package No04_条件判断;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateExceptionHandler;
public class Test {
public static void main(String[] args) throws Exception {
设置模板的home目录，默认从此目录获取模板（此设置只需在应用中设置一次）
Configuration cfg = new Configuration(Configuration.VERSION_2_3_22);
cfg.setDirectoryForTemplateLoading(new File("D:/freemarker_template_home/"));
cfg.setDefaultEncoding("UTF-8");
cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
获取模板
Template temp = cfg.getTemplate("No04_条件判断.ftl");
创建、设置数据模型
Map<String, Object> dataMap = new HashMap<String, Object>();
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
dataMap.put("userList", list);
Map<String, Object> userMap = new HashMap<String, Object>();
userMap.put("username", "Nick Huang");
userMap.put("age", 20);
userMap.put("nickname", null);
list.add(userMap);
userMap = new HashMap<String, Object>();
userMap.put("username", "Viki Yang");
userMap.put("age", 19);
userMap.put("nickname", "Viki");
list.add(userMap);
userMap = new HashMap<String, Object>();
userMap.put("username", "Teng Yang");
userMap.put("age", 18);
userMap.put("nickname", "Teng");
list.add(userMap);
将模板和数据模型合并
String filename = temp.getName();
filename = filename.substring(0, filename.lastIndexOf(".") + 1) + "html";
FileOutputStream fos = new FileOutputStream(new File("D:/freemarker_output_home/" + filename));
Writer out = new OutputStreamWriter(fos);
temp.process(dataMap, out);
out.flush();
}
}
No04_条件判断.ftl
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>User list</title>
</head>
<body>
<table>
<thead>
<tr>
<th>user name</th>
<th>age</th>
<th>nick name</th>
</tr>
</thead>
<tbody>
<#list userList as being>
<tr>
<th>
<#if being.username == ‘Nick Huang‘>
Junior Programmer (${being.username})
<#else>
${being.username}
</#if>
</th>
<th>
<#if 19 < being.age >
Old
<#else>
Young
</#if>
</th>
<th>
<#-- 如果为空，取默认值 -->
<#if being.nickname??>
${being.nickname}
<#else>
no value
</#if>
<#-- 以下为简单写法 -->
<#-- ${being.nickname ! ‘no value‘} -->
</th>
</tr>
</#list>
</tbody>
</table>
</body>
</html>
时间： 2024-10-25 05:02:28