1、为什么要使用tmpl?
浏览器端根据 JSON 生成 HTML 有个很苦恼的地方就是,结构不复杂的时候还好,结构一复杂,就想死了,需要很小心很小心地写出几乎无法维护的 JavaScript 代码。


2、tmpl具体应用的方面?
动态请求数据来更新页面是现在非常常用的方法,比如博客评论的分页动态加载,微博的滚动加载和定时请求加载、相册时光轴的加载等。这些情况下,动态请求返回的数据一般不是已拼好的 HTML 就是 JSON 或 XML,总之不在浏览器端拼数据就在服务器端拼数据。不过,从传输量方面来看,返回 HTML 不划算,而在 web 传输方面,现在更多的是使用 JSON 而不是 XML。所以说,一般在浏览器端拼数据比较不错。


3、如何使用?
首先得引入jquery.tmpl.js这个包,否则无法使用。


4、jquery tmpl中一些标签的使用
${}等同与{{=}}是输出变量 ${}里面还可以放表达式 (=和变量之间一定要有空格,否则无效)
示例1:

<div id="div_demo">
</div>
/*!注意这里的type="text/x-jquery-tmpl"*/
<script id="demo" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;">
      <span>${ID}</span>
      <span style="margin-left:10px;">{{= Name}}</span>
      <span style="margin-left:10px;">${Number(Num)+1}</span>
      <span style="margin-left:10px;">${Status}</span>
    </div>
</script>
<script type="text/javascript">
  var users = [{ ID: 'think8848', Name: 'Joseph Chan', Num: '1', Status: 1 }, { ID: 'aCloud', Name: 'Mary Cheung', Num: '2'}];
  $("#demo").tmpl(users).appendTo('#div_demo');
</script>




{{each}} 提供循环逻辑,$value访问迭代变量 也可以自定义迭代变量(i,value)


示例2:


<div id="div_each">
</div>
<script id="each" type="text/x-jquery-tmpl"> 
    <h3>users</h3>
    {{each(i,user) users}}
        <div>${i+1}:{{= user.name}}</div>
        {{if i==0}}
            <h4>group</h4>
            {{each(j,group) groups}}
                <div>${group.name}</div>
            {{/each}}
        {{/if}}
    {{/each}}
    <h3>depart</h3>
    {{each departs}}
        <div>{{= $value.name}}</div>
    {{/each}}
</script> 
<script type="text/javascript">
  var eachData = { users: [{ name: 'jerry' }, { name: 'john'}], groups: [{ name: 'mingdao' }, { name: 'meihua' }, { name: 'test'}], departs: [{ name: 'IT'}] };
  $("#each").tmpl(eachData).appendTo('#div_each');
</script>




{{if }} {{else}}提供了分支逻辑 {{else}} 相当于else if


示例3:


<div id="div_ifelse"></div>
<script id="ifelse" type="text/x-jquery-tmpl"> 
    <div style="margin-bottom:10px;"><span>${ID}</span><span style="margin-left:10px;">{{= Name}}</span>
        {{if Status}}
            <span>Status${Status}</span>
        {{else App}}
            <span>App${App}</span>
        {{else}}
            <span>None</span>
        {{/if}}
    </div>
</script> 
<script type="text/javascript">
  var users = [{ ID: 'think8848', Name: 'Joseph Chan', Status: 1, App: 0 }, { ID: 'aCloud', Name: 'Mary Cheung', App: 1 }, { ID: 'bMingdao', Name: 'Jerry Jin'}];
    $("#ifelse").tmpl(users).appendTo('#div_ifelse');
</script>



{{html}} 输出变量html,但是没有html编码,适合输出html代码


示例4:


<div id="div_html"></div>
<script id="html" type="text/x-jquery-tmpl"> 
    <div style="margin-bottom:10px;">
    <span>${ID}</span>
    <span style="margin-left:10px;">{{= Name}}</span>
      ${html}
      {{html html}}
    </div>
</script> 
<script type="text/javascript">
  var user = { ID: 'think8848', Name: 'Joseph Chan', html: '<button>html</button>' };
   $("#html").tmpl(user).appendTo('#div_html');
</script>




{{tmpl}} 嵌套模版


示例5:


<div id="tmpl"></div>
<script id="tmpl1" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;">
      <span>${ID}</span>
      <span style="margin-left:10px;">{{tmpl($data) '#tmpl2'}}</span>
    </div>     
</script>
<script id="tmpl2" type="type/x-jquery-tmpl">
    {{each Name}}${$value}  {{/each}}   
</script>
<script type="text/javascript">
  var users = [{ ID: 'think8848', Name: ['Joseph', 'Chan'] }, { ID: 'aCloud', Name: ['Mary', 'Cheung']}];
   $("#tmpl1").tmpl(users).appendTo('#tmpl');
</script>




$data $item $item代表当前的模板;$data代表当前的数据。


示例6:


<div id="div_item_data"></div>
<script id="item_data" type="text/x-jquery-tmpl"> 
     <div style="margin-bottom:10px;">
    <span>${$data.ID}</span>
    <span style="margin-left:10px;">${$item.getName(" ")}</span>
   </div>
</script> 
<script type="text/javascript">
   var users = [{ ID: 'think8848', Name: ['Joseph', 'Chan'] }, { ID: 'aCloud', Name: ['Mary', 'Cheung']}];
     $("#item_data").tmpl(users,
                {
                getName: function (spr) {
                   return this.data.Name.join(spr);
                }
                }).appendTo('#div_item_data');
</script>



 $.tmplItem()方法,使用这个方法,可以获取从render出来的元素上重新获取$item


示例7:


<script type="text/javascript">
/*!.delegate() 指定的元素(属于被选元素的子元素)添加一个或多个事件处理程序,并规定当这些事件发生时运行的函数。*/
  $('#demo').delegate('div', 'click', function () {
                var item = $.tmplItem(this);
                alert(item.data.Name);
            });
</script>




$template的使用:


示例8:


/*!$.template()方法,将一段Html编译为模板*/
var markup = '<tr><td>${ID}</td><td>${Name}</td></tr>'; 
$.template('template', markup); 
$.tmpl('template', users).appendTo('#templateRows');



5、自己代码举例


<div id = "phototimelime" class="content"></div>
  </div>
 
<script id="each" type="text/x-jquery-tmpl"> 
<ul>
    {{each(i,item) $data.list}}
    <li> <span class="point-time point-{{= i%5}}"></span>
      <time {{if item.TEST_TIME != ""}}id="{{= item.TEST_TIME}}"{{/if}} datetime="{{= item.CREATE_TIME}}">{{= item.SHOW_TIME}}</time>
    <dl>
      <dt>
    照片信息 <p class="things text-{{= i%5}}">照片名字:{{= item.NAME}}</p>
        <p class="brief"><span class="text-yellow">上传时间:</span>{{= item.CREATE_TIME}}</p>
    </dt>
    <dd><div class="photo_info">
    <a class="abc" href="http://localhost:8080/rc/album/photodetail.htm?pid={{= item.PHOTO_ID}}" class="bot">
    <img alt="示例图片_04" id="1827" src="http://localhost:8088/RCService/image?photo_id={{= item.PHOTO_ID}}" width="180px" height="180px">
    </a></div>
    </dd>
    </dl>
    </li>
    {{/each}}
</ul>
</script> 
<script type="text/javascript">
$(document).ready(function(){
  var showCount = 5;
  var currentYear = new Date().toLocaleString().substring(0,4);
  /*初始化创建相册时间监听*/
  initPhotoTimeLine(showCount,currentYear);
});


/*初始化时光轴*/
function initPhotoTimeLine(count,currentYear){  
  var url = CONST.SERVICE_URL+"/album/timeLine.do?method=getPhotoInfo&count="+count+"¤tYear="+currentYear;
  $.post(url,function(data){
    debugger;
    if(data != null&&data!='[]'&&data != ""){
      data = JSON.parse(data);
      /*设计月份*/
      var month = new Array("","一月(Jan)","二月(Feb)","三月(Mar)","四月(Apr)","五月(May)","六月(Jun)","七月(Jul)","八月(Aug)","九月(Sep)"
          ,"十月(Oct)","十一月(Nov)","十二月(Dec)");
      var month_type = new Array("","Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep"
          ,"Oct","Nov","Dec");
      var flag_month = "月份";
      $.each(data,function(k,v){
        if(v.SHOW_TIME.substring(7,5) != flag_month){
          debugger;
          flag_month = v.SHOW_TIME.substring(7,5);
          v.TEST_TIME = month_type[removeZero(v.SHOW_TIME.substring(7,5))];
          v.SHOW_TIME = month[removeZero(v.SHOW_TIME.substring(7,5))];
        }else{
          v.SHOW_TIME = "";
          v.TEST_TIME = "";
        }
          //alert(v.SHOW_TIME);
      });
      $("#phototimelime").html('');
      $("#each").tmpl({"list":data}).appendTo('#phototimelime');
    }else{
      $("#phototimelime").html('<div style="text-align:center;padding:6px;font-size:16px;color:#999;">暂无数据</div>');
      $(".right").css("display","none");
    }
    
  });
}
/*除去字符串中0的方法*/
function removeZero(str){
  return str.substring(0,1) == "0"?str.substring(1):str;
}
</script>