您可以使用sync来下载整个S3桶。例如，下载当前目录下名为bucket1的整个桶。

aws s3 sync s3://bucket1 .

在AWS CLI下使用该命令:

aws s3 cp s3://bucketname . --recursive

这里有一些东西可以下载所有桶，列出它们，列出它们的内容。

    //connection string
    private static void dBConnection() {
    app.setAwsCredentials(CONST.getAccessKey(), CONST.getSecretKey());
    conn = new AmazonS3Client(app.getAwsCredentials());
    app.setListOfBuckets(conn.listBuckets());
    System.out.println(CONST.getConnectionSuccessfullMessage());
    }

    private static void downloadBucket() {

    do {
        for (S3ObjectSummary objectSummary : app.getS3Object().getObjectSummaries()) {
            app.setBucketKey(objectSummary.getKey());
            app.setBucketName(objectSummary.getBucketName());
            if(objectSummary.getKey().contains(CONST.getDesiredKey())){
                //DOWNLOAD
                try 
                {
                    s3Client = new AmazonS3Client(new ProfileCredentialsProvider());
                    s3Client.getObject(
                            new GetObjectRequest(app.getBucketName(),app.getBucketKey()),
                            new File(app.getDownloadedBucket())
                            );
                } catch (IOException e) {
                    e.printStackTrace();
                }

                do
                {
                     if(app.getBackUpExist() == true){
                        System.out.println("Converting back up file");
                        app.setCurrentPacsId(objectSummary.getKey());
                        passIn = app.getDataBaseFile();
                        CONVERT= new DataConversion(passIn);
                        System.out.println(CONST.getFileDownloadedMessage());
                    }
                }
                while(app.getObjectExist()==true);

                if(app.getObjectExist()== false)
                {
                    app.setNoObjectFound(true);
                }
            }
        }
        app.setS3Object(conn.listNextBatchOfObjects(app.getS3Object()));
    } 
    while (app.getS3Object().isTruncated());
}

/---------------------------- 扩展方法 -------------------------------------/

//Unzip bucket after download 
public static void unzipBucket() throws IOException {
    unzip = new UnZipBuckets();
    unzip.unZipIt(app.getDownloadedBucket());
    System.out.println(CONST.getFileUnzippedMessage());
}

//list all S3 buckets
public static void listAllBuckets(){
    for (Bucket bucket : app.getListOfBuckets()) {
        String bucketName = bucket.getName();
        System.out.println(bucketName + "\t" + StringUtils.fromDate(bucket.getCreationDate()));
    }
}

//Get the contents from the auto back up bucket
public static void listAllBucketContents(){     
    do {
        for (S3ObjectSummary objectSummary : app.getS3Object().getObjectSummaries()) {
            if(objectSummary.getKey().contains(CONST.getDesiredKey())){
                System.out.println(objectSummary.getKey() + "\t" + objectSummary.getSize() + "\t" + StringUtils.fromDate(objectSummary.getLastModified()));
                app.setBackUpCount(app.getBackUpCount() + 1);   
            }
        }
        app.setS3Object(conn.listNextBatchOfObjects(app.getS3Object()));
    } 
    while (app.getS3Object().isTruncated());
    System.out.println("There are a total of : " + app.getBackUpCount() + " buckets.");
}

}

@Layke的回答很好，但如果你有大量的数据，不想永远等待，你应该阅读“AWS CLI S3配置”。

以下命令将告诉AWS CLI使用1,000个线程执行作业(每个小文件或多部分副本的一部分)，并查看100,000个作业:

aws configure set default.s3.max_concurrent_requests 1000
aws configure set default.s3.max_queue_size 100000

运行这些之后，你可以使用简单的sync命令:

aws s3 sync s3://source-bucket/source-path s3://destination-bucket/destination-path

or

aws s3 sync s3://source-bucket/source-path c:\my\local\data\path

在一个拥有4核CPU和16GB RAM的系统上，对于像我这样的情况(3-50GB文件)，同步/复制速度从9.5MiB/s提高到700+MiB/s，比默认配置提高了70倍。

我已经为S3做了一些开发，我还没有找到一个简单的方法来下载整个存储桶。

如果您想用Java编写代码，那么jets3t库很容易用于创建存储桶列表并遍历该列表以下载它们。

首先，从AWS管理咨询器获取一个公共私钥集，这样您就可以创建一个S3service对象:

AWSCredentials awsCredentials = new AWSCredentials(YourAccessKey, YourAwsSecretKey);
s3Service = new RestS3Service(awsCredentials);

然后，获取bucket对象的数组:

S3Object[] objects = s3Service.listObjects(YourBucketNameString);

最后，遍历该数组，每次下载一个对象:

S3Object obj = s3Service.getObject(bucket, fileName);
            file = obj.getDataInputStream();

我把连接代码放在线程安全的单例中。由于显而易见的原因，省略了必要的try/catch语法。

如果你更愿意用Python编写代码，你可以使用Boto。

在查看BucketExplorer之后，“下载整个桶”可能会满足你的需要。

Windows User need to download S3EXPLORER from this link which also has installation instructions :- http://s3browser.com/download.aspx Then provide you AWS credentials like secretkey, accesskey and region to the s3explorer, this link contains configuration instruction for s3explorer:Copy Paste Link in brower: s3browser.com/s3browser-first-run.aspx Now your all s3 buckets would be visible on left panel of s3explorer. Simply select the bucket, and click on Buckets menu on top left corner, then select Download all files to option from the menu. Below is the screenshot for the same:

桶选择界面

然后浏览文件夹以下载特定位置的bucket 点击OK，下载就开始了。