如何使用java API为S3中的对象指定ACL？

AmazonS3 s3Client = new AmazonS3Client();

PutObjectRequest putRequest = new PutObjectRequest(bucketName, objectKey, new File(filePath));
AccessControlList acl = new AccessControlList();

// 设置ACL规则
acl.grantPermission(new CanonicalGrantee("CanonicalUser-ID"), Permission.Read); // 设置具有读取权限的用户
acl.grantPermission(GroupGrantee.AllUsers, Permission.Read); // 设置公共读取权限

putRequest.setAccessControlList(acl);

s3Client.putObject(putRequest);