How to implement asynchronous file uploading in Spring Boot?

You can achieve asynchronous file upload in Spring Boot by using the @Async annotation. Below is a simple example code:

1. First, create a controller to handle file upload requests.

@RestController
public class FileUploadController {

    @Autowired
    private FileStorageService fileStorageService;

    @PostMapping("/upload")
    public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
        fileStorageService.uploadFile(file);
        return ResponseEntity.ok("File uploaded successfully!");
    }
}

1. Next, create a Service to handle file upload logic.

@Service
public class FileStorageService {

    @Async
    public void uploadFile(MultipartFile file) {
        // 上传文件的逻辑
        // 这里可以调用其他Service或者使用Spring提供的ResourceLoader来保存文件
    }
}

1. Configure the thread pool in the application.properties file.

spring.task.execution.pool.core-size=5
spring.task.execution.pool.max-size=20
spring.task.execution.pool.queue-capacity=100

In the example above, the uploadFile method will be executed asynchronously when a file upload request arrives, without blocking the main thread. This can improve the system’s ability to handle concurrency.