/*直接复制在自己的js文件中就能使用*/

jQuery.extend({
createUploadIframe: function (id, uri) {
//create frame
var frameId = 'jUploadFrame' + id;

if (window.ActiveXObject) {
var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
if (typeof uri == 'boolean') {
io.src = 'javascript:false';
}
else if (typeof uri == 'string') {
io.src = uri;
}
}
else {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}
io.style.position = 'absolute';
io.style.top = '-1000px';
io.style.left = '-1000px';
document.body.appendChild(io);
return io
},
createUploadForm: function (id, fileElementId, data) {
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-

data"></form>');
var oldElement = $('#' + fileElementId);
var newElement = $(oldElement).clone();
$(oldElement).attr('id', fileId);
$(oldElement).before(newElement);
$(oldElement).appendTo(form);
//<span style="color:#ff0000;">增加文本参数的支持,修改本处,本处应有掌声 </span>
if (data) {
for (var i in data) {
var temp = $('<input type="hidden" name="' + i + '" />');
temp.val(data[i]);
temp.appendTo(form);
}
}
//set attributes
$(form).css('position', 'absolute');
$(form).css('top', '-1200px');
$(form).css('left', '-1200px');
$(form).appendTo('body');
return form;
},
ajaxFileUpload: function (s) {
// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = new Date().getTime()
var form = jQuery.createUploadForm(id, s.fileElementId, s.data);
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if (s.global && !jQuery.active++) {
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {}
if (s.global)
jQuery.event.trigger("ajaxSend", [xml, s]);
// Wait for a response to come back
var uploadCallback = function (isTimeout) {
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument :

io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML :

null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument

: io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if (status != "error") {
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData(xml, s.dataType);
// If a local callback was specified, fire it and pass it the data
if (s.success)
s.success(data, status);
// Fire the global callback
if (s.global)
jQuery.event.trigger("ajaxSuccess", [xml, s]);
} else
jQuery.handleError(s, xml, status);
} catch (e) {
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if (s.global)
jQuery.event.trigger("ajaxComplete", [xml, s]);
// Handle the global AJAX counter
if (s.global && ! --jQuery.active)
jQuery.event.trigger("ajaxStop");
// Process result
if (s.complete)
s.complete(xml, status);
jQuery(io).unbind()
setTimeout(function () {
try {
$(io).remove();
$(form).remove();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
}, 100)
xml = null
}
}
// Timeout checker
if (s.timeout > 0) {
setTimeout(function () {
// Check to see if the request is still happening
if (!requestDone) uploadCallback("timeout");
}, s.timeout);
}
try {
// var io = $('#' + frameId);
var form = $('#' + formId);
$(form).attr('action', s.url);
$(form).attr('method', 'POST');
$(form).attr('target', frameId);
if (form.encoding) {
form.encoding = 'multipart/form-data';
}
else {
form.enctype = 'multipart/form-data';
}
$(form).submit();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (window.attachEvent) {
document.getElementById(frameId).attachEvent('onload', uploadCallback);
}
else {
document.getElementById(frameId).addEventListener('load', uploadCallback, false);
}
return { abort: function () { } };
},
uploadHttpData: function (r, type) {
/*源代码
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object, if JSON is used.
if (type == "json")
eval("data = " + data);
// evaluate scripts within html
if (type == "html")
jQuery("<div>").html(data).evalScripts();
//alert($('param', data).each(function(){alert($(this).attr('value'));}));
return data;
*/
//修改后返回格式给成json
var data = r.responseText;
var start = data.indexOf("{");
var end = data.indexOf("}");
var jsonStr = data.substring(start, end + 1);
return (jsonStr instanceof Object) ? jsonStr : eval("(" + jsonStr + ")");
}
})

/*==上面的代码直接复制在自己的js文件中就能使用==========================================================================================*/

/*js上传代码*/

$.ajaxFileUpload({
type: "POST",
contentType: false,
enctype: "multipart/form-data",
url: "/url/路径",
data: { 参数名: JSON.stringify(参数名), 参数名: JSON.stringify(参数名) },//参数做json序列化(参数可以使对象、集合、字段)
secureuri: false,
fileElementId: 'file_name',
dataType: 'json',
async: false,
success: function (data) {
//关闭等待
MaskUtil.unmask();
if (data.IsSuccess) {
$.messager.alert('操作提示', data.Message, 'info');
}
else {
$.messager.alert('操作提示', data.Message, 'info');
}
}
});

/*个人心得

1.ajaxFileUpload传参数时data：{后台接收的参数名:要传的参数对象}，这里值需要做json序列化

2.ajaxFileUpload返回值json格式，已在1.ajaxFileUpload.js文件修改其返回值，

3.后台接收参数使用Request["后台接收的参数名"],这里值需要做json返序列化

*/