递归列出目录下所有文件（java）

https://help.aliyun.com/document_detail/32015.html?spm=5176.product8314910_31815.6.289.VSWXOo

分页获取所有Object

分页获取所有Object，每页maxKeys条Object。

final int maxKeys = 30;
String nextMarker = null;
do {
    objectListing = ossClient.listObjects(new ListObjectsRequest("<bucketName>").withMarker(nextMarker).withMaxKeys(maxKeys));

    List<OSSObjectSummary> sums = objectListing.getObjectSummaries();
    for (OSSObjectSummary s : sums) {
        System.out.println("\t" + s.getKey());
    }

    nextMarker = objectListing.getNextMarker();

} while (objectListing.isTruncated());