AngularJS Formdata文件数组上传 [英] AngularJS Formdata file array upload

问题描述

我正在尝试一次性上传（实际上是POST）多个小文件以及一些键值对：

I'm trying to upload (actually POST) numerous small files in one go along with some key, value pairs:

                $scope.uploadFiles = function(files) {

                    if (files.length === 0) {
                        return;
                    }

                    var formData = new FormData();
                    formData.append('keyName1', 'keyValue1');
                    formData.append('keyName2', 'keyValue2');
                    formData.append('keyName3', 'keyValue3');
                    for (var i = 0; i < files.length; i++) {
                        formData.append('files[]', files[i]);
                    }

                    $http.post( '/myEndpoint', formData, {
                        headers: { 'Content-Type': undefined },
                        transformRequest: angular.identity
                    }).success(function (result) {
                        console.log('YAY');
                    }).error(function () {
                        console.log('NAY');
                    });                 
                }

这是Java后端：

@RequestMapping(value = "/myEndpoint", method = RequestMethod.POST)
@ResponseBody
public void uploadFiles(
        @RequestParam("files") List<MultipartFile> fileList,
        @RequestParam("keyName1") String keyName1,
        @RequestParam("keyName2") String keyName2,
        @RequestParam("keyName3") String keyName3,
        HttpServletResponse response, HttpSession session) throws Exception {

    log.debug(fileList.size()); // Always logs zero
}

端点被命中但filesList长度为零。我也改变了

The endpoint is being hit but the filesList length is zero. I've also changed

    List<MultipartFile> fileList to MultipartFile[] filesArray

但这不起作用。

有人可以解决一些问题吗？

Can anyone shed some light please?

干杯，

保罗

推荐答案

这可能对您有所帮助。

This might be helpful to you.

Angular：

$scope.uploadFiles = function(files) {
    if (files.length === 0) {
        return;
    }

    var formData = new FormData();
    formData.append('keyName1', 'keyValue1');
    formData.append('keyName2', 'keyValue2');
    formData.append('keyName3', 'keyValue3');
    for (var i = 0; i < files.length; i++) {
        formData.append('file'+i, files[i]);
    }

    $http.post( '/myEndpoint', formData, {
        headers: { 'Content-Type': undefined },
        transformRequest: angular.identity
    }).success(function (result) {
        console.log('YAY');
    }).error(function () {
        console.log('NAY');
    });                 
}

在Spring / Java Side：

On Spring/Java Side:

RequestMapping(value = "/myEndpoint", method = RequestMethod.POST)
public @ResponseBody Object uploadFiles(MultipartHttpServletRequest request, HttpServletResponse response) throws IOException {
    //do stuff here...
    final String keyName1= request.getParameter('keyName1');
    //and so on......

    Iterator<String> iterator = request.getFileNames();
    MultipartFile multipartFile = null;
    while (iterator.hasNext()) {
        multipartFile = request.getFile(iterator.next());
        //do something with the file.....
    }
}

顺便说一句，在您有意义的一面，您可以随时结束文件或多次请求。这取决于你想要实现的方式。

BTW, on you angular side, you can always end the file on one go or with multiple request. It's up to you how you want that implemented.

这篇关于AngularJS Formdata文件数组上传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！