Spring Boot File Upload Download

File Handling Services

Secure file upload/download with validation.

File Upload Controller

@PostMapping("/upload")
public ResponseEntity uploadFile(
    @RequestParam("file") MultipartFile file,
    @RequestParam("category") String category) {
    
    if (!file.isEmpty() && file.getSize() < 10_000_000) {
        String filename = storageService.store(file);
        return ResponseEntity.ok(filename);
    }
}

Security Features

• File type validation
• Size limits (10MB)
• Antivirus scanning integration
• S3 direct upload