如何通过 aws Java SDK 公开 S3 对象？
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How do you make an S3 object public via the aws Java SDK?
提问by MikeNereson
How do you make an S3 object public via the AWS Java SDK?
如何通过 AWS Java SDK 公开 S3 对象？
Specifically, what API methods via the Java AWS SDK can be used to make an Object public when its uploaded?
具体来说，通过 Java AWS SDK 的哪些 API 方法可用于在上传对象时将其设为公开？
采纳答案by MikeNereson
Found the answer in an amazon aws forum.
在亚马逊 aws 论坛中找到了答案。
return s3Client.putObject(
new PutObjectRequest(bucketName, objectKey, inputStream, metadata)
.withCannedAcl(CannedAccessControlList.PublicRead));
The answer being
答案是
.withCannedAcl(CannedAccessControlList.PublicRead)
.withCannedAcl(CannedAccessControlList.PublicRead)
回答by Maurice
An alternative approach which allows for more finegrained control of who exactly is allowed to view the object (all users or authenticated users only):
另一种方法允许更精细地控制允许谁查看对象（仅限所有用户或经过身份验证的用户）：
PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, keyName, image);
AccessControlList acl = new AccessControlList();
acl.grantPermission(GroupGrantee.AllUsers, Permission.Read); //all users or authenticated
putObjectRequest.setAccessControlList(acl);
s3client.putObject(putObjectRequest);
