如何在Spring Boot @ResponseBody中返回404响应状态-方法返回类型为Response? [英] How to return 404 response status in Spring Boot @ResponseBody - method return type is Response?

问题描述

我将Spring Boot与基于@ResponseBody的方法结合使用，如下所示:

I'm using Spring Boot with @ResponseBody based approach like the following:

@RequestMapping(value = VIDEO_DATA_PATH, method = RequestMethod.GET)
public @ResponseBody Response getData(@PathVariable(ID_PARAMETER) long id, HttpServletResponse res) {
    Video video = null;
    Response response = null;
    video = videos.get(id - 1);
    if (video == null) {
      // TODO how to return 404 status
    }
    serveSomeVideo(video, res);
    VideoSvcApi client =  new RestAdapter.Builder()
            .setEndpoint("http://localhost:8080").build().create(VideoSvcApi.class);
    response = client.getData(video.getId());
    return response;
}

public void serveSomeVideo(Video v, HttpServletResponse response) throws IOException  {
    if (videoDataMgr == null) {
        videoDataMgr = VideoFileManager.get();
    }
    response.addHeader("Content-Type", v.getContentType());
    videoDataMgr.copyVideoData(v, response.getOutputStream());
    response.setStatus(200);
    response.addHeader("Content-Type", v.getContentType());
}

我尝试了一些典型的方法，例如:

I tried some typical approaches as:

res.setStatus(HttpStatus.NOT_FOUND.value());
新的ResponseEntity(HttpStatus.BAD_REQUEST);

res.setStatus(HttpStatus.NOT_FOUND.value());
new ResponseEntity(HttpStatus.BAD_REQUEST);

但是我需要返回响应.

如果视频为空，如何在此处返回404状态代码?

How to return here 404 status code if video is null?

推荐答案

创建带有@ResponseStatus(HttpStatus.NOT_FOUND)批注的NotFoundException类，并将其从控制器中抛出.

Create a NotFoundException class with an @ResponseStatus(HttpStatus.NOT_FOUND) annotation and throw it from your controller.

@ResponseStatus(code = HttpStatus.NOT_FOUND, reason = "video not found")
public class VideoNotFoundException extends RuntimeException {
}

这篇关于如何在Spring Boot @ResponseBody中返回404响应状态-方法返回类型为Response?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！