Jquery File upload 初探

官網：https://blueimp.github.io/jQuery-File-Upload/

能夠看到官方提供了幾種不一樣的方案：我用的是basic plus ui 的樣式  

源碼直接從github上下載便可：

要用到本身的項目裏面，仍是要注意幾個問題：

１.Jquery 、bootstrap 都要引入，注意引入的順序

 2.控制上傳的代碼在main.js 裏面 （見源碼包）

 $('#fileupload').fileupload({
        // Uncomment the following to send cross-domain cookies:
        //xhrFields: {withCredentials: true},
        url: 'server/fileupload'
    });

    // Enable iframe cross-domain access via redirect option:
    $('#fileupload').fileupload(
        'option',
        'redirect',
        window.location.href.replace(
            /\/[^\/]*$/,
            '/cors/result.html?%s'
        )
    );
//這裏控制文件上傳的類型、大小 ，可是明顯添加了github的限制blueimp.github.io， 
    if (window.location.hostname === 'blueimp.github.io') {
        // Demo settings:
        $('#fileupload').fileupload('option', {
            url: '//jquery-file-upload.appspot.com/',
            // Enable image resizing, except for Android and Opera,
            // which actually support image resizing, but fail to
            // send Blob objects via XHR requests:
            disableImageResize: /Android(?!.*Chrome)|Opera/
                .test(window.navigator.userAgent),
            maxFileSize: 999000,
            acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i
        });
        // Upload server status check for browsers with CORS support:
        if ($.support.cors) {
            $.ajax({
                url: '//jquery-file-upload.appspot.com/',
                type: 'HEAD'
            }).fail(function () {
                $('<div class="alert alert-danger"/>')
                    .text('Upload server currently unavailable - ' +
                            new Date())
                    .appendTo('#fileupload');
            });
        }
    } else {
        // Load existing files:
        $('#fileupload').addClass('fileupload-processing');
        $.ajax({
            // Uncomment the following to send cross-domain cookies:
            //xhrFields: {withCredentials: true},
            url: $('#fileupload').fileupload('option', 'url'),
            dataType: 'json',
            context: $('#fileupload')[0]
        }).always(function () {
            $(this).removeClass('fileupload-processing');
        }).done(function (result) {
            $(this).fileupload('option', 'done')
                .call(this, $.Event('done'), {result: result});
        });
    }

 

 3.上傳列表有２段源碼：

<!-- The template to display files available for upload -->
<script id="template-upload" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-upload fade">
        <td>
            <span class="preview"></span>
        </td>
        <td>
            <p class="name">{%=file.name%}</p>
            <strong class="error text-danger"></strong>
        </td>
        <td>
            <p class="size">Processing...</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>
            {% if (!i && !o.options.autoUpload) { %}
                <button class="btn btn-primary start" disabled>
                    <i class="glyphicon glyphicon-upload"></i>
                    <span>Start</span>
                </button>
            {% } %}
            {% if (!i) { %}
                <button class="btn btn-warning cancel">
                    <i class="glyphicon glyphicon-ban-circle"></i>
                    <span>Cancel</span>
                </button>
            {% } %}
        </td>
    </tr>
{% } %}
</script>
<!-- The template to display files available for download -->
<script id="template-download" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-download fade">
        <td>
            <span class="preview">
                {% if (file.thumbnailUrl) { %}
                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" data-gallery><img src="{%=file.thumbnailUrl%}"></a>
                {% } %}
            </span>
        </td>
        <td>
            <p class="name">
                {% if (file.url) { %}
                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" {%=file.thumbnailUrl?'data-gallery':''%}>{%=file.name%}</a>
                {% } else { %}
                    <span>{%=file.name%}</span>
                {% } %}
            </p>
            {% if (file.error) { %}
                <div><span class="label label-danger">Error</span> {%=file.error%}</div>
            {% } %}
        </td>
        <td>
            <span class="size">{%=o.formatFileSize(file.size)%}</span>
        </td>
        <td>
            {% if (file.deleteUrl) { %}
                <button class="btn btn-danger delete" data-type="{%=file.deleteType%}" data-url="{%=file.deleteUrl%}"{% if (file.deleteWithCredentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
                    <i class="glyphicon glyphicon-trash"></i>
                    <span>Delete</span>
                </button>
                <input type="checkbox" name="delete" value="1" class="toggle">
            {% } else { %}
                <button class="btn btn-warning cancel">
                    <i class="glyphicon glyphicon-ban-circle"></i>
                    <span>Cancel</span>
                </button>
            {% } %}
        </td>
    </tr>
{% } %}
</script>

 

均是用來展現文件列表的：上傳前、上傳後　

上傳前修改比較簡單，這裏簡要說下上傳後返回值的問題：

見源碼能夠看到不少參數：

file.thumbnailUrl，file.url，file.size，file.name 等等

 

若是頁面要展現這些參數 thumbnailUrl、url 、size ...那麼就要在返回正確的格式：

   			//fileMeta 裏面定義就是須要返回給頁面的參數
	   			 fileMeta = new FileMeta();
	   			 fileMeta.setName(file.getOriginalFilename());
	   			 fileMeta.setSize(file.getSize());
	   			 fileMeta.setDeleteType("delete");
	   			 fileMeta.setUrl(inUrl);
	   				
	   			 fileList.add(fileMeta);
	            
                	           HashMap<Object,Object> hashMap = new HashMap<>();
                	           hashMap.put("files", fileList);
                	          return hashMap;

 

用的的springmvc 返回的map會轉化爲json。原本覺得直接返回FileMate 或者Arraylist 就能夠，可是debug 發現不行。各位能夠本身試試。