Provides Amazon S3 patterns and examples using AWS SDK for Java 2.x. Use when working with S3 buckets, uploading/downloading objects, multipart uploads, presigned URLs, S3 Transfer Manager, object operations, or S3-specific configurations.

AWS SDK for Java 2.x Amazon S3 Overview Provides patterns for S3 operations: bucket management, object upload/download with multipart support, presigned URLs, S3 Transfer Manager, and S3 specific configurations using AWS SDK for Java 2.x. When to Use 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 Quick Reference Operation Method Notes Create bucket createBucket() Wait with waiter().waitUntilBucketExists() Upload object putObject() Use RequestBody.fromFile() Download object getObject() Streams to file or memory Delete objects deleteObjects() Batch up to 1000 keys Presigned URL presigner.presignGetObject() Max 7 days expiration Storage Classes Class Use Case STANDARD Frequently accessed data STANDARD IA Infrequently accessed data GLACIER Long term archive INTELLIGENT TIERING Automatic cost optimization Instructions 1. Add Dependencies 2. Create S3 Client 3. Create Bucket 4. Upload Object 5. Download Object 6. Generate Presigned URL 7. Use Transfer Manager (Large Files) Best Practices Performance Use S3 Transfer Manager : Automatic multipart uploads for files 100MB Reuse S3 Client : Clients are thread safe; reuse throughout application Enable async operations : Use S3AsyncClient for I/O bound operations Configure timeouts : Set appropriate timeouts for large file operations Security Use temporary credentials : IAM roles or AWS STS for short lived tokens Enable encryption : Use AES 256 or AWS KMS for sensitive data Use presigned URLs : Avoid exposing credentials with temporary access Validate metadata : Sanitize user provided metadata Error Handling Implement retry logic : Exponential backoff for network operations Handle throttling : Proper handling of 429 responses Clean up failures : Abort failed multipart uploads Cost Optimization Use appropriate storage classes : STANDARD, STANDARD IA, INTELLIGENT TIERING Implement lifecycle policies : Automatic transition/expiration Minimize API calls : Use batch operations when possible Constraints and Warnings Object Size : Single PUT limited to 5GB; use multipart for larger files Bucket Names : Must be globally unique across all AWS accounts Object Immutability : Objects cannot be modified; must be replaced entirely Eventual Consistency : List operations may have slight delays after uploads Presigned URLs : Maximum expiration time is 7 days Multipart Uploads : Parts must be at least 5MB except last part Examples Complete Upload Workflow with Validation Multipart Upload with Abort on Failure References [references/s3 client setup.md](references/s3 client setup.md) — Client configuration and basic operations [references/s3 object operations.md](references/s3 object operations.md) — Advanced object operations [references/s3 transfer patterns.md](references/s3 transfer patterns.md) — Transfer Manager and multipart uploads [references/s3 spring boot integration.md](references/s3 spring boot integration.md) — Spring Boot integration patterns [AWS S3 Developer Guide](https://docs.aws.amazon.com/AmazonS3/latest/userguide/) [AWS SDK for Java 2.x S3 API](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/s3/package summary.html) Related Skills aws sdk java v2 core Core AWS SDK patterns and configuration spring boot dependency injection Spring dependency injection patterns

aws-sdk-java-v2-s3