jQuery File Upload 是一个Jquery图片上传组件，支持多文件上传、取消、删除，上传前缩略图预览、列表显示图片大小，支持上传进度条显示；支持各种动态语言开发的服务器端。

效果图如下所示：

html 部分

<div style="line-height:34px;margin-top:20px;"> <label style="float: left;font-size:14px">上传文件：</label> <span class="btn btn-success fileinput-button fn-left"> <i class="glyphicon glyphicon-plus"></i> <span>浏览...</span> <input type="file" name="file" id="file_upload"> </span> <div style="float: left;margin-left: 20px;font-weight: bold" id="uploadText"></div> </div> <div class="fn-clear"></div> <div id="progress"> <div class="bar" style="width: 0%;"></div> </div>

css 部分

<link rel="stylesheet" href="/admin/assets/plugins/jquery-file-upload/css/jquery.fileupload-ui.css" rel="external nofollow" > <link rel="stylesheet" href="/admin/assets/plugins/jquery-file-upload/css/jquery.fileupload.css" rel="external nofollow" > .bar { background-image: -webkit-linear-gradient(top,#5cb85c 0,#449d44 100%); background-image: -o-linear-gradient(top,#5cb85c 0,#449d44 100%); background-image: -webkit-gradient(linear,left top,left bottom,from(#5cb85c),to(#449d44)); background-image: linear-gradient(to bottom,#5cb85c 0,#449d44 100%); filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff449d44', GradientType=0); background-repeat: repeat-x; height: 20px; font-size: 12px; line-height: 20px; color: #fff; text-align: center; background-color: #428bca; -webkit-box-shadow: inset 0 -1px 0 rgba(0,0,0,.15); box-shadow: inset 0 -1px 0 rgba(0,0,0,.15); -webkit-transition: width .6s ease; -o-transition: width .6s ease; transition: width .6s ease; } #progress { background-image: -webkit-linear-gradient(top,#ebebeb 0,#f5f5f5 100%); background-image: -o-linear-gradient(top,#ebebeb 0,#f5f5f5 100%); background-image: -webkit-gradient(linear,left top,left bottom,from(#ebebeb),to(#f5f5f5)); background-image: linear-gradient(to bottom,#ebebeb 0,#f5f5f5 100%); filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffebebeb', endColorstr='#fff5f5f5', GradientType=0); background-repeat: repeat-x; height: 20px; width: 0%; margin-bottom: 20px; overflow: hidden; background-color: #f5f5f5; border-radius: 4px; -webkit-box-shadow: inset 0 1px 2px rgba(0,0,0,.1); box-shadow: inset 0 1px 2px rgba(0,0,0,.1); margin-top: 20px; } .glyphicon { position: relative; top: 1px; display: inline-block; font-family: 'Glyphicons Halflings'; font-style: normal; font-weight: 400; line-height: 1; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; } .glyphicon-plus:before { content: "\2b"; } .btn-success { color: #fff; background-color: #5cb85c; border-color: #4cae4c; } .btn { display: inline-block; padding: 6px 12px; margin-bottom: 0; font-size: 14px; font-weight: 400; line-height: 1.42857143; text-align: center; white-space: nowrap; vertical-align: middle; cursor: pointer; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; background-image: none; border: 1px solid transparent; border-radius: 4px; }

js 部分

<script src="/admin/assets/plugins/jquery-file-upload/js/vendor/jquery.ui.widget.js"></script> <script src="/admin/assets/plugins/jquery-file-upload/js/jquery.fileupload.js"></script> <script type="text/javascript" src="${pageContext.request.contextPath}/admin/assets/plugins/jquery-1.10.2.min.js"></script> <span style="font-family:monospace;font-size:14px;"> <span id="_xhe_cursor"></span>$('#file_upload').fileupload({ dataType: 'json', url:'${pageContext.request.contextPath}/excel/upload', autoUpload:false, add: function (e, data) { $('#progress').css( 'width','0%' ); $('#progress .bar').css( 'width', '0%' ); $("#uploadText").empty(); var fileType = data.files[0].name.split('.').pop(); // console.log(data); var acceptFileTypes = /xls|xlsx$/i; var size = data.files[0].size; size = (size/1024).toFixed(2);//文件大小单位kb var maxFileSize = 5*1024;//最大允许文件大小单位kb if (!acceptFileTypes.test(fileType)) { new Message({message:"不支持的文件类型，仅支持EXCEL文件"}); return ; } if(size>maxFileSize){ new Message({message:"文件大小："+size+"KB,超过最大限制："+maxFileSize+"KB"}); return ; } data.context = $("<button class=' ui-button ui-button-lwhite'/>").text("上传") .appendTo("#uploadText") .click(function () { data.context = $("<p/>").text("正在上传...").replaceAll($(this)); data.submit(); }); }, progressall: function (e, data) { var progress = parseInt(data.loaded / data.total * 100, 10); $('#progress').css( 'width','100%' ); $('#progress .bar').css( 'width',progress + '%' ); }, fail:function (e, data) { new Message({message:"上传失败"}); }, done: function (e, data) { console.log(data.files[0]); var fileName = data.files[0].name; var size = data.files[0].size; var obj = data.result; if(obj.success == true){ $("#filePath").val(obj.result.fileId+"&"+obj.result.opLogId); data.context.text("文件上传已完成！文件名："+fileName+" 文件大小："+size+"kb"); }else{ alert(obj.errorMsg); } } });</span>

XHR响应为Json时IE的下载BUG

这里需要特别注意的是，由于jQuery File Upload都是采用XHR在传递数据，服务器端返回的通常是JSON格式的响应，但是IE会将这些JSON响应误认为是文件传输，然后直接弹出下载框询问是否需要下载。

解决这个问题的方法是必须将相应的Http Head从

Content-Type: application/json

更改为

Content-Type: text/

总结

以上所述是小编给大家介绍的jquery-file-upload 文件上传带进度条效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！