使用Ajax、json实现京东购物车结算界面的数据交互实例

<div class="goodsList_menu">
 <div class="goodsList">
 <div class="goodsListfl">
 <input class="fl" style="margin:15px 10px 0 10px;" type="checkbox" name="" />
 <ul>
 <li>全选</li>
 <li>商品</li>
 </ul>
 </div>
 <div class="goodsListfr fr">
 <ul>
 <li>单价</li>
 <li class="w100">数量</li>
 <li class="w100">小计</li>
 <li>操作</li>
 </ul>
 </div>
 </div>
 <!--内容-->
 <div class='goodsListbox'></div>
 <div class="checkout">
 <div class="checkoutleft">
 <input class="fl" style="margin:21px 10px 0 10px;" type="checkbox" name="" />
 <ul>
 <li>全选</li>
 <li>删除选中产品</li>
 </ul>
 </div>
 <div class="checkoutright fr">
 <span>总价：<b>￥</b></span><span class="checkoutSum">0</span>
 <input type="button" value="去结算" />
 </div>
 </div>
 </div>

body,html,ul,li,a{
 margin:0;padding:0;font-family:"microsoft yahei";list-style:none;text-decoration:none;
}
.fl{
 float:left;
}
.fr{
 float:right;
}
.f12{
 font-size:12px;
}
.disl{
 display:inline-block;
}
.w100{
 width:100px;
}
.fw{
 font-weight:bold;
}
.goodsList_menu{
 width:990px;height:45px;background:#f3f3f3;margin:0 auto;line-height:45px;
 font-size:14px;color:#333;border:1px solid #ddd;
}
.goodsList_menu .goodsListfl ul li{
 float:left;margin-right:80px;cursor:pointer;
}
.goodsList_menu .goodsListfr ul li{
 float:left;margin-right:37px;text-align:center;cursor:pointer;
}
/*内容*/
.goodsList_content{
 width:100%;height:80px;border-bottom:1px solid #eee;padding:20px 0;margin-top:40px;
}
.goodsList_content .disl{
 line-height:20px;width:300px;cursor:pointer;margin-left:10px;
}
.goodsList_content .disl span:hover{
 color:#e4393c;
}
.goodsList_content .disl p:hover{
 color:#e4393c;
}
.goodsListnum .listNum{
 widows:45px;height:21px;width:50px;border:1px solid #eee;text-align:center;
 outline:none;
}
.goodsListnum ul li{
 float:left;margin-right:30px;text-align:center;cursor:pointer;
}
.goodsListnum ul li a{
 border:1px solid #ddd;padding:2px 7px;color:#000;
}
.goodsListnum ul li p{
 line-height:0;color:#666;font-size:12px;margin-top:-2px;
}
.buy_goods p{
 background:url(../images/arrow.png)no-repeat;padding-left:30px;background-position:-20px -20px;
}
.buy_goods{
 position:relative;
}
/*底部结账*/
.checkout{
 height:55px;border:1px solid #eee;margin-top:20px;line-height:55px;
}
.checkout .checkoutleft ul li{
 float:left;margin-right:10px;cursor:pointer;
}
.checkout .checkoutSum{
 font-weight:bold;font-size:18px;color:#e64346;
}
.checkout .checkoutright input{
 border:none;color:#fff;outline:none;width:100px;height:55px;line-height:55px;
 font-size:20px;background:#e64346;margin-left:50px;cursor:pointer;
}

<script>
 $.ajax({
 type:"get",
 url:"jd.json",
 dataType:"json",
 success:function(data){
 var list = data.list;//拿到list数组
 //console.log(list);
 for(var i=0;i<list.length;i++){
 var numArray = list[i];
 numArray.price = (numArray.price).toFixed(2);
 var text = "<div class='goodsList_content'><div class='fl buy_goods'>"+
 "<input class='fl' style='margin:15px 10px 0 10px;' type='checkbox' name='' />"+
 "<img align='top' src='images/1.jpg' /><div class='disl'>"+
 "<span>"+numArray.description+"</span><p class='f12'>购买礼品服务</p></div>"+
 "<div class='disl' style='width:auto;position:absolute;right:-100px;top:0;'>"+
 "<span>"+numArray.color+"</span></div></div>"+
 "<div class='fr goodsListnum' style='margin-top:-12px;'>"+
 "<ul><li><b>￥</b><span class='fw'>"+numArray.price+"</span></li>"+
 "<li class='w100'><a class='minus' onClick='minus(this);' href='javascript:void(0);'>-</a>"+
 "<input value='1' class='listNum' /><a class='add' onClick='add(this)' href='javascript:void(0);'>+</a><p>有货</p></li>"+
 "<li class='w100'><b>￥</b><span id='sub' class='fw'>"+numArray.price*numArray.quentity+"</span></li>"+
 "<li><a style='border:none;color:#666;' href='javascript:void(0);'>删除</a></li>"+
 "</ul></div></div>"
 $(text).appendTo(".goodsListbox");
 }
 },
 error:function(){
 console.log("调用数据失败！");
 }
 });
 var listNum,price,sums,sub1,sub2;
 function add(obj){
 listNum = $(obj).prev().val();//input值
 listNum = parseInt(listNum);
 var num = parseInt(listNum+1);//input值每次+1
 $(obj).prev().val(num);
 price = $(obj).parent().prev().children('span').text();//找到单价
 price = parseInt(price);//转换成number类型
 price = price.toFixed(2);
 sums = $(obj).parent().next().children('span').text()//找到总金额
 sums = parseInt(sums);
 console.log(typeof sums);
 $(obj).parent().next().children('span').text(price*num);

 sub1 = $(".goodsList_content:eq(0)").find("#sub").text();
 sub2 = $(".goodsList_content:eq(1)").find("#sub").text();
 sub1 = parseInt(sub1);
 sub2 = parseInt(sub2);
 var res = $(".checkoutright .checkoutSum").text((sub1+sub2).toFixed(2));
 }
 
 function minus(obj){
 listNum = $(obj).next().val();
 listNum = parseInt(listNum);
 if(listNum<=1){
 listNum==1;
 }else{
 --listNum;
 }
 $(obj).next().val(listNum);
 price = $(obj).parent().prev().children('span').text();//找到单价
 price = parseInt(price);//转换成number类型
 price = price.toFixed(2);
 sums = $(obj).parent().next().children('span').text()//找到总金额
 sums = parseInt(sums);
 $(obj).parent().next().children('span').text(price*listNum);
 $(".checkoutright .checkoutSum").text(price*listNum);
 sub1 = $(".goodsList_content:eq(0)").find("#sub").text();
 sub2 = $(".goodsList_content:eq(1)").find("#sub").text();
 sub1 = parseInt(sub1);
 sub2 = parseInt(sub2);
 $(".checkoutright .checkoutSum").text(sub1+sub2);
 }
 </script>