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_ "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);
}
}
});
}