如果只是在内置对象中得到值可用

ActionContext ac=ActionContext.getContext();
    ac.getApplication().put("app", "人好");//application
    ac.getSession().put("com", "abcdef");//session
    ac.put("aev", "dddfs");//request

要得到原始的内置对象
HttpServletRequest request=ServletActionContext.getRequest();
HttpServletResponse response=ServletActionContext.getResponse();
ServletContext servletContext=ServletActionContext.getServletContext();