问题
lets think we have bucket with name "bucket1" and inside that having a
folder with name 'new folder'
Inside 'new folder' are files
new folder/a1.pdf-->2mb
new folder/a2.pdf-->2mb
new folder/new folder2/b.pdf-->3mb
when we use amazons3client.listObjects("bucket1","new folder")---->it will return the list of files and folders inside that for each 's3object' there is 'size' parameter i can loop through all those s3 objects and i can get folder size but it is heavy operation.
/* will you please any another way to get folder size*/
回答1:
There is not another way.
The "folder" is not a container in S3 so it has no size, itself.
来源：https://stackoverflow.com/questions/48378288/how-to-get-folder-size-which-consists-of-files-in-aws-using-java