ε=(･д･｀*)ﾊｧ… 简单而粗暴的无刷新上传图片，前端效果如下面：
Paste_Image.png
亲测可以上传图片：
Paste_Image.png
（＾-＾）那就不多废话啦，直接上代码
首先在站点目录下创建以下文件夹 为了方便复制代码 样式脚本都置于index.html里面了٩(๑`н´๑)۶：
Paste_Image.png
index.html：
<!DOCTYPE html>
<html>
<head>
<title>楸木的小猫不吃渔</title>
<link rel="stylesheet" type="text/css" href="./accets/css/style.css">
<style>
.Upload_picture{
position: fixed;
left: 0;
right: 0;
display: none;
top: 0;
bottom: 0;
background: rgba(0, 0, 0, .3);
z-index: 99999;
}
.Upload_pictureaduto{
width: 800px;
height: 500px;
background: #fff;
margin: 200px auto;
}
.Upload_picturetitle{
height: 40px;
padding: 0px 10px;
border-bottom: 1px solid #ccc;
line-height: 40px;
}
.Upload_picturetitle h1{
font-size: 18px;
float: left;
color: #fb5609;
}
.Upload_picturetitle span{
float: right;
font-size: 18px;
color: #fb5609;
}
.addbtn{position: relative;overflow: hidden;margin-right: 4px;display:inline-block;
*display:inline;padding:4px 10px 4px;font-size:14px;line-height:18px;
*line-height:20px;color:#fff;
text-align:center;vertical-align:middle;cursor:pointer;background:#5bb75b;
border:1px solid #cccccc;border-color:#e6e6e6 #e6e6e6 #bfbfbf;
border-bottom-color:#b3b3b3;-webkit-border-radius:4px;
-moz-border-radius:4px;border-radius:4px;}
.addbtn input{position: absolute;top: 0; right: 0;margin: 0;border:solid transparent;
opacity: 0;filter:alpha(opacity=0); cursor: pointer;}
.progress{position:relative; margin-left:200px; margin-top:-24px;
width:200px;padding: 1px; border-radius:3px; display:none}
.bar {background-color: green; display:block; width:0%; height:20px;
border-radius:3px; }
.percent{position:absolute; height:20px; display:inline-block;
top:3px; left:2%; color:#fff }
.files{height:22px; line-height:22px; margin:10px 0}
.delimg{margin-left:20px; color:#090; cursor:pointer}
.Alcohol2 a img,#showimg img{
width: 191px;
height: 188px;
}
.Keyshoppingcart{
cursor: pointer;
margin-right: 20px;
float: left;
/* width: 100px; */
background: #ef7d48;
height: 40px;
line-height: 40px;
/* margin-bottom: 20px; */
color: #fff;
-moz-border-radius: 10px;
-webkit-border-radius: 4px;
border-radius: 4px;
margin-top: 20px;
padding: 0px 10px;
font-size: 18px;
}
.updiy{
cursor: pointer;
margin-right: 20px;
float: left;
/* width: 100px; */
background: #ef7d48;
height: 40px;
line-height: 40px;
/* margin-bottom: 20px; */
color: #fff;
-moz-border-radius: 10px;
-webkit-border-radius: 4px;
border-radius: 4px;
margin-top: 20px;
padding: 0px 10px;
font-size: 18px;
}
</style>
</head>
<body>
<div class="Alcohol2">
点我上传
</div>
<div class="Upload_picture">
<div class="Upload_pictureaduto">
<div class="Upload_picturetitle"><h1>上传一张图片</h1><span>X</span></div>
<div class="Upload_picturecenter">
<div class="addbtn">
<span>添加附件</span>
<input id="fileupload" type="file" name="mypic">
</div>
<div class="progress">
<span class="bar"></span><span class="percent">0%</span >
</div>
<div class="files"></div>
<div id="showimg"></div>
</div>
</div>
</div>
</body>
<script src="http://libs.baidu.com/jquery/1.11.3/jquery.min.js"></script>
<script src="http://www.helloweba.com/demo/upload/jquery.form.js"></script>
<script type="text/javascript">
$(function () {
var bar = $('.bar');
var percent = $('.percent');
var showimg = $('#showimg');
var progress = $(".progress");
var files = $(".files");
var btn = $(".btn span");
$("#fileupload").wrap("<form id='myupload' action='function.php'method='post' enctype='multipart/form-data'></form>");
$("#fileupload").change(function(){ //选择文件
$("#myupload").ajaxSubmit({
dataType: 'json', //数据格式为json
beforeSend: function() { //开始上传
showimg.empty(); //清空显示的图片
progress.show(); //显示进度条
var percentVal = '0%'; //开始进度为0%
bar.width(percentVal); //进度条的宽度
percent.html(percentVal); //显示进度为0%
btn.html("上传中..."); //上传按钮显示上传中
},
uploadProgress: function(event, position, total, percentComplete) {
var percentVal = percentComplete + '%'; //获得进度
bar.width(percentVal); //上传进度条宽度变宽
percent.html(percentVal); //显示上传进度百分比
},
success: function(data) { //成功
//获得后台返回的json数据，显示文件名，大小，以及删除按钮
files.html("<b>"+data.name+"("+data.size+"k)</b><span class='delimg' rel='"+data.pic+"'>删除</span>");
//显示上传后的图片
var img = "public/"+data.pic;
showimg.html("![]("+img+")");
$('.Alcohol2 a img').attr('src',img);
btn.html("添加附件"); //上传按钮还原
},
error:function(xhr){ //上传失败
btn.html("上传失败");
bar.width('0');
files.html(xhr.responseText); //返回失败信息
}
});
});
$(document).on("click", ".delimg", function() {
var pic = $(this).attr("rel");
$.post("function.php?act=delimg",{imagename:pic},function(msg){
if(msg==1){
files.html("删除成功.");
showimg.empty(); //清空图片
progress.hide(); //隐藏进度条
}else{
alert(msg);
}
});
});
})
$(document).on("click", ".Alcohol2", function() {
$('.Upload_picture').css('display','block');
})
$(document).on("click", ".Upload_picturetitle span", function() {
$('.Upload_picture').css('display','none');
})
</script>
</html>
function.php :
<?php
@$action = $_GET['act'];
if($action=='delimg'){ //删除图片
$filename = $_POST['imagename'];
if(!empty($filename)){
unlink('./public/'.$filename);
echo '1';
}else{
echo '删除失败.';
}
}else{ //上传图片
$picname = $_FILES['mypic']['name'];
$picsize = $_FILES['mypic']['size'];
if ($picname != "") {
if ($picsize > 512000) { //限制上传大小
echo '图片大小不能超过500k';
exit;
}
$type = strstr($picname, '.'); //限制上传格式
if ($type != ".gif" && $type != ".jpg" && $type != ".png") {
echo '图片格式不对！';
exit;
}
$rand = rand(100, 999);
$pics = date("YmdHis") . $rand . $type; //命名图片名称
//上传路径
$pic_path = "./public/". $pics;
move_uploaded_file($_FILES['mypic']['tmp_name'], $pic_path);
}
$size = round($picsize/1024,2); //转换成kb
$arr = array(
'name'=>$picname,
'pic'=>$pics,
'size'=>$size
);
echo json_encode($arr); //输出json数据
}
（〜㉨)〜 到这里就完成了哦，如果此文章对你有用，记得要加群哦，大家一起进步交流 。（PHP+JS+UI--交流/招聘 499125737）
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