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JAVA中如何使用freemaker模版进行输出

2013-02-07 10:42 501 查看
首先你要有一个定义好的ftl文件,也就是最终输出的样式定义

<html>
<head>
<title></title>
</head>
<style type="text/css">

table {
width: 800px;
height: 400px;
border: 2px solid black;
}

table thead tr td{
text-align: center;
border-right: 1px solid #C1DAD7;
border-bottom: 1px solid #C1DAD7;
background: #fff;
font-size: 20px;
font-weight: bold;
color: #4f6b72;
}

.td1 {
border-right: 1px solid #C1DAD7;
border-bottom: 1px solid #C1DAD7;
background: #fff;
font-size: 14px;
padding: 6px 6px 6px 12px;
color: #4f6b72;
width: 100px;
}

.td2 {
border-right: 1px solid #C1DAD7;
border-bottom: 1px solid #C1DAD7;
background: #fff;
font-size: 14px;
padding: 6px 6px 6px 12px;
color: #4f6b72;
width: 500px;
}

</style>
<body>
<center>
<table>
<thead>
<tr>
<td colspan='2'>AlertMail</td>
</tr>
</thead>
<tr>
<td class="td1">Mon_type</td>
<td class="td2">${AM.monType}</td>
</tr>
<tr>
<td class="td1">Alert_code</td>
<td class="td2">${AM.alertCode}</td>
</tr>
<tr>
<td class="td1">Alert_text</td>
<td class="td2">${AM.alertText}</td>
</tr>
<tr>
<td class="td1">Mon_date</td>
<td class="td2">${AM.monDate}</td>
</tr>
</table>
</center>
</body>
<html>
然后写一个加载ftl文件的JAVA类

import java.io.StringWriter;
import java.util.Map;

import com.service.impl.MonServiceImpl;

import freemarker.template.Configuration;
import freemarker.template.Template;

/*
* use freemarker to send email
*/
public class FreemarkUtil {

private static Configuration cfg;

private static void initialConfig() {
cfg = new Configuration();
cfg.setClassForTemplateLoading(MonServiceImpl.class,
"/package的名字,用'/'隔开/");
}
/*
* templateName means the ftl file name
* param means the Object used in ftl
*/
public static String getMail(String templateName,
Map<String, Object> param) {
String result = null;
try {
if (cfg == null) {
initialConfig();
}
Template temp = cfg.getTemplate(templateName);
StringWriter writer = new StringWriter();
temp.process(param, writer);
result = writer.toString();
writer.flush();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}
然后在需要网ftl中输出内容的地方

paramMap.put("AM", a);  AM即FTL中的对象名,要一致
String mailContent = FreemarkUtil.getMail("FTL文件的名字.ftl",
paramMap);
mail.setContent(mailContent);
通过以上语句就可以是实现了。
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