<html:erorrs/>不能输出

Question

1、class LogonForm extends ValidatorForm2、
    public ActionErrors validate(ActionMapping mapping,HttpServletRequest request)
    {
        ActionErrors errors = new ActionErrors();
        if((userid == null) || (userid.length() < 5))
        {
            errors.add("errors.login.null",new ActionMessage("error.userid.required"));
        }
        if((password == null) || (password.length() < 5))
        {
            errors.add("password",new ActionMessage("error.password.required"));
        }
.....