ajaxfileupload实现单个或多个文件的上传

• 核心js类库：

  jQuery.extend( {
  	handleError : function(s,xhr,status,e) {
  		if (s.error)
  			s.error(xhr,e);
  		else if (xhr.responseText)
  			console.log(xhr.responseText);
  	}
  });
  jQuery
  		.extend( {
              //创建上传的Frame
  			createUploadIframe : function(id,uri) {
  				// create frame
  			var frameId = 'jUploadFrame' + id;
  			var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId
  					+ '" style="position:absolute; top:-9999px; left:-9999px"';
  			if (window.ActiveXObject) {
  				if (typeof uri == 'boolean') {
  					iframeHtml += ' src="' + 'javascript:false' + '"';
  
  				} else if (typeof uri == 'string') {
  					iframeHtml += ' src="' + uri + '"';
  
  				}
  			}
  			iframeHtml += ' />';
  			jQuery(iframeHtml).appendTo(document.body);
  
  			return jQuery('#' + frameId).get(0);
  		},//动态创建上传Form
  		createUploadForm : function(id,fileElementId,data) {
  			// create form
  			var formId = 'jUploadForm' + id;
  			var fileId = 'jUploadFile' + id;
  			var form = jQuery('<form  action="" method="POST" name="' + formId
  					+ '" id="' + formId
  					+ '" enctype="multipart/form-data"></form>');
  			if (data) {
  				for ( var i in data) {
  					jQuery(
  							'<input type="hidden" name="' + i + '" value="'
  									+ data[i] + '" />').appendTo(form);
  				}
  			}
  			//单个文件上传
  			/*var oldElement = jQuery('#' + fileElementId);
  			var newElement = jQuery(oldElement).clone();
  			jQuery(oldElement).attr('id',fileId);
  			jQuery(oldElement).before(newElement);
  			jQuery(oldElement).appendTo(form);*/
  
  			//多文件上传
  		    for(var i in fileElementId){  
  		        var oldElement = jQuery('#' + fileElementId[i]);  
  		        var newElement = jQuery(oldElement).clone();  
  		        jQuery(oldElement).attr('id',fileId);  
  		        jQuery(oldElement).before(newElement);  
  		        jQuery(oldElement).appendTo(form);  
  		    }  
  		    //end
  		    
  			// set attributes
  			jQuery(form).css('position','absolute');
  			jQuery(form).css('top','-1200px');
  			jQuery(form).css('left','-1200px');
  			jQuery(form).appendTo('body');
  			return form;
  		},//上传文件
  		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,(typeof (s.data) == 'undefined' ? false : 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",s ]);
  						} else
  							jQuery.handleError(s,status);
  					} catch (e) {
  						status = "error";
  						jQuery.handleError(s,e);
  					}
  
  					// The request was completed
  					if (s.global)
  						jQuery.event.trigger("ajaxComplete",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 {
  							jQuery(io).remove();
  							jQuery(form).remove();
  
  						} catch (e) {
  							jQuery.handleError(s,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 form = jQuery('#' + formId);
  				jQuery(form).attr('action',s.url);
  				jQuery(form).attr('method','POST');
  				jQuery(form).attr('target',frameId);
  				if (form.encoding) {
  					jQuery(form).attr('encoding','multipart/form-data');
  				} else {
  					jQuery(form).attr('enctype','multipart/form-data');
  				}
  				jQuery(form).submit();
  
  			} catch (e) {
  				jQuery.handleError(s,e);
  			}
  
  			jQuery('#' + frameId).load(uploadCallback);
  			return {
  				abort : function() {
  				}
  			};
  
  		},//返回数据格式
  		uploadHttpData : function(r,type) {
  			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();
  
  			return data;
  		}
  		});
  

  
  
• 使用方法:
• 
  

    //HTML页面标签为file类型的ID
  var files = ['bizLisnScanFile','credScanFile'];	<strong></strong><pre name="code" class="java" style="display: inline !important; ">var params = serializeObject($('#formcompany'));

  $.ajaxFileUpload({
  	            url: 'goxxxx',secureuri :false,fileElementId :files,//上传文件ID
  	            data: params,//表单值
  	            dataType : 'text',error:function(){
  					 window.location.href="500";//跳转到500页面
  				},success: function (result,status) {}