几款极好的 JavaScript 文件上传插件

时间:2024-02-23 19:47:08

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。

  jQuery File Uploader

  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\');
});

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  DropZoneJS

  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>

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  Uploadify

  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
    });
});

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  FineUploader

  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="http://code.jquery.com/jquery-latest.js"></script>
    <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>

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