积分榜，权限用的都是自定义标签做的
拿积分榜的用法来说明
public class ScoresDirective implements TemplateDirectiveModel {
[@Override](/user/Override)
public void execute(Environment environment, Map map, TemplateModel[] templateModels,
TemplateDirectiveBody templateDirectiveBody)
throws TemplateException, IOException {
List<User> scores = new ArrayList<User>();
if(map.containsKey("limit") && map.get("limit") != null) {
scores = User.me.scores(10);
}
DefaultObjectWrapperBuilder builder = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_23);
environment.setVariable("list", builder.build().wrap(scores));
templateDirectiveBody.render(environment.getOut());
}
}
获取标签中属性的值都是从map参数里拿的
输出对象通过environment对象输出
标签名字是什么，怎么指定呢？
看看 PyTag.java 就知道了
public class PyTag extends SimpleHash {
public PyTag() {
put("hasPermission", new PermissionDirective());
put("scores", new ScoresDirective());
}
}
最后就是配置在JFinalConfig里了
FreeMarkerRender.getConfiguration().setSharedVariable("py", new PyTag());
使用方法：
<@py.scores limit=10>
<#list list as u>
<tr>
<td><a href="/user/${u.nickname!}">${u.nickname!}</a></td>
<td <#if hidden == "true">class="hidden"</#if>><a href="${u.url!}">${u.url!}</a></td>
<td <#if hidden == "true">class="hidden"</#if>>${u.description!}</td>
<td>${u.score!}</td>
</tr>
</#list>
</@py.scores>
