ajaxupload.js是基于jquery开发的一块上传文件的方法，算是轻量级的插件，比较实用；
具体的还是看代码操作:
html部分
<!DOCTYPE HTML>
<html>
<head>
<Meta charset="UTF-8">
<title> 上传多张图片</title>
<style type="text/css">
.img-div{
border: 1px solid #ddd;
line-height: 1;
margin-left: 5px;
overflow: hidden;
padding:10px;
}
.file-wait-bar{
display:none;
padding:0 20px;
}
</style>
</head>
<body>
<link href="/lib/font-awesome_4.4.0/css/font-awesome.min.css" rel="stylesheet">
<script type="text/javascript" src="/lib/bootstrap_3.3.5/js/jquery.min.js"></script>
<script type="text/javascript" src="/lib/jquery_1.10/ajaxfileupload.js"></script>
<div class="img-div">
在此处上传：<input type="file" id="hqmsRelationupfile" name="hqmsRelationupfile" />
<input type="button" class="" value="导入">
<span class="file-wait-bar"><i class="fa fa-spinner fa-spin"></i></span>
</div>
<div>
在此处下载:
<ul id="ultestid">
<!--
<li><a target="_blank" href="/resources/fileuppackage/sunnytest/epr.newfw.episodelistuvpanel.csp.txt" download="test.txt">下载某个文件</a></li>
-->
</ul>
</div>
<div> </div>
</body>
<script type="text/javascript" src="/scripts/test.js"> </script>
</html>
对应的test.js
function dealfileurl(filename){
var p=filename.split("\\");
var namestr=p[p.length-1];
//$("ultestid").append("<li><b>nestr</b></li>");
//下载功能
var html='<li>';
html+='<a target="_blank" href="/resources/fileuppackage/sunnytest/'+namestr+'" download="test.txt">';
html+='下载'+namestr;
html+='</a></li>';
$("#ultestid").append(html);
return 1
}
$(function () {
$(":button").click(function () {
if ($("#hqmsRelationupfile").val().length > 0) {
var fileurl=$("#hqmsRelationupfile").val();
$("span.file-wait-bar").show();
ajaxFileUpload(fileurl);
}
else {
alert("请选择图片");
}
});
});
function ajaxFileUpload(filenamerul) {
$.ajaxFileUpload
(
{
url: '/csp/i-hqms/web.Biz.Proxy.sunnyfileup.cls',//用于文件上传的服务器端请求地址
type: 'post',data: { Id: 'upfile',name: 'filetest' },//可以附带一些需要的参数，此参数非常严谨，写错一个引号都不行
secureuri: false,//一般设置为false
fileElementId: 'hqmsRelationupfile',//文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'json',//返回值类型 一般设置为json
success: function (data,status) //服务器成功响应处理函数
{
dealfileurl(filenamerul);
//alert("上传"+data.outstr+"成功");
},complete:function(){
$(".file-wait-bar").hide();
},error: function (data,status,e)//服务器响应失败处理函数
{
alert("sunny 错误信息："+e);
}
}
)
return false;
}
ajaxupload.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" )
eval( "data = " + data );
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();
return data;
},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] );
}
}
})