如果你进入s3控制台的“Management”选项卡，然后点击“Metrics”，你可以很容易地获得总数和历史记录……选项卡的屏幕截图

最简单的方法是使用开发人员控制台，例如，如果你是chrome浏览器，选择开发人员工具，你可以看到下面，你可以找到和计数或做一些匹配，如280-279 + 1 = 2

.．.

如果使用s3cmd命令行工具，可以获得特定桶的递归列表，并将其输出到文本文件。

s3cmd ls -r s3://logs.mybucket/subfolder/ > listing.txt

然后在linux中，您可以对文件运行wc -l来计算行数(每个对象1行)。

wc -l listing.txt

3Hub已停产。有一个更好的解决方案，你可以使用传输(仅Mac)，然后你只需连接到你的桶，并从视图菜单中选择显示项目计数。

下面是上面嵌入的python脚本的boto3版本。

import sys
import boto3

s3 = boto3.resource("s3")
s3bucket = s3.Bucket(sys.argv[1])
size = 0
totalCount = 0

for key in s3bucket.objects.all():
    totalCount += 1
    size += key.size

print("total size:")
print("%.3f GB" % (size * 1.0 / 1024 / 1024 / 1024))
print("total count:")
print(totalCount)

以下是如何使用java客户端。

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-s3</artifactId>
    <version>1.11.519</version>
</dependency>

import com.amazonaws.ClientConfiguration;
import com.amazonaws.Protocol;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.ObjectListing;

public class AmazonS3Service {

    private static final String S3_ACCESS_KEY_ID = "ACCESS_KEY";
    private static final String S3_SECRET_KEY = "SECRET_KEY";
    private static final String S3_ENDPOINT = "S3_URL";

    private AmazonS3 amazonS3;

    public AmazonS3Service() {
        ClientConfiguration clientConfiguration = new ClientConfiguration();
        clientConfiguration.setProtocol(Protocol.HTTPS);
        clientConfiguration.setSignerOverride("S3SignerType");
        BasicAWSCredentials credentials = new BasicAWSCredentials(S3_ACCESS_KEY_ID, S3_SECRET_KEY);
        AWSStaticCredentialsProvider credentialsProvider = new AWSStaticCredentialsProvider(credentials);
        AmazonS3ClientBuilder.EndpointConfiguration endpointConfiguration = new AmazonS3ClientBuilder.EndpointConfiguration(S3_ENDPOINT, null);
        amazonS3 = AmazonS3ClientBuilder.standard().withCredentials(credentialsProvider).withClientConfiguration(clientConfiguration)
                .withPathStyleAccessEnabled(true).withEndpointConfiguration(endpointConfiguration).build();
    }

    public int countObjects(String bucketName) {
        int count = 0;
        ObjectListing objectListing = amazonS3.listObjects(bucketName);
        int currentBatchCount = objectListing.getObjectSummaries().size();
        while (currentBatchCount != 0) {
            count += currentBatchCount;
            objectListing = amazonS3.listNextBatchOfObjects(objectListing);
            currentBatchCount = objectListing.getObjectSummaries().size();
        }
        return count;
    }
}