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>