今天公司项目需要文件上传，网上查了些资料及报的好多问题，今天顺便把他整理一下，以便以后使用和帮助需要帮助的人

HTML代码

引入js文件

jquery.min.js

ajaxfileupload.js

<table>

<tr>
<td align="center">效果图</td>
<td colspan="3">

<!--name属性必须加，我调试了半天没加name属性上传会出问题，没有拿到上传文件-->
<input type="file" id="effectImage" name="effectImage"/>
<input type="button" value="上传" onclick="uploadImageFile('effectImage','effectImageShow','/action');"/>
<div id="effectImageShow" style="width:100%;"></div>
</td>
</tr>
<tr>
<td align="center">交通图</td>
<td colspan="3">
<input type="file" id="trafficImage" name="trafficImage"/>
<input type="button" value="上传" onclick="uploadImageFile('trafficImage','trafficImageShow','/action');"/>
<div id="trafficImageShow" style="width:100%;"></div>
</td>
</tr>
<tr>
<td align="center">户型图</td>
<td colspan="3">
<input type="file" id="houseImage" name="houseImage"/>
<input type="button" value="上传" onclick="uploadImageFile('houseImage','houseImageShow','/action');"/>
<div id="houseImageShow" style="width:100%;"></div>
</td>
</tr>
<tr>
<td align="center">实景图</td>
<td colspan="3">
<input type="file" id="realImage" name="realImage"/>
<input type="button" value="上传" onclick="uploadImageFile('realImage','realImageShow','/action');"/>
<div id="realImageShow" style="width:100%;"></div>
</td>
</tr>
<tr>
<td align="center">样板房</td>
<td colspan="3">
<input type="file" id="modelImage" name="modelImage"/>
<input type="button" value="上传" onclick="uploadImageFile('modelImage','modelImageShow','/action');"/>
<div id="modelImageShow" style="width:100%;"></div>
</td>
</tr>

</table>

js文件代码

/**
* 上传图片
* @param id 上传控件id 如：<input type="file" id="trafficImage"/> id=trafficImage
* @param showId 图片上传成功后显示id
*/
function uploadImageFile(id,showId,url) {

if(!$("#"+id).val()){
alert( "请选择所要上传的文件!");
return false;
}

$.ajaxFileUpload({
url : url,
secureuri : false,
fileElementId : id,
dataType : "json",
success : function(data,status) {
alert("上传成功！");
$("#" + showId).append('<span id="'+data.id+'"><a href="' +data.href+ '">'
+ data.name + '</a>&nbsp;&nbsp;<a href="javascript:void(0);" onclick="deleteUploadImageTag(\''
+ showId +'\',\'' + data.id + '\');">删除</a>&nbsp;&nbsp;</span>');
},
error : function(data,status,e) {
alert( "上传失败:" + data.msg);
}
});

}

/**
* 删除
* @param showId
* @param spanId
*/
function deleteUploadImageTag(showId,spanId){
$('#'+ showId + ' span[id='+ spanId +']').remove();
}

ajaxfileupload.js

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" )

//返回的json串前加了这句代码<pre style="word-wrap: break-word; white-space: pre-wrap;">返回的Json<pre>
/**-----处理上传返回的json格式 start----**/
if(data.indexOf('{') != -1){
data = data.substring(data.indexOf('{'),data.lastIndexOf('}')+1);
}
/**-----处理上传返回的json格式 end----**/
eval( "data = " + data );
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();

return data;
},

// jquery高版本没有此函数，将低版本的此函数复制过来解决handleError错误

handleError: function( s,xhr,e ) { // If a local callback was specified,fire it if ( s.error ) { s.error.call( s.context || s,e ); } // Fire the global callback if ( s.global ) { (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError",[xhr,s,e] ); } } })