java中产生HttpServletRequest等作用域

protected ServletContext getServletContext() { return ServletActionContext.getServletContext();
}

protected HttpSession getSession(boolean paramBoolean) { return ServletActionContext.getRequest().getSession(paramBoolean);
}

protected HttpSession getSession() { return ServletActionContext.getRequest().getSession();
}

protected HttpServletRequest getRequest() { return ServletActionContext.getRequest();
}

protected HttpServletResponse getResponse() { return ServletActionContext.getResponse();
}
HttpServletRequest request = ServletActionContext.getRequest();