketName) {
        List<S3ObjectSummary> objects = amazonS3.listObjects(bucketName).getObjectSummaries();
        long totalSize = 0;

        for (S3ObjectSummary object : objects) {
            totalSize += object.getSize();
        }

        return totalSize;
    }

    public long getRemainingBucketSize(String bucketName) {
        Bucket bucket = amazonS3.listBuckets()
                .stream()
                .filter(b -> b.getName().equals(bucketName))
                .findFirst()
                .orElse(null);

        if (bucket != null) {
            long totalSize = getTotalBucketSize(bucketName);
            long usedSize = bucket.getSize();
            return totalSize - usedSize;
        }

        return 0;
    }
}

@RestController
public class S3Controller {
    private final S3Service s3Service;

    public S3Controller(S3Service s3Service) {
        this.s3Service = s3Service;
    }

    @GetMapping("/bucket/size")
    public ResponseEntity<Map<String, Long>> getBucketSize() {
        String bucketName = "your-bucket-name";
        long totalSize = s3Service.getTotalBucketSize(bucketName);
        long remainingSize = s3Service.getRemainingBucketSize(bucketName);

        Map<String, Long> sizeMap = new HashMap<>();
        sizeMap.put("totalSize", totalSize);
        sizeMap.put("remainingSize", remainingSize);

        return ResponseEntity.ok(sizeMap);
    }
}