Spring REST不能从MultiPartHttpServletRequest获取文件

Spring REST not getting files from MultiPartHttpServletRequest

本文关键字：获取 文件 MultiPartHttpServletRequest REST 不能 Spring      更新时间：2023-09-26

我正在尝试通过Angular 1.5上传文件到Spring REST端点。

我没有得到任何错误，因为multiPartRequest.getFileNames();返回null。然而，我的JS POST似乎正确地通过了请求。

然而，我似乎无法解决它。我已经看了几个小时了，需要有人指出我错过的明显的东西。

任何帮助，建议都是感激的。

POST请求示例:

Accept:application/json, text/plain, */*
Accept-Encoding:gzip, deflate
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Content-Length:50188
Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryIPlVKLnf1ZIQNPHV
Host:localhost:8080
Origin:http://127.0.0.1:49693
Referer:http://127.0.0.1:49693/test.html
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36
Request Payload
------WebKitFormBoundaryIPlVKLnf1ZIQNPHV
Content-Disposition: form-data; name="file"; filename="post-image1.jpg"
Content-Type: image/jpeg

------WebKitFormBoundaryIPlVKLnf1ZIQNPHV--
Name

我使用下面的HTML

                <form enctype="multipart/form-data">                     
                        <input type="file" name="file" onchange="angular.element(this).scope().upload(this.files)"/>
                        <button type="submit">Upload</button>
                        <li ng-repeat="file in files">{{file.name}}</li>
                </form>

使用以下JS

$scope.upload = function(files) {
            var fd = new FormData();
            //Take the first selected file
            fd.append("file", files[0]);
            $http.post('uploadURL', fd, {
                withCredentials: true,
                headers: {'Content-Type': undefined },
                transformRequest: angular.identity
            })
             .success(function(d) {
                     console.log("Upload complete" +d);
            })
        };

和下面的REST端点

@RequestMapping(value="/upload", method=RequestMethod.POST)
    public String upload (HttpServletResponse response, HttpServletRequest request) {
        MultipartHttpServletRequest multiPartRequest = (MultipartHttpServletRequest) request;
        Iterator<String> it = multiPartRequest.getFileNames();
        while (it.hasNext()) {
            MultipartFile multiPartFile = multiPartRequest.getFile(it.next());
            String filename = multiPartFile.getOriginalFilename();
            imageName = filename;
            String path = new File("src/main/resources/images").getAbsolutePath() + "/" + filename;
            try {
                multiPartFile.transferTo(new File(path));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

试着这样做

@RequestMapping(value="/upload", method=RequestMethod.POST)
public String upload(MultipartHttpServletRequest request,
        HttpServletResponse response) {
(...)

我也有同样的问题，我通过将<button type="submit">Upload</button>更改为<input type="submit">来解决它

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