ajaxFileUpload使用及注意点

html：

<div class="page-content">
	<div class="page-header">
		<h1>
			订奶管理
			<small>
				<i class="icon-double-angle-right"></i>
				导入订奶
			</small>
		</h1>
	</div><!-- /.page-header -->
	<script type="text/javascript" src="/js/ajaxfileupload.js"></script>
	<div class="alert alert-danger" role="alert">
		<span class="red">为保证<span class="blue">顺利</span>导入数据，请使用<span class="blue">word2003</span>标准格式</span><br>
		<span class="red">文件大小不能超过<span class="blue">1M</span></span><br>
		<span class="red">内容格式请<span class="blue">严格</span>遵守 模板格式。</span><br>
		<span class="red">正式内容不能包含非法字符、函数、注释、颜色等</span><br>
		<span class="red">如导入失败，请仔细检查以上几条..</span>
	</div>
	<div class="col-sm-12">
		<form action="/wxbackend/milk/importExcel" method="post" enctype="multipart/form-data">
			<div class="widget-main" style="width:580px;margin:0;padding:0;">
				<input type="file" name="excelFile" id="excelFile" >
			</div>
			<button type="button" id="submit" onclick="ajaxFileUpload()" class="btn btn-info"><i class="icon-ok bigger-110"></i>导入</button>
			<a href="javascript: window.location.reload()" id="refersh" class="btn btn-inverse"><span class="glyphicon glyphicon-refresh"></span> 刷新页面</a>
			<img id="loading" src="/images/loading.gif" style="display:none;">
		</form>
	</div>
</div>

<script type="text/javascript">
	jQuery(function($) {
		$('#excelFile').ace_file_input({
			no_file:'请选择Excel文件..',btn_choose:'Choose',btn_change:'Change',droppable:false,onchange:null,thumbnail:false,//| true | large
			//whitelist:'jpg|jpeg',//blacklist:'exe|php|dll',//onchange:''
			//
		});
	});

	function ajaxFileUpload(){
		var excelFile = $('#excelFile').val();
		if(excelFile == '') {
			alert('请选择Excel文件..');
			return false;
		}
		if(excelFile.lastIndexOf('.') > 0) {
			var ext = excelFile.substr(excelFile.lastIndexOf('.')+1);
			if(!(ext == 'xls')){
				alert('请选择Excel类型文件..');
				return false
			}
		}
		/**
		$("#loading")
		.ajaxStart(function(){
			$(this).show();
		})
		.ajaxComplete(function(){
			$(this).hide();
		});*/
		$("#loading").show();
		document.getElementById('submit').disabled = true;
		document.getElementById('refersh').disabled = true;
		$.ajaxFileUpload(
		{
				url:'/wxbackend/milk/importExcel',secureuri:false,fileElementId:'excelFile',dataType: 'text',success: function (data){
					$("#loading").hide();
					if(data.substr(0,2) == '99') {
						var row = data.substring(3,data.length);
						data = '99';
						info = '文件导入错误，数据不完整或含有非法字符，请检查后再试，Excel第 '+row+' 行';
					}
					switch (data){
						case '0':
							alert('文件类型错误，请使用word2003兼容格式');
						break;
						case '-1':
							alert('网络错误，请在网络良好的情况下再试');
						break;
						case '99':
							alert(info);
						break;
						case '-2':
							alert('文件没有读取权限，请联系管理员');
						break;
						case '-3':
							alert('非法上传！！');
						break;
						case '-4':
							alert('文件内容格式不正确，请严格按照模板文件');
						break;
						case '-4':
							alert('文件大小不能超过1M');
						break;
						case '1':
							alert('导入成功，订奶用户下去查看');
						break;
						default :
							alert('导入失败，未知错误，请联系管理员');
						break;
					}
					if(data == '1')
						window.location.href="/wxbackend/milk/milkOrderList?is_import=1";
					else window.location.reload();
				},error: function (data,status,e){
					$("#loading").hide();
					document.getElementById('submit').disabled = false;
					document.getElementById('refersh').disabled = false;
					alert(e);
					window.location.reload();
				}
			}
		)
		return false;
	}
	</script>

高版本的jquery 已没有handleError 方法 所以在ajaxfileupload.js的uploadHttpData方法后面加上：

handleError: function( s,xhr,e ) {
	    // If a local callback was specified,fire it
	    if ( s.error ) {
	        s.error.call( s.context || window,e );
	    }

	    // Fire the global callback
	    if ( s.global ) {
	        (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError",[xhr,s,e] );
	    }
	}

jQuery.extend({
	

    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);			
    },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);
			}			
		}		
		var oldElement = jQuery('#' + fileElementId);
		var newElement = jQuery(oldElement).clone();
		jQuery(oldElement).attr('id',fileId);
		jQuery(oldElement).before(newElement);
		jQuery(oldElement).appendTo(form);


		
		//set attributes
		jQuery(form).css('position','absolute');
		jQuery(form).css('top','-1200px');
		jQuery(form).css('left','-1200px');
		jQuery(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,(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 () {}};	

    },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;
    },handleError: function( s,e] );
	    }
	}
})

（编辑：李大同）

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