我尝试了以下代码成功下载了一个文件,但无法下载所有文件列表
client.getObject(
new GetObjectRequest(bucketName, "TestFolder/TestSubfolder/Psalm/P.txt"),
new File("test.txt"))
提前致谢
更新我尝试了下面的代码,但得到了目录列表,我想要文件列表
val listObjectsRequest = new ListObjectsRequest().
withBucketName("tivo-hadoop-dev").
withPrefix("prefix").
withDelimiter("/")
client.listObjects(listObjectsRequest).getCommonPrefixes
这是一件简单的事情,但在得出下面提到的答案之前,我像任何事情一样挣扎。
我找到了一个java代码并相应地更改为scala,它可以工作
val client = new AmazonS3Client(credentials)
val listObjectsRequest = new ListObjectsRequest().
withBucketName("bucket-name").
withPrefix("path/of/dir").
withDelimiter("/")
var objects = client.listObjects(listObjectsRequest);
do {
for (objectSummary <- objects.getObjectSummaries()) {
var key = objectSummary.getKey()
println(key)
var arr=key.split("/")
var file_name = arr(arr.length-1)
client.getObject(
new GetObjectRequest("bucket" , key),
new File("some/path/"+file_name))
}
objects = client.listNextBatchOfObjects(objects);
} while (objects.isTruncated())
下面的代码快速而有用,尤其是当您想下载特定本地目录中的所有对象时。它将文件维护在完全相同的 s3 前缀层次结构下
val xferMgrForAws:TransferManager = TransferManagerBuilder.standard().withS3Client(awsS3Client).build();
var objectListing:ObjectListing = null;
objectListing = awsS3Client.listObjects(awsBucketName, prefix);
val summaries:java.util.List[S3ObjectSummary] = objectListing.getObjectSummaries();
if(summaries.size() > 0) {
val xfer:MultipleFileDownload = xferMgrForAws.downloadDirectory(awsBucketName, prefix, new File(localDirPath));
xfer.waitForCompletion();
println("All files downloaded successfully!")
} else {
println("No object present in the bucket !");
}