该博客介绍了一种使用jQuery实现的多图上传预览功能，允许用户点击添加图片进行叠加上传，并且能够单独删除每张图片。在修改时，只上传新增的图片，不重复发送已存在的图片数据。此解决方案适用于需要此类功能的开发者。
html部分
<!DOCTYPE html>
<html>
<title>jQuery多图片增删改查</title>
<body>
<aside class="mask works-mask">
<div class="mask-content">
<p class="del-p ">您确定要删除图片吗？</p>
<p class="check-p"><span class="del-com wsdel-ok">确定</span><span class="wsdel-no">取消</span></p>
</div>
</aside>
<form action="shopUsers/profile" method="post" id="basicForm" class="smart-form"
enctype="multipart/form-data" name="basicForm" novalidate="novalidate">
<div class="img-box full">
<section class=" img-section">
<p class="up-p"><span class="up-span">商户门头照</span></p>
<div class="z_photo upimg-div clear" >
<section class="z_file fl">
<img src="${path}/upload/img/a11.png" class="add-img">
<input type="file" id="door" class="file" accept="image/*" multiple />
</section>
</div>
</section>
</div>
<footer>
<button type="button" class="btn btn-primary" οnclick="shopHistory()"> 提交</button>
</footer>
</form>
<script src="js/jquery-1.8.3.min.js"></script>
</body>
</html>var door = {}; //用于上传的图片流
$(function(){
var delParent;
var defaults = {
fileType : ["jpg","png","bmp","jpeg"], // 上传文件的类型
fileSize : 1024 * 1024 * 10 // 上传文件的大小 10M
};
/*点击图片的文本框*/
$(".file").change(function(){
var idFile = $(this).attr("id");
var file = document.getElementById(idFile);
var imgContainer = $(this).parents(".z_photo"); //存放图片的父亲元素
var fileList = file.files; //获取的图片文件
var input = $(this).parent();//文本框的父亲元素
var imgArr = [];
//遍历得到的图片文件
var numUp = imgContainer.find(".up-section").length;
var totalNum = numUp + fileList.length; //总的数量
if(fileList.length > 5 || totalNum > 5 ){
alert("上传图片数目不可以超过5个，请重新选择"); //一次选择上传超过5个 或者是已经上传和这次上传的到的总数也不可以超过5个
}
else if(numUp < 5){
fileList = validateUp(fileList);
for(var i = 0;i<fileList.length;i++){
var imgUrl = window.URL.createObjectURL(fileList[i]);
imgArr.push(imgUrl);
var $section = $("<section class='up-section fl loading'>");
imgContainer.prepend($section);
var $span = $("<span class='up-span'>");
$span.appendTo($section);
var $img0 = $("<img class='close-upimg'>").on("click",function(event){
event.preventDefault();
event.stopPropagation();
$(".works-mask").show();
delParent = $(this).parent();
});
$img0.attr("src","../upload/img/a7.png").appendTo($section);
var $img = $("<img class='up-img up-opcity'>");
$img.attr("src",imgArr[i]);
$img.appendTo($section);
var $p = $("<p class='img-name-p'>");
$p.html(fileList[i].name).appendTo($section);
door[fileList[i].name] = fileList[i]; //流存储
var $input = $("<input id='taglocation' name='taglocation' value='' type='hidden'>").attr("value",imgArr[i]);
$input.appendTo($section);
var $input2 = $("<input id='tags' name='tags' value='' type='hidden'/>");
$input2.appendTo($section);
}
}
setTimeout(function(){
$(".up-section").removeClass("loading");
$(".up-img").removeClass("up-opcity");
},450);
numUp = imgContainer.find(".up-section").length;
if(numUp >= 5){
$(this).parent().hide();
}
}
});
$(".z_photo").delegate(".close-upimg","click",function(){
$(".works-mask").show();
delParent = $(this).parent();
});
$(".wsdel-ok").click(function(){
$(".works-mask").hide();
var numUp = delParent.siblings().length;
if(numUp < 6){
delParent.parent().find(".z_file").show();
}
var key=delParent.find(".img-name-p").html();
var id=delParent.parent().find(".file").attr("id");
if(id=='door'){
delete door[key];
}
if(!isNaN(key)) { //这里判断key是否在远端存在，不需要单独上传这步可以省略
$.post("shopUsers/delImage",{id:key,state:2},function(data){
});
}
delParent.remove();
});
$(".wsdel-no").click(function(){
$(".works-mask").hide();
});
function validateUp(files){
var arrFiles = [];//替换的文件数组
for(var i = 0, file; file = files[i]; i++){
//获取文件上传的后缀名
var newStr = file.name.split("").reverse().join("");
if(newStr.split(".")[0] != null){
var type = newStr.split(".")[0].split("").reverse().join("");
// 类型符合，可以上传
if (file.size >= defaults.fileSize) {
alert(file.size);
alert('您这个"'+ file.name +'"文件大小过大');
} else {
arrFiles.push(file);
}
}else{
alert('您这个"'+ file.name +'"没有类型, 无法识别');
}
}
return arrFiles;
}
});
// 提交
var shopHistory=function () {
// 上传的流存储进要传递数据当中
var fm=document.getElementById('basicForm');
var test=new FormData(fm);
for(var ab in door){
test.append("door", door[ab]);
}
$.ajax({
url:"shopUsers/profile",
type:"post",
data:test ,
cache: false,
processData: false,
contentType: false,
async: false,
success:function(resp){
$form.find(".state-success").removeClass("state-success");
}
});
}
//遍历填充信息
var shopUsersImage=服务器返回的数据；
if (shopUsersImage) {
//循环填充数据
var numUp;
$.each(shopUsersImage, function (index, value) {
var ids = $("#" + value.type).parents(".z_photo");
var $section = $("<section class='up-section fl'>");
var $img0 = $("<img class='close-upimg'>").attr("src", "../upload/img/a7.png");
var $img = $("<img class='up-img' width=190 height=180>").attr("src", "../" + value.imageMin);
var $p = $("<p class='img-name-p'>").html(value.id);
var $section0 = $(" </section>");
$section.append($img0).append($img).append($p).append($section0);
$(ids).prepend($section);
// 判断数量是否超过允许上传量
numUp = $(ids).find(".up-section").length;
if (value.type == 'other') {
if (numUp >= 10) {
$("#" + value.type).parent().hide();
}
} else {
if (numUp >= 5) {
$("#" + value.type).parent().hide();
}
}
});
}* {
box-sizing: border-box;
-moz-box-sizing: border-box;
/* Firefox */
-webkit-box-sizing: border-box;
/* Safari */
}
.up-section .type-upimg{
display: none;
}
::-ms-clear,::-ms-reveal{display:none;}
textarea{
outline: none;
line-height: 14px;
padding-left: 4px;
padding-top: 4px;
border: 1px solid #ccc;
color: #444;
font-size: 14px;
outline: none;
text-align: left;
}
.overflow{
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
button{
outline: none;
border: 0px;
font-family: "微软雅黑", "PingFang SC", "arial, helvetica, sans-serif";
}
input{
font-family: "微软雅黑", "PingFang SC", "arial, helvetica, sans-serif";
outline: none;
}
a {
outline: none;
}
a,button{cursor:pointer;}
body {
background: #f4f4f4;
font-size: 14px;
font-family: "微软雅黑", "PingFang SC", "arial, helvetica, sans-serif";
}
.clear {
clear: both;
}
.full{
margin: 0 30px;
}
.full-big{
margin: 0 auto;
}
.img-full{
display: block;
width: 80%;
}
::-webkit-input-placeholder {
color: #777;
font-size: 14px;
}
:-moz-placeholder {
/* Firefox 18- */
color: #777;
font-size: 14px;
}
::-moz-placeholder {
/* Firefox 19+ */
color: #777;
font-size: 14px;
}
:-ms-input-placeholder {
color:#777;
font-size: 14px;
}
/* ====clear float====== */
/*nav a:visited{color: rgb(65,65,65);}
aside a:visited{color: rgb(65,65,65);}*/
.fl {
float: left;
}
.fr {
float: right;
}
.clear:after {
content: '';
display: block;
clear: both;
}
/* reset */
.pic img{display: none;}
i,
p,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
br,
em,
dl,
dd,
li,
ul,
ol,
td,
th,
pre,
form,
body,
input,
strong,
textarea,
select,figcaption,figure{
margin: 0;
padding: 0;
}
em {
font-style: normal
}
li {
list-style: none
}
a {
text-decoration: none;
}
img {
border: none;
}
table {
border-collapse: collapse;
}
textarea {
resize: none;
overflow: auto;
}
a,button{cursor:pointer;}
/*上传图片插件的样式*/
.img-box{
margin-top: 40px;
}
.img-box .up-p{
margin-bottom: 20px;
font-size: 16px;
color: #555;
}
.z_photo{
padding: 18px;
border:2px dashed #E7E6E6;
/*padding: 18px;*/
}
.z_photo .z_file{
position: relative;
}
.z_file .file{
width: 100%;
height: 100%;
opacity: 0;
position: absolute;
top: 0px;
left: 0px;
z-index: 100;
}
.z_photo .up-section{
position: relative;
margin-right: 20px;
margin-bottom: 20px;
}
.up-section .close-upimg{
position: absolute;
top: 6px;
right: 8px;
display: none;
z-index: 10;
}
.up-section .up-span{
display: block;
width: 100%;
height: 100%;
visibility: hidden;
position: absolute;
top: 0px;
left: 0px;
z-index: 9;
background: rgba(0,0,0,.5);
}
.up-section:hover{
border: 2px solid #f15134;
}
.up-section:hover .close-upimg{
display: block;
}
.up-section:hover .up-span{
visibility: visible;
}
.z_photo .up-img{
display: block;
width: 100%;
height: 100%;
}
.loading{
border: 1px solid #D1D1D1;
background:url("/kuaibeiPro/manage/resources/js/plugs/msgbox/loading.gif") no-repeat center;
}
.up-opcity{
opacity: 0;
}
.img-name-p{
display: none;
}
.upimg-div .up-section {
width: 190px;
height: 180px;
}
.img-box .upimg-div .z_file {
width: 190px;
height: 180px;
}
.z_file .add-img {
display: block;
width: 190px;
height: 180px;
}
/*遮罩层样式*/
.mask{
z-index: 1000;
display: none;
position: fixed;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
background: rgba(0,0,0,.4);
}
.mask .mask-content{
width: 500px;
position: absolute;
top: 50%;
left: 50%;
margin-left: -250px;
margin-top: -80px;
background: white;
height: 160px;
text-align: center;
}
.mask .mask-content .del-p{
color: #555;
height: 94px;
line-height: 94px;
font-size: 18px;
border-bottom: 1px solid #D1D1D1;
}
.mask-content .check-p{
height: 66px;
line-height: 66px;
position: absolute;
bottom: 0px;
left: 0px;
width: 100%;
}
.mask-content .check-p span{
width: 49%;
display:inline-block;
text-align: center;
color:#d4361d ;
font-size: 18px;
}
.check-p .del-com{
border-right: 1px solid #D1D1D1;
}
这是我在看到别人写的jQuery带删除功能多图片上传预览插件根据自己的需求进行了修改,主要内容是多图上传，点击加图片可以叠加上传，修改时只会上传新增的图片，删除图片是采用单张单张删除，有需要的可以进行参考。
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