swf 上传

推荐这个博客：http://blog.csdn.net/hi_kevin/article/details/23430345

这个文章很不错，我推荐这个文章：http://leeon.me/upload/other/swfupload.html#globals

 var swfu;
        window.onload = function () {
            var settings = {
                flash_url: "/plugins/swfupload/core/Flash/swfupload.swf",
                upload_url: "/system/upload/annex",
                post_params: {"PHPSESSID": sessionId, "name": "annex"},
                file_size_limit: "30 MB",
                file_types: "*.gif;*.jpg;*.jepg;*.png;*.bmp;*.txt;*.zip;*.rar;*.pdf;*.ppt;*.doc;*.xls;*.xlsx;*.docx;*.rtf",
                file_types_description: "jap,png,rar,zip",
                file_upload_limit: 0,
                file_queue_limit: 0,
                custom_settings: {
                    progressTarget: "fsUploadProgress",
                    cancelButtonId: "btnCancel"
                },
                debug: false,

                // Button settings
                button_width: "80",
                button_height: "20",
                button_placeholder_id: "spanButtonPlaceHolder",
                button_text: '上传附件',
                button_text_left_padding: 12,
                button_text_top_padding: 3,

                // The event handler functions are defined in handlers.js
                file_queue_error_handler: fileQueueError,
                file_dialog_complete_handler: replyFileDialogComplete,//当选择文件对话框关闭，并且所有选择文件已经处理完成（加入上传队列成功或者失败）时，此事件被触发
                upload_error_handler: uploadError,
                upload_success_handler: replyUploadSuccess,//当文件上传的处理已经完成
                upload_start_handler: uploadStart,
                file_queued_handler: fileQueued,// 文件被加入队列时触发

                upload_progress_handler: uploadProgress  //进度
//                upload_start_handler: upload_start_handlers  //在文件往服务端上传之前触发此事件，可以在这里完成上传前的最后验证以及其他你需要的操作
//                upload_progress_handler : uploadProgress,
            };
            swfu = new SWFUpload(settings);
        };

        function fileQueued(file) {
            var swfUpload = this;
            var listItem = '<li id="' + file.id + '">';
            listItem += '文件:<em>' + file.name + '</em>(' + Math.round(file.size/1024) + ' KB)';
            listItem += '<span class="progressValue"></span>'
            + '<div class="progressBar"><div class="progress"></div></div>'
            + '<p class="status" >Pending</p>'
            + '<span class="cancel" > </span>'
            + '</li>';
            $("#logList").append(listItem);
//            $("li#" + file.id + " .cancel").click(function(e) {
//                swfUpload.cancelUpload(file.id);
//                $("li#" + file.id).slideUp('fast');
//            })
//  swfUpload.startUpload();
        }

        function uploadStart(file) {
            if (file) {
                $("#logList li#" + file.id).find('p.status').text('上传中...');
                $("#logList li#" + file.id).find('p.progressValue').text('0%');
            }
        }
        /**
         * 文件上传过程中定时触发,更新进度显示
         * @param file 上传的文件
         * @param bytesCompleted 已上传大小
         * @param bytesTotal 文件总大小
         */
        function uploadProgress(file,bytesCompleted,bytesTotal) {
            var percentage = Math.round((bytesCompleted / bytesTotal) * 100);
            $("#logList li#" + file.id).find('div.progress').css('width',percentage + '%');
            $("#logList li#" + file.id).find('span.progressValue').text(percentage + '%');
        }

        //上传成功动作
        function replyUploadSuccess(file, serverData) {
            try {

                var data = JSON.parse(serverData);
                var size = $("div .btn-group").attr("data-size");
                layer.msg("附件(" + file.name + ")上传成功", 1, {type: 1}, function () {
                    //显示附件信息
                    var html = '<div class="btn-group" data-size="0"  style="margin-left: 70px;" id="' + data.fileId + '"><input type="checkbox" class="annex"' +
                            ' style="float:left;" checked name="annex[' + data.fileId + ']" value="' + file.name + '" ><div name="filename" style="float:left;" >' + file.name + '</div>' +
                            '<a style="margin-left:20px;cursor:pointer;float:left; " onclick="delAnnex(this)" >删除</a></div> ';

                    var item = $("#logList li#" + file.id);
                    item.find('div.progress').css('width','100%');
                    item.find('span.progressValue').css('color','red').text('100%');
                    item.addClass('success').find('p.status').html('上传完成!');

                    if(size==null  ||size=='undefied'){
                        $("#showAnnex").append(html);
                        $("div .btn-group").attr("data-size", file.size);
                    }else{
                        var total_size = size * 1 + file.size * 1;
                        $("div .btn-group").attr("data-size", total_size);
                        var max_size = $("div .btn-group").attr("data-size");
                        if(max_size>=52428800){
                            alert("附件总大小不超过 50M"); return ;
                        }else{
                            $("#showAnnex").append(html);
                        }
                    }
                    //绑定文件删除事件
                    $(".annex").change(function () {
                        if (!$(this).is(':checked')) {
                            $(this).parent().remove();
                        }
                        //TODO 检查是否显示上传框
                    });
                });
            } catch (ex) {
                this.debug(ex);
                alert(ex);
            }
        }

        //上传文件
        function replyFileDialogComplete(numFilesSelected, numFilesQueued) {
            try {
                this.startUpload();
            } catch (ex) {
                this.debug(ex);
            }
        }

        //删除附件操作
        function delAnnex(obj) {
            var annex = obj.parentNode.firstChild.value;
            $.ajax({
                type: "get",
                url: "/email/draft/del-annex?annex=" + annex,
                dataType: "json",
                success: function (data) {
                    if (data.status == 'y') {
                        obj.parentNode.remove();
                        layer.msg(data.info, 1, 9);
                        $_this.parent().parent().remove();
                    } else {
                        layer.alert(data.info);
                    }
                }
            });
        }