Spring Boot上传文件并将其作为静态资源提供

@RestController
public class FileUploadController {

    @Value("${upload.path}")
    private String uploadPath;

    @PostMapping("/upload")
    public String uploadFile(@RequestParam("file") MultipartFile file) {
        try {
            // 保存文件到指定目录
            String fileName = file.getOriginalFilename();
            file.transferTo(new File(uploadPath + fileName));
            return "File uploaded successfully!";
        } catch (IOException e) {
            e.printStackTrace();
            return "File upload failed!";
        }
    }

    @GetMapping("/files/{fileName}")
    public ResponseEntity<Resource> serveFile(@PathVariable String fileName) {
        Resource file = new FileSystemResource(uploadPath + fileName);
        if (file.exists()) {
            return ResponseEntity.ok()
                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + file.getFilename() + "\"")
                    .body(file);
        } else {
            return ResponseEntity.notFound().build();
        }
    }
}