使用Ajax、json实现京东购物车结算界面的数据交互实例

<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>								 
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