jQuery实现购物车计算价格统计功能javascriptweixin37592187的博客-

jQuery实现购物车计算价格统计功能

#功能介绍

进入界面，刷新触发onload方法跳转到JS代码，可以对购物车内商品数量进行增加-减少，商品价格自动统计、当更改商品数量的输入框value值时，整个购物表商品的价格，商品的小计和总计会根据数量发生变化。

话不多说直接上代码

 <style type="text/css">         *{margin:0;padding:0;list-style-type:none;}         a{color:#666;text-decoration:none;}         table{border-collapse:collapse;border-spacing:0;border:0;}         body{color:#666;font:12px/180% Arial, Helvetica, sans-serif, "新宋体";}         clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden}         .clearfix{display:inline-table}         *html .clearfix{height:1%}         .clearfix{display:block}         *+html .clearfix{min-height:1%}         .fl{float:left;}         .fr{float:right;}         .catbox{width:940px;margin:100px auto;}         .catbox table{text-align:center;width:100%;}         .catbox table th,.catbox table td{border:1px solid #CADEFF;}         .catbox table th{background:#e2f2ff;border-top:3px solid #a7cbff;height:30px;}         .catbox table td{padding:10px;color:#444;}         .catbox table tbody tr:hover{background:RGB(238,246,255);}         .checkbox{width:60px;}         .check-all{ vertical-align:middle;}         .goods{width:300px;}         .goods span{width:180px;margin-top:20px;text-align:left;float:left;}         .goods img{width:100px;height:80px;margin-right:10px;float:left;}         .price{width:130px;}         .count{width:90px;}         .count .add, .count input, .count .reduce{float:left;margin-right:-1px;position:relative;z-index:0;}         .count .add, .count .reduce{height:23px;width:17px;border:1px solid #e5e5e5;background:#f0f0f0;text-align:center;line-height:23px;color:#444;}         .count .add:hover, .count .reduce:hover{color:#f50;z-index:3;border-color:#f60;cursor:pointer;}         .count input{width:50px;height:25px;line-height:15px;border:1px solid #aaa;color:#343434;text-align:center;padding:4px 0;background-color:#fff;z-index:2;}         .subtotal{width:150px;color:red;font-weight:bold;}         .operation span:hover,a:hover{cursor:pointer;color:red;text-decoration:underline;}          .foot{margin-top:0px;color:#666;height:48px;border:1px solid #c8c8c8;border-top:0;background-color:#eaeaea;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));position:relative;z-index:8;}         .foot div, .foot a{line-height:48px;height:48px;}         .foot .select-all{width:80px;height:48px;line-height:48px;color:#666;text-align:center;}         .foot .delete{padding-left:10px;}         .foot .closing{border-left:1px solid #c8c8c8;width:103px;text-align:center;color:#666;font-weight:bold;cursor:pointer;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));}         .foot .closing:hover{background-image:linear-gradient(RGB(226,226,226),RGB(241,241,241));color:#333;}         .foot .total{margin:0 20px;cursor:pointer;}         .foot  #priceTotal, .foot #selectedTotal{color:red;font-family:"Microsoft Yahei";font-weight:bold;}         .foot .selected{cursor:pointer;}         .foot .selected .arrow{position:relative;top:-3px;margin-left:3px;}         .foot .selected .down{position:relative;top:3px;display:none;}         .show .selected .down{display:inline;}         .show .selected .up{display:none;}         .foot .selected:hover .arrow{color:red;}         .foot .selected-view{width:938px;border:1px solid #c8c8c8;position:absolute;height:auto;background:#ffffff;z-index:9;bottom:48px;left:-1px;display:none;}         .show .selected-view{display:block;}         .foot .selected-view div{height:auto;}         .foot .selected-view .arrow{font-size:16px;line-height:100%;color:#c8c8c8;position:absolute;right:330px;bottom:-9px;}         .foot .selected-view .arrow span{color:#ffffff;position:absolute;left:0px;bottom:1px;}          #selectedViewList{padding:10px 20px 10px 20px;}         #selectedViewList div{display:inline-block;position:relative;width:100px;height:80px;border:1px solid #ccc;margin:10px;float:left;}         #selectedViewList div img{width:100px;height:80px;margin-right:10px;float:left;}         #selectedViewList div span{display:none;color:#ffffff;font-size:12px;position:absolute;top:0px;right:0px;width:60px;height:18px;line-height:18px;text-align:center;background:#000;cursor:pointer;}         #selectedViewList div:hover span{display:block;}     </style>  

<script type="text/javascript">  function getSubtotal(tr) {       var cells = tr.cells;             var price = tr.getElementsByTagName('input')[2]              var subtotal = cells[6]; //小计td             var countInput = tr.getElementsByTagName('input')[3]; //数目input             var span = tr.getElementsByTagName('span')[1]; //-号             //写入HTML             subtotal.innerHTML = (parseInt(countInput.value) * parseFloat(price.value)).toFixed(1);             //如果数目只有一个，把-号去掉             if (countInput.value == 1) {                 span.innerHTML = '';             }else{                 span.innerHTML = '-';             }         }           window.onload = function () {         if (!document.getElementsByClassName) {             document.getElementsByClassName = function (cls) {                 var ret = [];                 var els = document.getElementsByTagName('*');                 for (var i = 0, len = els.length; i < len; i++) {                      if (els[i].className.indexOf(cls + ' ') >=0 || els[i].className.indexOf(' ' + cls + ' ') >=0 || els[i].className.indexOf(' ' + cls) >=0) {                         ret.push(els[i]);                     }                 }                 return ret;             }         }          var table = document.getElementById('treeTable'); // 购物车表格         var selectInputs = document.getElementsByClassName('check'); // 所有勾选框         var checkAllInputs = document.getElementsByClassName('check-all') // 全选框         var tr = table.children[1].rows; //行         var selectedTotal = document.getElementById('selectedTotal'); //已选商品数目容器         var priceTotal = document.getElementById('priceTotal'); //总计 //         var deleteAll = document.getElementById('deleteAll'); // 删除全部按钮         var selectedViewList = document.getElementById('selectedViewList'); //浮层已选商品列表容器         var selected = document.getElementById('selected'); //已选商品         var foot = document.getElementById('foot');          // 更新总数和总价格，已选浮层         function getTotal() {             var seleted = 0;             var price = 0;             var HTMLstr = '';             for (var i = 0, len = tr.length; i < len; i++) {                 if (tr[i].getElementsByTagName('input')[0].checked) {                     tr[i].className = 'on';                     seleted += parseInt(tr[i].getElementsByTagName('input')[3].value);                     price += parseFloat(tr[i].cells[6].innerHTML);                     HTMLstr += '<div><img src="' + tr[i].getElementsByTagName('img')[0].src + '"><span class="del" index="' + i + '">取消选择</span></div>'                 }                 else {                     tr[i].className = '';                 }             }             selectedTotal.innerHTML = seleted;             priceTotal.innerHTML = price.toFixed(2);             selectedViewList.innerHTML = HTMLstr;              if (seleted == 0) {                 foot.className = 'foot';             }         }         // 计算单行价格                // 点击选择框         for(var i = 0; i < selectInputs.length; i++ ){             selectInputs[i].onclick = function () {                 if (this.className.indexOf('check-all') >= 0) { //如果是全选，则吧所有的选择框选中                     for (var j = 0; j < selectInputs.length; j++) {                         selectInputs[j].checked = this.checked;                     }                 }                 if (!this.checked) { //只要有一个未勾选，则取消全选框的选中状态                     for (var i = 0; i < checkAllInputs.length; i++) {                         checkAllInputs[i].checked = false;                     }                 }                 getTotal();//选完更新总计             }         }          // 显示已选商品弹层         selected.onclick = function () {             if (selectedTotal.innerHTML != 0) {                 foot.className = (foot.className == 'foot' ? 'foot show' : 'foot');             }         }          //已选商品弹层中的取消选择按钮         selectedViewList.onclick = function (e) {             var e = e || window.event;             var el = e.srcElement;             if (el.className=='del') {                 var input =  tr[el.getAttribute('index')].getElementsByTagName('input')[0]                 input.checked = false;                 input.onclick();             }         }          //为每行元素添加事件         for (var i = 0; i < tr.length; i++) {             //将点击事件绑定到tr元素             tr[i].onclick = function (e) {                 var e = e || window.event;                 var el = e.target || e.srcElement; //通过事件对象的target属性获取触发元素                 var cls = el.className; //触发元素的class                 var countInout = this.getElementsByTagName('input')[3]; // 数目input                 var value = parseInt(countInout.value); //数目                 //通过判断触发元素的class确定用户点击了哪个元素                 switch (cls) {                     case 'add': //点击了加号                         countInout.value = value + 1;                         getSubtotal(this);                         break;                     case 'reduce': //点击了减号                         if (value > 1) {                             countInout.value = value - 1;                             getSubtotal(this);                         }                         break; //                     case 'delete': //点击了删除 //                         var conf = confirm('确定删除此商品吗？'); //                         if (conf) { //                             this.parentNode.removeChild(this); //                         }                         break;                 }                 getTotal();             }             // 给单价输入框绑定keyup事件             tr[i].getElementsByTagName('input')[2].onkeyup = function () {                            var val = parseInt(this.value);                 if (isNaN(val) || val <= 0) {                     val = 1;                 }                 if (this.value != val) {                     this.value = val;                 }                 getSubtotal(this.parentNode.parentNode); //更新小计                 getTotal(); //更新总数             }                            // 给数量输入框绑定keyup事件             tr[i].getElementsByTagName('input')[3].onkeyup = function () {                             var val = parseInt(this.value);                 if (isNaN(val) || val <= 0) {                     val = 1;                 }                 if (this.value != val) {                     this.value = val;                 }                 getSubtotal(this.parentNode.parentNode); //更新小计                 getTotal(); //更新总数             }         }              console.log("u767eu5ea6u641cu7d22u3010u7d20u6750u5bb6u56edu3011u4e0bu8f7du66f4u591aJSu7279u6548u4ee3u7801");         // 默认全选         checkAllInputs[0].checked = true;         //不全选 //         checkAllInputs[0].checked = false;                           checkAllInputs[0].onclick();     }     </script>     

<form id="listForm" method="post">  <table   id="treeTable" class="table table-bordered table-condensed"    style="table-layout:fixed;width: 100%;height: 100%">   <thead>    <tr>            <th style="text-align: center;width: 60px;"><label>                 <input class="check-all check" type="checkbox">&nbsp;&nbsp;全选&nbsp;&nbsp;商品名称</label></th>     <th style="text-align: center;width: 60px;">出库单号</th>     <th style="text-align: center;width: 60px;">商品标识码</th>     <th style="text-align: center;width: 60px;">客户</th>     <th style="text-align: center;width: 60px;">单价(元)</th>     <th style="text-align: center;width: 60px;">数量</th>     <th style="text-align: center;width: 60px;">小计</th>     <th style="text-align: center;width: 60px;">颜色</th>     <th style="text-align: center;width: 60px;">出库时间</th>     <th style="text-align: center;width: 60px;">操作员</th>    </tr>   </thead>     <tbody>       <c:forEach items="${pageid}" var="psalesorder">    <tr>     <!--    商品分类 -->     <td style="text-align: center;">     <input class="check-one check" type="checkbox" name="checkExe" id="cbx" value="${psalesorder.id}/${psalesorder.count}/${psalesorder.testname}"><img src="" alt="" style="display: none"><span>${psalesorder.testname}</span>     </td>      <!--            商品编号 -->          <td style="text-align: center;"title="${psalesorder.address.name}">  <div style="width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">${psalesorder.address.name}</div>     </td>      <!--    商品标识码 -->                <td style="text-align: center;">                   <input name="code1" type="text" id="biaoshi" value="${psalesorder.code}" style="width:100px;margin:0;padding:0;text-align:center;">               </td>               <!--    客户 -->        <td style="text-align: center;"title="${psalesorder.companyname.name}${psalesorder.clientname.name}">                   <div style="width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">${psalesorder.companyname.name}${psalesorder.clientname.name}</div>      </td>       <!--   商品单价-->               <td style="text-align: center;">                   <shiro:hasPermission name="cms:psalesorder:edit">                   <input name="projectsexone" type="text" value="${psalesorder.projectsexone}" style="width:50px;margin:0;padding:0;text-align:center;">                   </shiro:hasPermission>                </td>                          <!--          进货数量-->               <td style="text-align: center;" class="count">                  <span class="reduce"></span>                   <shiro:hasPermission name="cms:psalesorder:edit">                   <input class="count-input" name="sorts"type="text" value="${psalesorder.count}" style="height: 15px">                   <input type="hidden" name="ids" value="${psalesorder.id}"/>      </shiro:hasPermission>              <span class="add">+</span>             </td>   <!--           小计-->               <td style="text-align: center;">                   ${psalesorder.count*psalesorder.projectsexone}              </td>          <td style="text-align: center;"title="${psalesorder.phoneone}">       <shiro:hasPermission name="cms:psalesorder:edit">       <input name="phoneone" type="text" value="${psalesorder.phoneone}" style="width:50px;margin:0;padding:0;text-align:center;">       </shiro:hasPermission>    </td>           <td style="text-align: center;">      <fmt:formatDate value="${psalesorder.createDate}" pattern="yyyy-MM-dd"/>    </td>         <td style="text-align: center;"title="${psalesorder.createBy.name}">                    <div style="width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">${psalesorder.createBy.name}</div>    </td>    </tr>   </c:forEach>   </tbody>  </table>  <div class="pagination" style="color:#999999;text-align: center; ">共   ${listcount}  条记录</div>          <div class="foot" id="foot">         <label class="fl select-all"><input type="checkbox" class="check-all check">&nbsp;&nbsp;全选</label>         <div  style="margin-top: -48px; margin-left: 100px; width: 30px"  οnclick="testdelete()">删除</div>                            <div style="margin-top: -48px;"class="fr closing" οnclick="updateSort();">保存</div>         <input type="hidden" id="cartTotalPrice">         <div style="margin-top: -48px;margin-right: 110px" class="fr total">合计：￥<span id="priceTotal">0</span></div>         <div style="margin-top: -48px;;margin-right: 240px" class="fr selected" id="selected">已选商品<span id="selectedTotal">&nbsp;&nbsp;0&nbsp;&nbsp;</span>件<span class="arrow up"></span><span class="arrow down"></span></div>         <div class="selected-view">             <div id="selectedViewList" class="clearfix"><div><img src="https://www.jq22.com/demo/jquery-guc20151105/images/1.jpg"><span class="del" index="0">取消选择</span></div><div><img src="https://www.jq22.com/demo/jquery-guc20151105/images/2.jpg"><span class="del" index="1">取消选择</span></div><div><img src="https://www.jq22.com/demo/jquery-guc20151105/images/3.jpg"><span class="del" index="2">取消选择</span></div><div><img src="https://www.jq22.com/demo/jquery-guc20151105/images/4.jpg"><span class="del" index="3">取消选择</span></div></div>             <span class="arrow">◆<span>◆</span></span> </div>     </div>        </form> 

上截图

2.