Właśnie spędziłem 2 godziny walcząc z Uploadem jQuery, ale zrezygnowałem z powodu ilości zależności (miałem 13 plików JS, aby uzyskać wszystkie dzwonki i gwizdki).

Trochę poszukałem i natknąłem się na fajny projekt o nazwie Dropzone.js , który nie ma żadnych zależności.

Autor stworzył również Bootstrap demo , który został zainspirowany wtyczką do przesyłania plików jQuery.

Mam nadzieję, że to oszczędzi komuś czasu.

Ja również zmagałem się z tym, ale dostałem to działa, gdy zorientowałem się, jak ścieżki działają w UploadHandler.php: upload_dir i upload_url są jedynymi ustawieniami, na które należy patrzeć, aby to działało. Sprawdź również dzienniki błędów serwera pod kątem debugowania informacji.

Sprawdź grafikę przeciągnij i upuść uploader z podglądem obrazu za pomocą dropper jQuery plugin.

HTML

<div class="target" width="78" height="100"><img /></div>

JS

$(".target").dropper({
    action: "upload.php",

}).on("start.dropper", onStart);
function onStart(e, files){
console.log(files[0]);

    image_preview(files[0].file).then(function(res){
$('.dropper-dropzone').empty();
//$('.dropper-dropzone').css("background-image",res.data);
 $('#imgPreview').remove();        
$('.dropper-dropzone').append('<img id="imgPreview"/><span style="display:none">Drag and drop files or click to select</span>');
var widthImg=$('.dropper-dropzone').attr('width');
        $('#imgPreview').attr({width:widthImg});
    $('#imgPreview').attr({src:res.data});

    })

}

function image_preview(file){
    var def = new $.Deferred();
    var imgURL = '';
    if (file.type.match('image.*')) {
        //create object url support
        var URL = window.URL || window.webkitURL;
        if (URL !== undefined) {
            imgURL = URL.createObjectURL(file);
            URL.revokeObjectURL(file);
            def.resolve({status: 200, message: 'OK', data:imgURL, error: {}});
        }
        //file reader support
        else if(window.File && window.FileReader)
        {
            var reader = new FileReader();
            reader.readAsDataURL(file);
            reader.onloadend = function () {
                imgURL = reader.result;
                def.resolve({status: 200, message: 'OK', data:imgURL, error: {}});
            }
        }
        else {
            def.reject({status: 1001, message: 'File uploader not supported', data:imgURL, error: {}});
        }
    }
    else
        def.reject({status: 1002, message: 'File type not supported', error: {}});
    return def.promise();
}

$('.dropper-dropzone').mouseenter(function() {
 $( '.dropper-dropzone>span' ).css("display", "block");
});

$('.dropper-dropzone').mouseleave(function() {
 $( '.dropper-dropzone>span' ).css("display", "none");
});

CSS

.dropper-dropzone{
    width:78px;
padding:3px;
    height:100px;
position: relative;
}
.dropper-dropzone>img{
    width:78px;
    height:100px;
margin-top=0;
}

.dropper-dropzone>span {
    position: absolute;
    right: 10px;
    top: 20px;
color:#ccc;


}

.dropper .dropper-dropzone{

padding:3px !important    
}

Demo Jsfiddle

Jest to dobra Wtyczka kątowa do wgrywania plików i jest darmowa!

Angular file upload

Przez jakiś czas borykałem się z tą wtyczką na Railsach, a potem ktoś ją wykombinował z całym stworzonym przeze mnie kodem.

Chociaż wygląda na to, że nie używasz tego w Rails, jednak jeśli ktoś go używa, sprawdź ten gem . Źródło jest tutaj -- >Jqueryfileupload Rails .

Update:

Aby zadowolić komentującego zaktualizowałem swoją odpowiedź. Zasadniczo "Użyj tego klejnotu, Oto kod źródłowy " jeśli zniknie więc zrób to z daleka.

Możesz użyć uploadify jest to najlepszy multiupload jQuery plugin używałem.

Implementacja jest prosta, obsługa przeglądarki jest doskonała.

Dla wtyczki UI, z JSP page i Spring MVC..

Sample html . Musi znajdować się w elemencie formularza z atrybutemid fileupload

    <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
<div class="fileupload-buttonbar">
    <div>
        <!-- The fileinput-button span is used to style the file input field as button -->
        <span class="btn btn-success fileinput-button">
            <i class="glyphicon glyphicon-plus"></i>
            <span>Add files</span>
            <input id="fileuploadInput" type="file" name="files[]" multiple>
        </span>
        <%-- https://stackoverflow.com/questions/925334/how-is-the-default-submit-button-on-an-html-form-determined --%>
        <button type="button" class="btn btn-primary start">
            <i class="glyphicon glyphicon-upload"></i>
            <span>Start upload</span>
        </button>
        <button type="reset" class="btn btn-warning cancel">
            <i class="glyphicon glyphicon-ban-circle"></i>
            <span>Cancel upload</span>
        </button>
        <!-- The global file processing state -->
        <span class="fileupload-process"></span>
    </div>
    <!-- The global progress state -->
    <div class="fileupload-progress fade">
        <!-- The global progress bar -->
        <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
            <div class="progress-bar progress-bar-success" style="width:0%;"></div>
        </div>
        <!-- The extended global progress state -->
        <div class="progress-extended">&nbsp;</div>
    </div>
</div>
<!-- The table listing the files available for upload/download -->
<table role="presentation" class="table table-striped"><tbody class="files"></tbody></table>

<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/css/jquery.fileupload.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/css/jquery.fileupload-ui.css">

<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/vendor/jquery.ui.widget.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/jquery.iframe-transport.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/jquery.fileupload.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/jquery.fileupload-process.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/jquery.fileupload-validate.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-file-upload-9.14.2/js/jquery.fileupload-ui.js"></script>

<script type="text/javascript">
    $(document).ready(function () {
            var maxFileSizeBytes = ${maxFileSizeBytes};
        if (maxFileSizeBytes < 0) {
            //-1 or any negative value means no size limit
            //set to undefined
            //https://stackoverflow.com/questions/5795936/how-to-set-a-javascript-var-as-undefined
            maxFileSizeBytes = void 0;
        }

        //https://github.com/blueimp/jQuery-File-Upload/wiki/Options
        //https://stackoverflow.com/questions/34063348/jquery-file-upload-basic-plus-ui-and-i18n
        //https://stackoverflow.com/questions/11337897/how-to-customize-upload-download-template-of-blueimp-jquery-file-upload
        $('#fileupload').fileupload({
            url: '${pageContext.request.contextPath}/app/uploadResources.do',
            fileInput: $('#fileuploadInput'),
            acceptFileTypes: /(\.|\/)(jrxml|png|jpe?g)$/i,
            maxFileSize: maxFileSizeBytes,
            messages: {
                acceptFileTypes: '${fileTypeNotAllowedText}',
                maxFileSize: '${fileTooLargeMBText}'
            },
            filesContainer: $('.files'),
            uploadTemplateId: null,
            downloadTemplateId: null,
            uploadTemplate: function (o) {
                var rows = $();
                $.each(o.files, function (index, file) {
                    var row = $('<tr class="template-upload fade">' +
                            '<td><p class="name"></p>' +
                            '<strong class="error text-danger"></strong>' +
                            '</td>' +
                            '<td><p class="size"></p>' +
                            '<div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0">' +
                            '<div class="progress-bar progress-bar-success" style="width:0%;"></div></div>' +
                            '</td>' +
                            '<td>' +
                            (!index && !o.options.autoUpload ?
                                    '<button class="btn btn-primary start" disabled>' +
                                    '<i class="glyphicon glyphicon-upload"></i> ' +
                                    '<span>${startText}</span>' +
                                    '</button>' : '') +
                            (!index ? '<button class="btn btn-warning cancel">' +
                                    '<i class="glyphicon glyphicon-ban-circle"></i> ' +
                                    '<span>${cancelText}</span>' +
                                    '</button>' : '') +
                            '</td>' +
                            '</tr>');
                    row.find('.name').text(file.name);
                    row.find('.size').text(o.formatFileSize(file.size));
                    if (file.error) {
                        row.find('.error').text(file.error);
                    }
                    rows = rows.add(row);
                });
                return rows;
            },
            downloadTemplate: function (o) {
                var rows = $();
                $.each(o.files, function (index, file) {
                    var row = $('<tr class="template-download fade">' +
                            '<td><p class="name"></p>' +
                            (file.error ? '<strong class="error text-danger"></strong>' : '') +
                            '</td>' +
                            '<td><span class="size"></span></td>' +
                            '<td>' +
                            (file.deleteUrl ? '<button class="btn btn-danger delete">' +
                                    '<i class="glyphicon glyphicon-trash"></i> ' +
                                    '<span>${deleteText}</span>' +
                                    '</button>' : '') +
                            '<button class="btn btn-warning cancel">' +
                            '<i class="glyphicon glyphicon-ban-circle"></i> ' +
                            '<span>${clearText}</span>' +
                            '</button>' +
                            '</td>' +
                            '</tr>');
                    row.find('.name').text(file.name);
                    row.find('.size').text(o.formatFileSize(file.size));
                    if (file.error) {
                        row.find('.error').text(file.error);
                    }
                    if (file.deleteUrl) {
                        row.find('button.delete')
                                .attr('data-type', file.deleteType)
                                .attr('data-url', file.deleteUrl);
                    }
                    rows = rows.add(row);
                });
                return rows;
            }
        });

    });
</script>

Przykładowe procedury wysyłania i usuwania żądań

    @PostMapping("/app/uploadResources")
public @ResponseBody
Map<String, List<FileUploadResponse>> uploadResources(MultipartHttpServletRequest request,
        Locale locale) {
    //https://github.com/jdmr/fileUpload/blob/master/src/main/java/org/davidmendoza/fileUpload/web/ImageController.java
    //https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#using-jquery-file-upload-ui-version-with-a-custom-server-side-upload-handler
    Map<String, List<FileUploadResponse>> response = new HashMap<>();
    List<FileUploadResponse> fileList = new ArrayList<>();

    String deleteUrlBase = request.getContextPath() + "/app/deleteResources.do?filename=";

    //http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/multipart/MultipartRequest.html
    Iterator<String> itr = request.getFileNames();
    while (itr.hasNext()) {
        String htmlParamName = itr.next();
        MultipartFile file = request.getFile(htmlParamName);
        FileUploadResponse fileDetails = new FileUploadResponse();
        String filename = file.getOriginalFilename();
        fileDetails.setName(filename);
        fileDetails.setSize(file.getSize());
        try {
            String message = saveFile(file);
            if (message != null) {
                String errorMessage = messageSource.getMessage(message, null, locale);
                fileDetails.setError(errorMessage);
            } else {
                //save successful
                String encodedFilename = URLEncoder.encode(filename, "UTF-8");
                String deleteUrl = deleteUrlBase + encodedFilename;
                fileDetails.setDeleteUrl(deleteUrl);
            }
        } catch (IOException ex) {
            logger.error("Error", ex);
            fileDetails.setError(ex.getMessage());
        }

        fileList.add(fileDetails);
    }

    response.put("files", fileList);

    return response;
}

@PostMapping("/app/deleteResources")
public @ResponseBody
Map<String, List<Map<String, Boolean>>> deleteResources(@RequestParam("filename") List<String> filenames) {
    Map<String, List<Map<String, Boolean>>> response = new HashMap<>();
    List<Map<String, Boolean>> fileList = new ArrayList<>();

    String templatesPath = Config.getTemplatesPath();
    for (String filename : filenames) {
        Map<String, Boolean> fileDetails = new HashMap<>();

        String cleanFilename = ArtUtils.cleanFileName(filename);
        String filePath = templatesPath + cleanFilename;

        File file = new File(filePath);
        boolean deleted = file.delete();

        if (deleted) {
            fileDetails.put(cleanFilename, true);
        } else {
            fileDetails.put(cleanFilename, false);
        }

        fileList.add(fileDetails);
    }

    response.put("files", fileList);

    return response;
}

Przykładowa Klasa generowania wymaganej odpowiedzi json

    public class FileUploadResponse {
    //https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#using-jquery-file-upload-ui-version-with-a-custom-server-side-upload-handler

    private String name;
    private long size;
    private String error;
    private String deleteType = "POST";
    private String deleteUrl;

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the size
     */
    public long getSize() {
        return size;
    }

    /**
     * @param size the size to set
     */
    public void setSize(long size) {
        this.size = size;
    }

    /**
     * @return the error
     */
    public String getError() {
        return error;
    }

    /**
     * @param error the error to set
     */
    public void setError(String error) {
        this.error = error;
    }

    /**
     * @return the deleteType
     */
    public String getDeleteType() {
        return deleteType;
    }

    /**
     * @param deleteType the deleteType to set
     */
    public void setDeleteType(String deleteType) {
        this.deleteType = deleteType;
    }

    /**
     * @return the deleteUrl
     */
    public String getDeleteUrl() {
        return deleteUrl;
    }

    /**
     * @param deleteUrl the deleteUrl to set
     */
    public void setDeleteUrl(String deleteUrl) {
        this.deleteUrl = deleteUrl;
    }

}

Zobacz https://pitipata.blogspot.co.ke/2017/01/using-jquery-file-upload-ui.html

Cześć spróbuj poniżej link to jest bardzo proste. Utknąłem przez długi czas i to rozwiązuje mój problem w kilka minut. http://simpleupload.michaelcbrook.com/#examples