插件名： jquery.upload.js

基本：

依赖：jquery，ajaxFileUpload.js

调用：$("#uploadBtn").upload(options)

作者：vuturn

Options参数

uploadFile

选择触发的文本上传按钮

callback

回调函数

url

异步请求的url 

调用

HTML：

<button id="uploadBtn">文件上传</button>
<input type="file" id="uploadFile" name="uploadFile" style="display: none">

JS：

  $("#uploadBtn").upload({
      uploadFile : $("#uploadFile"),
      callback : function (rs) {
          console.log(rs);
      },
      url:"?r=test/manage"
  });

说明

1.后台必须返回json，否则ajaxFileUpload会报错

2.修复了文本输入框第二次调用onchange事件失败的bug

jquery.upload.js源代码

;(function ($, window, document, undefined) {
    //默认操作
    var defaults = {
            //选择元素
            uploadFile: $("#uploadFile"),
            //回调函数
            callback: function (rs) {
                console.log(rs);
            },
            //url
            url: ""
        },
    //缓存实例
        _that,
    //插件构造函数
        Plugin = function (element, options) {
            this.element = element;
            this.options = $.extend({}, defaults, options);
            this._defaults = defaults;
            this.init();
        };
    //初始化函数
    Plugin.prototype.init = function () {
        _that = this;
        //点击上传触发隐藏的文本上传按钮
        $(this.element).on("click", function () {
            //ajaxFileUpload 会自己建立一个隐藏的文本上传按钮，而且将我们的绑定事件转移到这个元素身上
            // 所以trigger触发会遇到第二次上传不触发onchange事件
            $(_that.options.uploadFile.selector).trigger("click");
        });
        //文件上传onchange事件
        this.options.uploadFile.on("change", function () {
            DialogBindUploadFile($(this), _that.options.url, _that.options.callback);
        });
    };
    //插件
    $.fn.upload = function (options) {
        return this.each(function () {
            if (!$.data(this, "upload")) {
                $.data(this, "upload", new Plugin(this, options));
            }
        });
    };

    var DialogBindUploadFile = function ($obj, url, callback) {
            var _name = $obj.val();
            if (_name) {
                _name = _name.split("\\").pop();
                DialogUploadFile(url, $obj, $obj.attr('id'), _name, "cover", callback);
            } else {
                alert("请选择文件");
            }
        },
    //调用ajaxFileUpload
        DialogUploadFile = function (_url, _obj, _id, _name, type, success) {

            var $csrf = $('meta[name = YII_CSRF_TOKEN]').attr('value'),
                _data = {};

            _data['YII_CSRF_TOKEN'] = $csrf;
            _data['type'] = type;

            $.ajaxFileUpload({
                url: _url,
                secureuri: false,
                fileElementId: _id,
                dataType: 'json',
                data: _data,
                success: function (rs) {
                    //回调函数
                    success.call(null, rs);
                    //第二次绑定
                    $(_that.options.uploadFile.selector).on("change", function () {
                        DialogBindUploadFile($(this), _that.options.url, _that.options.callback);
                    });
                }
            });
        };

})(jQuery, window, document);