JFinal2.1中尝试对Model进行增强，发现拦截器执行了两次

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@JFinal 你好，想跟你请教个问题：

在JFinal2.1中尝试对Model(User)进行增强，发现拦截器（ModelInterceptor.java）执行了两次，能否分析下是什么原因。

User.java

/**
 * Generated by JFinal.
 */
@SuppressWarnings("serial")
public class User extends BaseUser<User> {

	//public static final User dao = new User();
	public static final User dao = Enhancer.enhance(User.class, ModelInterceptor.class);
	public Page<User> paginate(int pageNumber, int pageSize) {
		return paginate(pageNumber, pageSize, "select *", "from pt_user order by ids asc");
	}
}

@Before(UserValidator.class)
	public void getUserListpaginate() {

		renderJson("result", User.dao.paginate(getParaToInt("pageNumber"), getParaToInt("pageSize")));	
	}

ModelInterceptor.java

public class ModelInterceptor implements Interceptor {
		
	@Override
	public void intercept(Invocation invoc) {
	
		invoc.invoke();
		
		System.out.println("dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd");
		
	}
	
	
}

执行结果

dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd


JFinal action report -------- 2016-01-07 17:57:18 ------------------------------
Controller  : com.platform.mvc.user.UserController.(UserController.java:1)
Method      : getUserListpaginate
Interceptor : com.platform.config.run.GlobalInterceptor.(GlobalInterceptor.java:1)
              com.jfinal.plugin.activerecord.tx.TxByMethods.(TxByMethods.java:1)
              com.jfinal.plugin.activerecord.tx.TxByMethodRegex.(TxByMethodRegex.java:1)
              com.platform.mvc.user.UserValidator.(UserValidator.java:1)
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