JFinal页面跳转问题?报错

@JFinal 我写了一个 Validator，路径为com/cloud/jailer/util/jfinal/LoginValidator,代码如下：

public class LoginValidator extends Validator { protected void validate(Controller c) { validateRequiredString("user.username", "nameMsg", "请输入用户名"); validateRequiredString("user.password", "passMsg", "请输入密码"); }

protected void handleError(Controller c) {
    c.keepPara("user.username");
    c.render("/jailer/login.html");
}

}