如何从Spring控制器返回视频？

import org.springframework.core.io.ClassPathResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;

@Controller
@RequestMapping("/video")
public class VideoController {

    @GetMapping("/play")
    public ResponseEntity<byte[]> playVideo() throws IOException {
        ClassPathResource videoFile = new ClassPathResource("path/to/video.mp4");
        byte[] videoData = Files.readAllBytes(videoFile.getFile().toPath());

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        headers.setContentDispositionFormData("attachment", "video.mp4");

        return ResponseEntity.ok()
                .headers(headers)
                .body(videoData);
    }

    @GetMapping("/stream")
    @ResponseBody
    public StreamingResponseBody streamVideo() throws IOException {
        ClassPathResource videoFile = new ClassPathResource("path/to/video.mp4");
        InputStream videoStream = videoFile.getInputStream();

        return outputStream -> {
            int nRead;
            byte[] data = new byte[1024];
            while ((nRead = videoStream.read(data, 0, data.length)) != -1) {
                outputStream.write(data, 0, nRead);
            }
            videoStream.close();
        };
    }
}