使用后台开发语言的都很了解语言的动态性给开发带来的好处,PHP,aspx,jsp页面都可以直接使用相应的语法和变量,输出的事就交给解释器或编译器了,用起来方便快捷,但需要额外的解释工作;
例如php模板,需要php解析后,再由apache输出;aspx需要专用dll解析后,由IIS输出;jsp需要虚拟机解析后,由tomcat输出;
总之,就是web服务器无法接识别并输出这些动态语言的文件格式,但对html都直接识别输出给浏览器,如果直接用html来做网页内容的展示,就少了一层解析工作,从客户端发起请求,到网页输出,不可置疑html一定是最快的,这就是为什么大并发网站都会将动态内容静态化的一个重要原因;
html有打开效率高的先天优势,但也有一个先天缺陷-不支持动态语言,这也是html模板语言出现的原因,让网站即享受html高效,又享受内容的动态化;
看一看这个代金券列表的html
- <!doctype html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>代金券列表</title>
- <meta name="keywords" content="美容,美发">
- <meta name="description" content="国内专业的美容、美发用品一站式购物平台">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
- <meta name="apple-mobile-web-app-capable" content="yes">
- <meta name="apple-mobile-web-app-status-bar-style" content="black">
- <meta name="format-detection" content="telephone=no">
- <link rel="stylesheet" type="text/css" href="../css/reset.css">
- <link rel="stylesheet" type="text/css" href="../css/font-awesome.min.css">
- <link rel="stylesheet" type="text/css" href="../css/main.css">
- <link rel="stylesheet" type="text/css" href="../css/child.css">
- <link rel="stylesheet" type="text/css" href="../css/voucher_list.css">
- </head>
- <body id="home-320">
- <header id="header"></header>
- <div class="content">
- <div class="product-cnt">
- <div id="product_list"></div>
- <div class="pagination mt10" id="page">
- <a href="javascript:void(0);" class="pre-page disabled">上一页</a>
- <select name="page_list" style="padding: 7px 4px; vertical-align: top;"></select>
- <a href="javascript:void(0);" class="next-page ">下一页</a>
- </div>
- </div>
- </div>
- <div class="footer" id="footer"></div>
- <input type="hidden" name="page" value="5">
- <input type="hidden" name="curpage" value="1">
- <input type="hidden" name="hasmore">
- </body>
- <script type="text/html" id="home_body">
- <div style="text-align: center; margin-bottom: 10px;">您当前可用积分<%=member_points%></div>
- <% if( recommend_voucher ) { %>
- <ul class="ncp-voucher-list">
- <% for(var i = 0;i<recommend_voucher.length;i++) { %>
- <li>
- <div class="ncp-voucher">
- <div class="cut"></div>
- <div class="info">
- <a href="#" class="store"><%=recommend_voucher[i].voucher_t_storename%></a>
- <p class="store-classify"></p>
- <div class="pic"><img src="<%=recommend_voucher[i].voucher_t_customimg%>" /></div>
- </div>
- <dl class="value">
- <dt>¥<em><%=recommend_voucher[i].voucher_t_price%></em></dt>
- <dd>购物满<%=recommend_voucher[i].voucher_t_limit%>元可用</dd>
- <dd class="time">有效期至<%=recommend_voucher[i].voucher_t_end_date%></dd>
- </dl>
- <div class="point">
- <% if(recommend_voucher[i].voucher_t_points != 0) { %>
- <p class="required">需<em><%=recommend_voucher[i].voucher_t_points%></em>积分</p>
- <% } else { %>
- <p class="required"><em>免费领取</em></p>
- <% } %>
- <p><em><%=recommend_voucher[i].voucher_t_giveout%></em>人已领取</p>
- </div>
- <div class="button"><a target="_blank" href="javascript:void(0);" nc_type="exchangebtn" data-param='<%=recommend_voucher[i].voucher_t_id;%>' data-store='<%=recommend_voucher[i].voucher_t_store_id;%>' class="ncp-btn ncp-btn-red">立即领取</a></div>
- </div>
- </li>
- <% } %>
- </ul>
- <% } else { %>
- <div class="no-record">
- 暂无记录
- </div>
- <% if(store_id) {%>
- <a class="more" href="voucher_list.html">去其他店铺看看</a>
- <% } %>
- <% } %>
- </script>
- <script type="text/javascript" src="../js/config.js"></script>
- <script type="text/javascript" src="../js/zepto.min.js"></script>
- <script type="text/javascript" src="../js/touch.js"></script>
- <script type="text/javascript" src="../js/template.js"></script>
- <script type="text/javascript" src="../js/common.js"></script>
- <script type="text/javascript" src="../js/tmpl/common-top.js"></script>
- <script type="text/javascript" src="../js/tmpl/footer.js"></script>
- <script src="../js/simple-plugin.js" type="text/javascript"></script>
- <script type="text/javascript" src="../js/voucher_list.js"></script>
- <script type="text/javascript" src="../js/tmpl/footer.js"></script>
- </html>
模板内容<script type="text/html" id="home_body"></script>内,通过以下js来将ajax接收到的数据动态展示出来
- $.ajax({
- url:ApiUrl+"/index.php?act=voucher&curpage="+curpage+"&page="+page,
- type:'get',
- data:{key:key,store_id:store_id},
- dataType:'json',
- success:function(result){
- var html = template.render('home_body', result.datas);
- $("input[name=hasmore]").val(result.hasmore);
- $("#product_list").empty();
- $("#product_list").append(html);
- $(window).scrollTop(0);
- if(curpage>1){
- $('.pre-page').removeClass('disabled');
- }else{
- $('.pre-page').addClass('disabled');
- }
- if(curpage<result.page_total){
- $('.next-page').removeClass('disabled');
- }else{
- $('.next-page').addClass('disabled');
- }
- $("input[name=curpage]").val(curpage);
- }
- });
以上的代码这两行是关键
把json数据传给模板函数,得到html字符串
var html = template.render('home_body', result.datas);
将html字符串写入html展示区
$("#product_list").append(html);
模板渲染的过程:js->ajax->后台->json->模板->html
这样即可以html的效率和动态都可以享用了;