当然，以上的效果需要去重新给拖拽目标赋予新的元素，并且监听拖拽，释放等时间，编写用户自定义的逻辑。贴出自己的代码，一些事件和属性可以查阅jquery-ui的文档。
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="assets/css/bootstrap.css" />
<link rel="stylesheet" href="js/jquery-ui-1.12.1.dropable/jquery-ui.css" />
<script src="js/jquery-1.11.2.js"></script>
<script src="assets/js/bootstrap.js"/>
<script>
jQuery.noConflict(); //解决jQuery控制权冲突问题
</script>
<script src="js/jquery-ui-1.12.1.dropable/jquery-ui.js"></script>
<style> .selectable .ui-selecting{ background: #FECA40; }
.selectable .ui-selected{ background: #F39814; color: white; }
.selectable{ list-style-type: none; margin: 0; padding: 0; width: 80%; }
.selectable li{
list-style: none;
margin: 3px; padding: 0.4em; font-size: 1.4em; height: 32px;moz-user-select: -moz-none;
-moz-user-select: none;
-o-user-select:none;
-khtml-user-select:none;
-webkit-user-select:none;
-ms-user-select:none;
user-select:none;
}
.drag_info_box{
width:40px;
height:40px;
text-align: center;
font-size:14px;
line-height: 40px;
background: #21aeff;
color:#000000;
}
</style>
<script>
$(function(){
//自定义多选方法
var selected_begin_index,selected_end_index;
$("#mydrag").on("mousedown",".selectable>li",function(e){
var _selectable= $(this).parent();
if(!e.ctrlKey && !e.shiftKey){ //没有按下Ctrl或Shift键
if(!$(this).hasClass("ui-selected")){
_selectable.children("li").removeClass("ui-selected");
}
$(this).addClass("ui-selected");
selected_begin_index=_selectable.children("li").index(this);
}else if(e.ctrlKey && !e.shiftKey){ //只按下Ctrl键
$(this).addClass("ui-selected");
selected_begin_index=_selectable.children("li").index(this);
}else if((!e.ctrlKey && e.shiftKey) || (e.ctrlKey && e.shiftKey)){ //只按下Shift键或Ctrl和Shift键都按下
_selectable.children("li").removeClass("ui-selected");
$(this).addClass("ui-selected");
if(selected_begin_index!=undefined){
selected_end_index=_selectable.children("li").index(this);
}else{
selected_begin_index=_selectable.children("li").index(this);
}
