文件上传功能作为网页重要的组成部分,几乎无处不在,从简单的单个文件上传到复杂的批量上传、拖放上传,需要开发者花费大量的时间和精力去处理,以期实现好用的上传功能。这篇文章向大家推荐几款很棒的 JavaScript 文件上传功能增强插件。
这是最受欢迎的 jQuery 文件上传组件,支持批量上传,拖放上传,显示上传进度条以及校验功能。
支持预览图片、音频和视频,支持跨域上传和客户端图片缩放,支持的服务端平台有:PHP, Python, Ruby on Rails, Java, Node.js, Go 等等。
使用示例:
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$( function () { 'use strict' ; // Change this to the location of your server-side upload handler: var url = window.location.hostname === 'blueimp.github.io' ? '//jquery-file-upload.appspot.com/' : 'server/php/' ; $( '#fileupload' ).fileupload({ url: url, dataType: 'json' , done: function (e, data) { $.each(data.result.files, function (index, file) { $( '<p/>' ).text(file.name).appendTo( '#files' ); }); }, progressall: function (e, data) { var progress = parseInt(data.loaded / data.total * 100, 10); $( '#progress .progress-bar' ).css( 'width' , progress + '%' ); } }).prop( 'disabled' , !$.support.fileInput) .parent().addClass($.support.fileInput ? undefined : 'disabled' ); }); |
DropzoneJS 是一个用于现代浏览器的开源的拖放上传插件,最大的特色是即时图片预览功能。
使用方法非常简单,只需添加 class 即可:
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< form id = "my-awesome-dropzone" action = "/target" class = "dropzone" ></ form > |
或者手动实例化:
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new Dropzone( "div#my-dropzone" , { /* options */ }); |
可以添加更多参数:
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Dropzone.options.myAwesomeDropzone = { maxFilesize: 1 }; |
发可以自定义事件:
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Dropzone.options.myDropzone({ init: function () { this .on( "error" , function (file, message) { alert(message); }); } }); // or if you need to access a Dropzone somewhere else: var myDropzone = Dropzone.forElement( "div#my-dropzone" ); myDropzone.on( "error" , function (file, message) { alert(message); });<span style= "line-height: 1.5" > </span> |
Uploadify 有两个版本,HTML5 方法上传版本和传统的 Flash 上传。支持高度自定义,可以完美的继承到你的网站中。
Flash 版本兼容性好,使用示例:
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$( function () { $( "#file_upload_1" ).uploadify({ height : 30, swf : '/uploadify/uploadify.swf' , uploader : '/uploadify/uploadify.php' , width : 120 }); }); |
这个 JavaScript 插件可以帮助你在网站中集成体验极好的文件上传功能。可以结合 jQuery 或者 Bootstrap 使用。
主要特色:
- 批量上传
- 显示进度条
- 拖放上传
- 自动或者手动上传,可取消
- 自定义错误提示信息
- 自动或者手动重试
- 内置的校验规则
- 可编辑文件名称
使用示例:
(1)手动触发上传
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< div id = "manual-fine-uploader" ></ div > < div id = "triggerUpload" class = "btn btn-primary" style = "margin-top: 10px;" > < i class = "icon-upload icon-white" ></ i > Upload now </ div > < script src = "jquery.fineuploader-{VERSION}.js" ></ script > < script > $(document).ready(function() { var manualuploader = $('#manual-fine-uploader').fineUploader({ request: { endpoint: 'server/handleUploads' }, autoUpload: false, text: { uploadButton: '< i class = "icon-plus icon-white" ></ i > Select Files' } }); $('#triggerUpload').click(function() { manualuploader.fineUploader('uploadStoredFiles'); }); }); </ script > |
(2)编辑文件名称
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<!DOCTYPE html> < html > < head > < meta charset = "utf-8" > < title >Fine Uploader - jQuery Wrapper Minimal Demo</ title > < link href = "fineuploader-{VERSION}.css" rel = "stylesheet" > </ head > < body > < div id = "jquery-wrapped-fine-uploader" ></ div > < div id = "triggerUpload" class = "btn btn-primary" style = "margin-top: 10px;" > < i class = "icon-upload icon-white" ></ i > Upload now </ div > < script src = "jquery.fineuploader-{VERSION}.js" ></ script > < script > $(document).ready(function () { $('#myFineUploader').fineUploader({ request: { endpoint: 'server/handleUploads' }, editFilename: { enabled: true }, autoUpload: false }); $('#triggerUpload').click(function() { $('#myFineuploader').fineUploader('uploadStoredFiles'); }); </ script > </ body > </ html > |
(3)自定义选项
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< div id = "restricted-fine-uploader" ></ div > < script src = "jquery.fineuploader-{VERSION}.js" ></ script > < script > $(document).ready(function() { $('#restricted-fine-uploader').fineUploader({ request: { endpoint: 'server/success.html' }, multiple: false, validation: { allowedExtensions: ['jpeg', 'jpg', 'txt'], sizeLimit: 51200 // 50 kB = 50 * 1024 bytes }, text: { uploadButton: 'Click or Drop' }, showMessage: function(message) { // Using Bootstrap's classes $('#restricted-fine-uploader').append('< div class = "alert alert-error" >' + message + '</ div >'); } }); }); </ script > |
(4)显示图片缩略图
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< div id = "thumbnail-fine-uploader" ></ div > < script src = "jquery.fineuploader-{VERSION}.js" ></ script > < script > $(document).ready(function() { $('#thumbnail-fine-uploader').fineUploader({ request: { endpoint: 'server/success.html' }, validation: { allowedExtensions: ['jpeg', 'jpg', 'gif', 'png'] }, text: { uploadButton: 'Click or Drop' } }).on('complete', function(event, id, fileName, responseJSON) { if (responseJSON.success) { $(this).append('< img src = "img/success.jpg" alt = "' + fileName + '" >'); } }); }); </ script > |
(5)限制文件上传数
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< div id = "filelimit-fine-uploader" ></ div > < script src = "jquery.fineuploader-{VERSION}.js" ></ script > < script > $(document).ready(function() { $('#filelimit-fine-uploader').fineUploader({ request: { endpoint: 'server/success.html' }, validation: { itemLimit: 3 } }); }); </ script > |