Spring Boot Amazon AWS S3 存储桶文件下载 - 访问被拒绝

使用Spring Boot Amazon AWS S3存储桶下载文件 - 访问被拒绝

java
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.S3Object;
import java.io.File;
@RestController
public class S3Controller {
    private final AmazonS3 amazonS3;
    public S3Controller(AmazonS3 amazonS3) {
        this.amazonS3 = amazonS3;
    }
    @GetMapping("/download/{fileName:.+}")
    public ResponseEntity downloadFile(@PathVariable String fileName) {
        S3Object s3Object = amazonS3.getObject("bucketName", fileName);
        S3ObjectInputStream inputStream = s3Object.getObjectContent();
        File file = convertS3ObjectToFile(s3Object, fileName);
        Resource resource = new FileSystemResource(file);
        return ResponseEntity.ok()
                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + fileName + "\"")
                .body(resource);
    }
    private File convertS3ObjectToFile(S3Object s3Object, String fileName) {
        File file = new File(fileName);
        try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
            IOUtils.copy(s3Object.getObjectContent(), fileOutputStream);
        } catch (IOException e) {
            throw new RuntimeException("Failed to convert S3 object to file", e);
        }
        return file;
    }
}