golang template使用

<html>
<head>
    <title>邮件标题</title>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
    <meta name="description" content="alert results." />
    <style type="text/css">
        body
        {
            margin: 10px 20px;
            font-size: 14px;
            font-family: "Arial","Microsoft YaHei","黑体","宋体",sans-serif;
        }
        /*table*/
        /*{*/
        /*border-collapse: collapse;*/
        /*text-align: center;*/
        /*font-size: 14px;*/
        /*}*/
        /*table td, table th*/
        /*{*/
        /*border: 2px solid #cc6f4a;*/
        /*color: #666;*/
        /*height: 20px;*/
        /*text-align: center;*/
        /*padding: 3px 3px;*/
        /*}*/
        /*table thead th*/
        /*{*/
        /**/
        /*width: 100px;*/
        /*}*/
        /*table tr:nth-child(odd)*/
        /*{*/
        /*background: #fff;*/
        /*}*/
        /*table tr:nth-child(even)*/
        /*{*/
        /*background: #c9dafa;*/
        /*}*/
        .successBtn {
            width: 60px;
            padding:3px;
            background-color: #58ab48;
            border-color: #58ab48;
            color: #fff;
            -moz-border-radius: 10px;
            -webkit-border-radius: 10px;
            border-radius: 10px; /* future proofing */
            -khtml-border-radius: 10px; /* for old Konqueror browsers */
            text-align: center;
            vertical-align: middle;
            border: 1px solid transparent;
            font-weight: 500;
            /*font-size:125%*/
        }
        .failBtn{
            width: 60px;
            padding:3px;
            background-color: #ab2e2d;
            border-color: #ab2e2d;
            color: #fff;
            -moz-border-radius: 10px;
            -webkit-border-radius: 10px;
            border-radius: 10px; /* future proofing */
            -khtml-border-radius: 10px; /* for old Konqueror browsers */
            text-align: center;
            vertical-align: middle;
            border: 1px solid transparent;
            font-weight: 500;
            /*font-size:125%*/
        }
    </style>
    <style>
        /* Border styles */
        .tabNoBorder thead, .tabNoBorder tr {
            border-top-width: 1px;
            border-top-style: solid;
            border-top-color: rgb(211, 202, 221);
        }
        .tabNoBorder {
            border-bottom-width: 1px;
            border-bottom-style: solid;
            border-bottom-color: rgb(211, 202, 221);
        }

        /* Padding and font style */
        .tabNoBorder td, .tabNoBorder th {
            padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);
        }

        /* Alternating background colors */
        .tabNoBorder tr:nth-child(even) {
            background: rgb(223, 216, 232)
        }
        .tabNoBorder tr:nth-child(odd) {
            /*background: #FFF*/
            background: rgb(223, 216, 232)
        }
    </style>

</head>
<body>
<h2>Summary</h2>
<span>预警任务《{{.TaskName}}》警告。 。详情如下：</span>
<h2>Detail</h2>
<table class="tabNoBorder" style="border-top-width:1px;
            border-top-color: rgb(211, 202, 221);">
    <tr class="columnHeadings" style="border-top-width:1px;
            border-top-style: solid;
            border-top-color: rgb(211, 202, 221);background: rgb(223, 216, 232)">
        <th style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">详细数据</th>
        <th style="padding: 5px 10px;
        font-size: 14px;
        font-family: Verdana;
        color: rgb(95, 74, 121);">对比实际值</th>
        <th style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">阈值</th>
        <th style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">对比结果</th>
    </tr>
    {{ range $Item := .Data }}
        {{ range $i,$Item1 := $Item }}
            {{if eq $i 0}}
            <tr style="border-top-width:1px;
            border-top-style: solid;
            border-top-color: rgb(211, 202, 221);background: rgb(223, 216, 232)">
                <td rowspan="{{len $Item}}" style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">

                </td>
                <td style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">{{$Item1.realValue}}</td>
                <td style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">{{$Item1.threshold}}</td>
                <td rowspan="{{len $Item}}" style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);"><div class="failBtn">Alert</div></td>
            </tr>
                {{else}}
                <tr style="border-top-width:1px;
            border-top-style: solid;
            border-top-color: rgb(211, 202, 221);background: rgb(223, 216, 232)">
                    <td style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">{{$Item1.realValue}}</td>
                    <td style="padding: 5px 10px;
            font-size: 14px;
            font-family: Verdana;
            color: rgb(95, 74, 121);">{{$Item1.threshold}}</td>
                </tr>
                {{end}}
        {{end}}
    {{end}}

</table>



<br/><br/>



</body>
</html>
var builtins = FuncMap{
"and": and,
"call": call,
"html": HTMLEscaper,
"index": index,
"js": JSEscaper,
"len": length,
"not": not,
"or": or,
"print": fmt.Sprint,
"printf": fmt.Sprintf,
"println": fmt.Sprintln,
"urlquery": URLQueryEscaper,

// Comparisons
"eq": eq, // ==
"ge": ge, // >=
"gt": gt, // >
"le": le, // <=
"lt": lt, // <
"ne": ne, // !=
}
template内置函数，使用方法为ps: {{printf "%d" var1}}