jfinal自定义freemarker标签

1    1. config修改freemarkerrender
2    public void afterJFinalStart() {
3        super.afterJFinalStart();
4        FreeMarkerRender.getConfiguration().setSharedVariable("bitch",new LabelDirective());
5    }
6    
7    2.添加对应的标签方法实现
8    public class LabelDirective implements TemplateDirectiveModel {
9        public void execute(Environment environment, Map map, TemplateModel[] templateModels, TemplateDirectiveBody templateDirectiveBody) throws TemplateException, IOException {
10        // 真正开始处理输出内容
11        List<User> users = new ArrayList<User>();
12        users.add(new User(11, "a", "AAA"));
13        users.add(new User(22, "b", "BBB"));
14        users.add(new User(33, "c", "CCC"));
15        environment.setVariable("users", ObjectWrapper.DEFAULT_WRAPPER.wrap(users));
16        templateDirectiveBody.render(environment.getOut());
17        }
18    }
19    
20    3.页面调用
21    <@bitch name="bitch">
22        <#list users as user>
23             <option value="${user.username}">${user.username}</option>
24        </#list>
25    </@bitch>
26
27

问题

使用<@bitch> </@bitch>标签时候 ==templateDirectiveBody== 空指针.

<></> 标签之间要有内容