Question

我有上传图片的帖子请求如下：

@RequestMapping(method = RequestMethod.POST, value = BASE_PATH)
public ResponseEntity<?> createFile(@RequestParam("file") MultipartFile file, HttpServletRequest servletRequest){

    URI localUri = null;
    try{
        imageService.createImage(file);
        final URI localhostUri = new URI(servletRequest.getRequestURL().toString() + "/")
                                        .resolve(file.getOriginalFilename() + "/raw");

        localUri = localhostUri;

    }catch (IOException e){
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                        .body("Could not upload " + file.getOriginalFilename() + "=>" + e.getMessage());
    }catch (URISyntaxException e) {
        e.printStackTrace();
    }
    return ResponseEntity.created(localUri)
            .body("Successfully Uploaded " + file.getOriginalFilename());
}

以下是一次获取图像的GET方法：

@RequestMapping(method = RequestMethod.GET, value = BASE_PATH + "/" + FILENAME + "/raw")
@ResponseBody
public ResponseEntity<?> oneRawImage(@PathVariable String filename){

    try{
        Resource file = imageService.findOneImage(filename);
        return ResponseEntity.ok()
                .contentLength(file.contentLength())
                .contentType(MediaType.IMAGE_JPEG)
                .body(new InputStreamResource(file.getInputStream()));
    }catch (IOException e){
        return ResponseEntity.badRequest()
                            .body("Couldn't Find" + filename + "=>" + e.getMessage());
    }

}

当我执行POST时，我得到一个正确的响应，说明文件已上传（我不确定它是否是，因为返回请求不在try块中。以下是我得到的响应：

*   Trying ::1...
* Connected to localhost (::1) port 8080 (#0)
> POST /images HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.49.0
> Accept: */*
> Content-Length: 69927
> Expect: 100-continue
> Content-Type: multipart/form-data; boundary=------------------------
b5f1ef58e19bbb8d
> 
< HTTP/1.1 100 
< HTTP/1.1 201 
< Location: http://localhost:8080/images/image2.jpg/raw
< Content-Type: text/plain;charset=UTF-8
< Content-Length: 32
< Date: Wed, 14 Jun 2017 18:24:06 GMT
< 
* Connection #0 to host localhost left intact
Successfully Uploaded image2.jpg

但是当我尝试执行GET请求以获取我发布的图像时，我收到以下错误：

Couldn't Findimage2.jpg=>ServletContext resource [/fileupload-dir/image2.jpg] cannot be resolved to URL because it does not exist

我尝试了多种方式的调试，但没有成功。任何springers的帮助将不胜感激！感谢

Answer 1

所以我意识到这个问题非常琐碎。被调用的服务方法：

public Resource findOneImage(String filename){
    return resourceLoader.getResource("file:" + UPLOAD_ROOT + "/" + filename);
}

'文件'中缺少冒号。因此，resourceLoader没有被解析为正确的URL。

Spring Boot GET请求返回400图像

1 个答案: