aws-sdk-java-v2-s3

仓库: giuseppe-trisciuoglio/developer-kit
安装量: 320
排名: #2885

安装

npx skills add https://github.com/giuseppe-trisciuoglio/developer-kit --skill aws-sdk-java-v2-s3

AWS SDK for Java 2.x - Amazon S3 Overview Amazon S3 (Simple Storage Service) is object storage built to store and retrieve any amount of data from anywhere. This skill covers patterns for working with S3 using AWS SDK for Java 2.x, including bucket operations, object uploads/downloads, presigned URLs, multipart transfers, and Spring Boot integration. When to Use Use this skill when: Creating, listing, or deleting S3 buckets with proper configuration Uploading or downloading objects from S3 with metadata and encryption Working with multipart uploads for large files (>100MB) with error handling Generating presigned URLs for temporary access to S3 objects Copying or moving objects between S3 buckets with metadata preservation Setting object metadata, storage classes, and access controls Implementing S3 Transfer Manager for optimized file transfers Integrating S3 with Spring Boot applications for cloud storage Setting up S3 event notifications for object lifecycle management Managing bucket policies, CORS configuration, and access controls Implementing retry mechanisms and error handling for S3 operations Testing S3 integrations with LocalStack for development environments Instructions Follow these steps to work with Amazon S3: Add Dependencies - Include S3 and optional Transfer Manager dependencies Create Client - Instantiate S3Client with region and credentials Create Bucket - Use createBucket() with unique name and configuration Upload Objects - Use putObject() for small files or Transfer Manager for large files Download Objects - Use getObject() with ResponseInputStream Generate Presigned URLs - Use S3Presigner for temporary access Configure Permissions - Set bucket policies and access controls Set Lifecycle Rules - Configure object expiration and transitions Dependencies < dependency

< groupId

software.amazon.awssdk </ groupId

< artifactId

s3 </ artifactId

< version

2.20.0 </ version

// Use the latest stable version </ dependency

< dependency

< groupId

software.amazon.awssdk </ groupId

< artifactId

s3-transfer-manager </ artifactId

< version

2.20.0 </ version

// Use the latest stable version </ dependency

<
dependency
>
<
groupId
>
software.amazon.awssdk
</
groupId
>
<
artifactId
>
netty-nio-client
</
artifactId
>
<
version
>
2.20.0
</
version
>
// Use the latest stable version
</
dependency
>
Client Setup
Basic Synchronous Client
import
software
.
amazon
.
awssdk
.
regions
.
Region
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
S3Client
;
S3Client
s3Client
=
S3Client
.
builder
(
)
.
region
(
Region
.
US_EAST_1
)
.
build
(
)
;
Basic Asynchronous Client
import
software
.
amazon
.
awssdk
.
services
.
s3
.
S3AsyncClient
;
S3AsyncClient
s3AsyncClient
=
S3AsyncClient
.
builder
(
)
.
region
(
Region
.
US_EAST_1
)
.
build
(
)
;
Configured Client with Retry Logic
import
software
.
amazon
.
awssdk
.
http
.
apache
.
ApacheHttpClient
;
import
software
.
amazon
.
awssdk
.
core
.
retry
.
RetryPolicy
;
import
software
.
amazon
.
awssdk
.
core
.
retry
.
backoff
.
ExponentialRetryBackoff
;
import
java
.
time
.
Duration
;
S3Client
s3Client
=
S3Client
.
builder
(
)
.
region
(
Region
.
US_EAST_1
)
.
httpClientBuilder
(
ApacheHttpClient
.
builder
(
)
.
maxConnections
(
200
)
.
connectionTimeout
(
Duration
.
ofSeconds
(
5
)
)
)
.
overrideConfiguration
(
b
->
b
.
apiCallTimeout
(
Duration
.
ofSeconds
(
60
)
)
.
apiCallAttemptTimeout
(
Duration
.
ofSeconds
(
30
)
)
.
retryPolicy
(
RetryPolicy
.
builder
(
)
.
numRetries
(
3
)
.
retryBackoffStrategy
(
ExponentialRetryBackoff
.
builder
(
)
.
baseDelay
(
Duration
.
ofSeconds
(
1
)
)
.
maxBackoffTime
(
Duration
.
ofSeconds
(
30
)
)
.
build
(
)
)
.
build
(
)
)
)
.
build
(
)
;
Basic Bucket Operations
Create Bucket
import
software
.
amazon
.
awssdk
.
services
.
s3
.
model
.
*
;
import
java
.
util
.
concurrent
.
CompletableFuture
;
public
void
createBucket
(
S3Client
s3Client
,
String
bucketName
)
{
try
{
CreateBucketRequest
request
=
CreateBucketRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
build
(
)
;
s3Client
.
createBucket
(
request
)
;
// Wait until bucket is ready
HeadBucketRequest
waitRequest
=
HeadBucketRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
build
(
)
;
s3Client
.
waiter
(
)
.
waitUntilBucketExists
(
waitRequest
)
;
System
.
out
.
println
(
"Bucket created successfully: "
+
bucketName
)
;
}
catch
(
S3Exception
e
)
{
System
.
err
.
println
(
"Error creating bucket: "
+
e
.
awsErrorDetails
(
)
.
errorMessage
(
)
)
;
throw
e
;
}
}
List All Buckets
public
List
<
String
>
listAllBuckets
(
S3Client
s3Client
)
{
ListBucketsResponse
response
=
s3Client
.
listBuckets
(
)
;
return
response
.
buckets
(
)
.
stream
(
)
.
map
(
Bucket
::
name
)
.
collect
(
Collectors
.
toList
(
)
)
;
}
Check if Bucket Exists
public
boolean
bucketExists
(
S3Client
s3Client
,
String
bucketName
)
{
try
{
HeadBucketRequest
request
=
HeadBucketRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
build
(
)
;
s3Client
.
headBucket
(
request
)
;
return
true
;
}
catch
(
NoSuchBucketException
e
)
{
return
false
;
}
}
Basic Object Operations
Upload File to S3
import
software
.
amazon
.
awssdk
.
core
.
sync
.
RequestBody
;
import
java
.
nio
.
file
.
Paths
;
public
void
uploadFile
(
S3Client
s3Client
,
String
bucketName
,
String
key
,
String
filePath
)
{
PutObjectRequest
request
=
PutObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
build
(
)
;
s3Client
.
putObject
(
request
,
RequestBody
.
fromFile
(
Paths
.
get
(
filePath
)
)
)
;
System
.
out
.
println
(
"File uploaded: "
+
key
)
;
}
Download File from S3
import
software
.
amazon
.
awssdk
.
core
.
ResponseInputStream
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
model
.
GetObjectResponse
;
import
java
.
nio
.
file
.
Paths
;
public
void
downloadFile
(
S3Client
s3Client
,
String
bucketName
,
String
key
,
String
destPath
)
{
GetObjectRequest
request
=
GetObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
build
(
)
;
s3Client
.
getObject
(
request
,
Paths
.
get
(
destPath
)
)
;
System
.
out
.
println
(
"File downloaded: "
+
destPath
)
;
}
Get Object Metadata
public
Map
<
String
,
String
>
getObjectMetadata
(
S3Client
s3Client
,
String
bucketName
,
String
key
)
{
HeadObjectRequest
request
=
HeadObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
build
(
)
;
HeadObjectResponse
response
=
s3Client
.
headObject
(
request
)
;
return
response
.
metadata
(
)
;
}
Advanced Object Operations
Upload with Metadata and Encryption
public
void
uploadWithMetadata
(
S3Client
s3Client
,
String
bucketName
,
String
key
,
String
filePath
,
Map
<
String
,
String
>
metadata
)
{
PutObjectRequest
request
=
PutObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
metadata
(
metadata
)
.
contentType
(
"application/pdf"
)
.
serverSideEncryption
(
ServerSideEncryption
.
AES256
)
.
storageClass
(
StorageClass
.
STANDARD_IA
)
.
build
(
)
;
PutObjectResponse
response
=
s3Client
.
putObject
(
request
,
RequestBody
.
fromFile
(
Paths
.
get
(
filePath
)
)
)
;
System
.
out
.
println
(
"Upload completed. ETag: "
+
response
.
eTag
(
)
)
;
}
Copy Object Between Buckets
public
void
copyObject
(
S3Client
s3Client
,
String
sourceBucket
,
String
sourceKey
,
String
destBucket
,
String
destKey
)
{
CopyObjectRequest
request
=
CopyObjectRequest
.
builder
(
)
.
sourceBucket
(
sourceBucket
)
.
sourceKey
(
sourceKey
)
.
destinationBucket
(
destBucket
)
.
destinationKey
(
destKey
)
.
build
(
)
;
s3Client
.
copyObject
(
request
)
;
System
.
out
.
println
(
"Object copied: "
+
sourceKey
+
" -> "
+
destKey
)
;
}
Delete Multiple Objects
public
void
deleteMultipleObjects
(
S3Client
s3Client
,
String
bucketName
,
List
<
String
>
keys
)
{
List
<
ObjectIdentifier
>
objectIds
=
keys
.
stream
(
)
.
map
(
key
->
ObjectIdentifier
.
builder
(
)
.
key
(
key
)
.
build
(
)
)
.
collect
(
Collectors
.
toList
(
)
)
;
Delete
delete
=
Delete
.
builder
(
)
.
objects
(
objectIds
)
.
build
(
)
;
DeleteObjectsRequest
request
=
DeleteObjectsRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
delete
(
delete
)
.
build
(
)
;
DeleteObjectsResponse
response
=
s3Client
.
deleteObjects
(
request
)
;
response
.
deleted
(
)
.
forEach
(
deleted
->
System
.
out
.
println
(
"Deleted: "
+
deleted
.
key
(
)
)
)
;
response
.
errors
(
)
.
forEach
(
error
->
System
.
err
.
println
(
"Failed to delete "
+
error
.
key
(
)
+
": "
+
error
.
message
(
)
)
)
;
}
Presigned URLs
Generate Download URL
import
software
.
amazon
.
awssdk
.
services
.
s3
.
presigner
.
S3Presigner
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
presigner
.
model
.
*
;
import
java
.
time
.
Duration
;
public
String
generateDownloadUrl
(
String
bucketName
,
String
key
)
{
try
(
S3Presigner
presigner
=
S3Presigner
.
builder
(
)
.
region
(
Region
.
US_EAST_1
)
.
build
(
)
)
{
GetObjectRequest
getObjectRequest
=
GetObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
build
(
)
;
GetObjectPresignRequest
presignRequest
=
GetObjectPresignRequest
.
builder
(
)
.
signatureDuration
(
Duration
.
ofMinutes
(
10
)
)
.
getObjectRequest
(
getObjectRequest
)
.
build
(
)
;
PresignedGetObjectRequest
presignedRequest
=
presigner
.
presignGetObject
(
presignRequest
)
;
return
presignedRequest
.
url
(
)
.
toString
(
)
;
}
}
Generate Upload URL
public
String
generateUploadUrl
(
String
bucketName
,
String
key
)
{
try
(
S3Presigner
presigner
=
S3Presigner
.
create
(
)
)
{
PutObjectRequest
putObjectRequest
=
PutObjectRequest
.
builder
(
)
.
bucket
(
bucketName
)
.
key
(
key
)
.
build
(
)
;
PutObjectPresignRequest
presignRequest
=
PutObjectPresignRequest
.
builder
(
)
.
signatureDuration
(
Duration
.
ofMinutes
(
5
)
)
.
putObjectRequest
(
putObjectRequest
)
.
build
(
)
;
PresignedPutObjectRequest
presignedRequest
=
presigner
.
presignPutObject
(
presignRequest
)
;
return
presignedRequest
.
url
(
)
.
toString
(
)
;
}
}
S3 Transfer Manager
Upload with Transfer Manager
import
software
.
amazon
.
awssdk
.
transfer
.
s3
.
*
;
import
software
.
amazon
.
awssdk
.
transfer
.
s3
.
model
.
*
;
public
void
uploadWithTransferManager
(
String
bucketName
,
String
key
,
String
filePath
)
{
try
(
S3TransferManager
transferManager
=
S3TransferManager
.
create
(
)
)
{
UploadFileRequest
uploadRequest
=
UploadFileRequest
.
builder
(
)
.
putObjectRequest
(
req
->
req
.
bucket
(
bucketName
)
.
key
(
key
)
)
.
source
(
Paths
.
get
(
filePath
)
)
.
build
(
)
;
FileUpload
upload
=
transferManager
.
uploadFile
(
uploadRequest
)
;
// Monitor progress
upload
.
progressFuture
(
)
.
thenAccept
(
progress
->
{
System
.
out
.
println
(
"Upload progress: "
+
progress
.
progressPercent
(
)
+
"%"
)
;
}
)
;
CompletedFileUpload
result
=
upload
.
completionFuture
(
)
.
join
(
)
;
System
.
out
.
println
(
"Upload complete. ETag: "
+
result
.
response
(
)
.
eTag
(
)
)
;
}
}
Download with Transfer Manager
public
void
downloadWithTransferManager
(
String
bucketName
,
String
key
,
String
destPath
)
{
try
(
S3TransferManager
transferManager
=
S3TransferManager
.
create
(
)
)
{
DownloadFileRequest
downloadRequest
=
DownloadFileRequest
.
builder
(
)
.
getObjectRequest
(
req
->
req
.
bucket
(
bucketName
)
.
key
(
key
)
)
.
destination
(
Paths
.
get
(
destPath
)
)
.
build
(
)
;
FileDownload
download
=
transferManager
.
downloadFile
(
downloadRequest
)
;
CompletedFileDownload
result
=
download
.
completionFuture
(
)
.
join
(
)
;
System
.
out
.
println
(
"Download complete. Size: "
+
result
.
response
(
)
.
contentLength
(
)
)
;
}
}
Spring Boot Integration
Configuration Properties
import
org
.
springframework
.
boot
.
context
.
properties
.
ConfigurationProperties
;
@ConfigurationProperties
(
prefix
=
"aws.s3"
)
public
class
S3Properties
{
private
String
accessKey
;
private
String
secretKey
;
private
String
region
=
"us-east-1"
;
private
String
endpoint
;
private
String
defaultBucket
;
private
boolean
asyncEnabled
=
false
;
private
boolean
transferManagerEnabled
=
true
;
// Getters and setters
public
String
getAccessKey
(
)
{
return
accessKey
;
}
public
void
setAccessKey
(
String
accessKey
)
{
this
.
accessKey
=
accessKey
;
}
// ... other getters and setters
}
S3 Configuration Class
import
org
.
springframework
.
context
.
annotation
.
Bean
;
import
org
.
springframework
.
context
.
annotation
.
Configuration
;
import
software
.
amazon
.
awssdk
.
auth
.
credentials
.
AwsBasicCredentials
;
import
software
.
amazon
.
awssdk
.
auth
.
credentials
.
StaticCredentialsProvider
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
S3Client
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
S3AsyncClient
;
import
software
.
amazon
.
awssdk
.
regions
.
Region
;
import
java
.
net
.
URI
;
@Configuration
public
class
S3Configuration
{
private
final
S3Properties
properties
;
public
S3Configuration
(
S3Properties
properties
)
{
this
.
properties
=
properties
;
}
@Bean
public
S3Client
s3Client
(
)
{
S3Client
.
Builder
builder
=
S3Client
.
builder
(
)
.
region
(
Region
.
of
(
properties
.
getRegion
(
)
)
)
;
if
(
properties
.
getAccessKey
(
)
!=
null
&&
properties
.
getSecretKey
(
)
!=
null
)
{
builder
.
credentialsProvider
(
StaticCredentialsProvider
.
create
(
AwsBasicCredentials
.
create
(
properties
.
getAccessKey
(
)
,
properties
.
getSecretKey
(
)
)
)
)
;
}
if
(
properties
.
getEndpoint
(
)
!=
null
)
{
builder
.
endpointOverride
(
URI
.
create
(
properties
.
getEndpoint
(
)
)
)
;
}
return
builder
.
build
(
)
;
}
@Bean
public
S3AsyncClient
s3AsyncClient
(
)
{
S3AsyncClient
.
Builder
builder
=
S3AsyncClient
.
builder
(
)
.
region
(
Region
.
of
(
properties
.
getRegion
(
)
)
)
;
if
(
properties
.
getAccessKey
(
)
!=
null
&&
properties
.
getSecretKey
(
)
!=
null
)
{
builder
.
credentialsProvider
(
StaticCredentialsProvider
.
create
(
AwsBasicCredentials
.
create
(
properties
.
getAccessKey
(
)
,
properties
.
getSecretKey
(
)
)
)
)
;
}
if
(
properties
.
getEndpoint
(
)
!=
null
)
{
builder
.
endpointOverride
(
URI
.
create
(
properties
.
getEndpoint
(
)
)
)
;
}
return
builder
.
build
(
)
;
}
@Bean
public
S3TransferManager
s3TransferManager
(
)
{
return
S3TransferManager
.
builder
(
)
.
s3Client
(
s3Client
(
)
)
.
build
(
)
;
}
}
S3 Service
import
org
.
springframework
.
stereotype
.
Service
;
import
software
.
amazon
.
awssdk
.
transfer
.
s3
.
S3TransferManager
;
import
software
.
amazon
.
awssdk
.
services
.
s3
.
model
.
*
;
import
java
.
nio
.
file
.
*
;
import
java
.
util
.
*
;
import
java
.
util
.
concurrent
.
CompletableFuture
;
@Service
@RequiredArgsConstructor
public
class
S3Service
{
private
final
S3Client
s3Client
;
private
final
S3AsyncClient
s3AsyncClient
;
private
final
S3TransferManager
transferManager
;
private
final
S3Properties
properties
;
public
CompletableFuture
<
Void
>
uploadFileAsync
(
String
key
,
Path
file
)
{
PutObjectRequest
request
=
PutObjectRequest
.
builder
(
)
.
bucket
(
properties
.
getDefaultBucket
(
)
)
.
key
(
key
)
.
build
(
)
;
return
CompletableFuture
.
runAsync
(
(
)
->
{
s3Client
.
putObject
(
request
,
RequestBody
.
fromFile
(
file
)
)
;
}
)
;
}
public
CompletableFuture
<
byte
[
]
>
downloadFileAsync
(
String
key
)
{
GetObjectRequest
request
=
GetObjectRequest
.
builder
(
)
.
bucket
(
properties
.
getDefaultBucket
(
)
)
.
key
(
key
)
.
build
(
)
;
return
CompletableFuture
.
supplyAsync
(
(
)
->
{
try
(
ResponseInputStream
<
GetObjectResponse
>
response
=
s3Client
.
getObject
(
request
)
)
{
return
response
.
readAllBytes
(
)
;
}
catch
(
IOException
e
)
{
throw
new
RuntimeException
(
"Failed to read S3 object"
,
e
)
;
}
}
)
;
}
public
CompletableFuture
<
String
>
generatePresignedUrl
(
String
key
,
Duration
duration
)
{
return
CompletableFuture
.
supplyAsync
(
(
)
->
{
try
(
S3Presigner
presigner
=
S3Presigner
.
builder
(
)
.
region
(
Region
.
of
(
properties
.
getRegion
(
)
)
)
.
build
(
)
)
{
GetObjectRequest
getRequest
=
GetObjectRequest
.
builder
(
)
.
bucket
(
properties
.
getDefaultBucket
(
)
)
.
key
(
key
)
.
build
(
)
;
GetObjectPresignRequest
presignRequest
=
GetObjectPresignRequest
.
builder
(
)
.
signatureDuration
(
duration
)
.
getObjectRequest
(
getRequest
)
.
build
(
)
;
return
presigner
.
presignGetObject
(
presignRequest
)
.
url
(
)
.
toString
(
)
;
}
}
)
;
}
public
Flux
<
S3Object
>
listObjects
(
String
prefix
)
{
ListObjectsV2Request
request
=
ListObjectsV2Request
.
builder
(
)
.
bucket
(
properties
.
getDefaultBucket
(
)
)
.
prefix
(
prefix
)
.
build
(
)
;
return
Flux
.
create
(
sink
->
{
s3Client
.
listObjectsV2Paginator
(
request
)
.
contents
(
)
.
forEach
(
sink
::
next
)
;
sink
.
complete
(
)
;
}
)
;
}
}
Examples
Basic File Upload Example
public
class
S3UploadExample
{
public
static
void
main
(
String
[
]
args
)
{
// Initialize client
S3Client
s3Client
=
S3Client
.
builder
(
)
.
region
(
Region
.
US_EAST_1
)
.
build
(
)
;
String
bucketName
=
"my-example-bucket"
;
String
filePath
=
"document.pdf"
;
String
key
=
"uploads/document.pdf"
;
// Create bucket if it doesn't exist
if
(
!
bucketExists
(
s3Client
,
bucketName
)
)
{
createBucket
(
s3Client
,
bucketName
)
;
}
// Upload file
Map
<
String
,
String
>
metadata
=
Map
.
of
(
"author"
,
"John Doe"
,
"content-type"
,
"application/pdf"
,
"upload-date"
,
java
.
time
.
LocalDate
.
now
(
)
.
toString
(
)
)
;
uploadWithMetadata
(
s3Client
,
bucketName
,
key
,
filePath
,
metadata
)
;
// Generate presigned URL
String
downloadUrl
=
generateDownloadUrl
(
bucketName
,
key
)
;
System
.
out
.
println
(
"Download URL: "
+
downloadUrl
)
;
// Close client
s3Client
.
close
(
)
;
}
}
Batch File Processing Example
import
java
.
nio
.
file
.
*
;
import
java
.
util
.
stream
.
*
;
public
class
S3BatchProcessing
{
public
void
processDirectoryUpload
(
S3Client
s3Client
,
String
bucketName
,
String
directoryPath
)
{
try
(
Stream
<
Path
>
paths
=
Files
.
walk
(
Paths
.
get
(
directoryPath
)
)
)
{
List
<
CompletableFuture
<
Void
>
>
futures
=
paths
.
filter
(
Files
::
isRegularFile
)
.
map
(
path
->
{
String
key
=
bucketName
+
"/"
+
path
.
getFileName
(
)
.
toString
(
)
;
return
CompletableFuture
.
runAsync
(
(
)
->
{
uploadFile
(
s3Client
,
bucketName
,
key
,
path
.
toString
(
)
)
;
}
)
;
}
)
.
collect
(
Collectors
.
toList
(
)
)
;
// Wait for all uploads to complete
CompletableFuture
.
allOf
(
futures
.
toArray
(
new
CompletableFuture
[
0
]
)
)
.
join
(
)
;
System
.
out
.
println
(
"All files uploaded successfully"
)
;
}
catch
(
IOException
e
)
{
throw
new
RuntimeException
(
"Failed to process directory"
,
e
)
;
}
}
}
Best Practices
Performance Optimization
Use S3 Transfer Manager
Automatically handles multipart uploads, parallel transfers, and progress tracking for files >100MB
Reuse S3 Client
Clients are thread-safe and should be reused throughout the application lifecycle
Enable async operations
Use S3AsyncClient for I/O-bound operations to improve throughput
Configure proper timeouts
Set appropriate timeouts for large file operations
Use connection pooling
Configure HTTP client for optimal connection management
Security Considerations
Use temporary credentials
Always use IAM roles or AWS STS for short-lived access tokens
Enable server-side encryption
Use AES-256 or AWS KMS for sensitive data
Implement access controls
Use bucket policies and IAM roles instead of access keys in production
Validate object metadata
Sanitize user-provided metadata to prevent header injection
Use presigned URLs
Avoid exposing credentials by using temporary access URLs
Error Handling
Implement retry logic
Network operations should have exponential backoff retry strategies
Handle throttling
Implement proper handling of 429 Too Many Requests responses
Validate object existence
Check if objects exist before operations that require them
Clean up failed operations
Abort multipart uploads that fail
Log appropriately
Log successful operations and errors for monitoring
Cost Optimization
Use appropriate storage classes
Choose STANDARD, STANDARD_IA, INTELLIGENT_TIERING based on access patterns
Implement lifecycle policies
Automatically transition or expire objects
Enable object versioning
For important data that needs retention
Monitor usage
Track data transfer and storage costs
Minimize API calls
Use batch operations when possible
Constraints and Limitations
File size limits
Single PUT operations limited to 5GB; use multipart uploads for larger files
Batch operations
Maximum 1000 objects per DeleteObjects operation
Metadata size
User-defined metadata limited to 2KB
Concurrent transfers
Transfer Manager handles up to 100 concurrent transfers by default
Region consistency
Cross-region operations may incur additional costs and latency
S3 eventual consistency
New objects might not be immediately visible after upload References For more detailed information, see: AWS S3 Object Operations Reference S3 Transfer Manager Patterns Spring Boot Integration Guide AWS S3 Developer Guide AWS SDK for Java 2.x S3 API
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