jQuery实现简单的文件上传进度条效果

本文实例讲述了jQuery实现文件上传进度条效果的代码。分享给大家供大家参考。具体如下：
运行效果截图如下：

具体代码如下：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>upload</title>
<link rel="stylesheet" type="text/css" href="upload/upload.css">
<script type="text/javascript" src="upload/jquery.js"></script>
</head>
<body>
<span class="upload-span">开始上传文件</span>
<div class="upload-mask"></div>
<div class="upload-component">
<div class="upload-close">
<span class="upload-close-span">关闭</span>
</div>
<div class="upload-content">
<div class="progress">
<span class="upload-text"></span>
<span class="uploaded"></span>
</div>
<div class="confirm-cancel">
<span class="confirm">确认</span>
<span class="cancel">取消</span>
</div>
</div>
</div>
<script type="text/javascript" src="upload/upload.js"></script>
</body>
</html> 

CSS代码：

.upload-span{
display:inline-block;
width:120px;
height:40px;
color:#FFFFFF;
text-align: center;
line-height:40px;
background-color: blue;
border:2px solid blue;
border-radius:5px;
cursor: pointer;
letter-spacing:2px;
}
.upload-mask{
position: absolute;
top:0;
left:0;
z-index:9;
width:100%;
height:100%;
background-color: rgba(84,84,84,0.3);
display: none;
}
.upload-component{
position: absolute;
z-index:99;
top:50%;
left:50%;
margin-left:-120px;
margin-top:-60px;
width:240px;
height:120px;
background-color:#FFFFFF;
display:none;
}
.upload-close{
position: relative;
height:30px;
background-color: rgb(234,234,234);
}
.upload-close span{
position: absolute;
right:15px;
line-height:30px;
cursor: pointer;
}
.upload-content,.confirm-cancel{
margin-top:15px;
}
.progress{
position:relative;
width:90%;
height:22px;
margin-left:4.88888%;
text-align: center;
line-height:22px;
border:1px solid #ccc;
}
.upload-text{
position:absolute;
z-index:99999;
color:red;
}
.uploaded{
position:absolute;
left:0;
z-index:9999;
width:0%;
height:100%;
background-color: blue;
color:#FFFFFF;
}
.confirm-cancel span{
display:inline-block;
width:60px;
height:30px;
line-height:30px;
text-align: center;
background-color:#ccc;
cursor:wait;
}
.confirm{
margin-left:40%;
}
.cancel{
margin-left:10px;
}

jQuery代码：

$(function (){
var $uploadSpan = $('.upload-span');
var $uploadMask = $('.upload-mask');
var $uploadContent = $('.upload-component');
var $closeConfirmCancel = $('.upload-close-span,.confirm,.cancel');
var $uploadTextSpan = $('.upload-text');
function showMask(){
$(".upload-mask,.upload-component").css({display:'block'});
progressBar();
$uploadSpan.off('click',showMask);
}
function hiddenMask(){
$uploadMask.css({display:'none'});
$uploadSpan.on('click',showMask);
}
function closeConfirmCancel(){
$uploadContent.css({display:'none'});
$uploadTextSpan.text('').next().css({width:0});
hiddenMask();
}
// 模拟进度
function progressBar(){
var max =100;
var init =0;
var uploaded;
var test = setInterval(function(){
init +=5;
uploaded = parseInt(init / max *100)+'%';
$uploadTextSpan.text(uploaded).next().css({width:uploaded});
if(init ===100){
clearInterval(test);
$uploadTextSpan.text('上传完成');
$('.confirm-cancel span').css({cursor:'pointer'});
$('.confirm').css({backgroundColor:'rgb(111,197,293)'});
$('.cancel').css({backgroundColor:'rgb(175,194,211)'})
$closeConfirmCancel.on('click',closeConfirmCancel);
}
else{
$closeConfirmCancel.off('click',closeConfirmCancel);
$('.upload-close-span').on('click',function(){
clearInterval(test);
closeConfirmCancel();
});
}
},1000);
}
$uploadSpan.on('click',showMask);
})

JQuery实现文件上传进度条，能显示上传的百分比等信息，内容就到这里了，希望大家能够喜欢。