struts2获取request,session,application4种方式

第一种，依赖容器获取：

                               private Map request; private Map session; private Map application; public ActionTest() { request=(Map)ActionContext.getContext().get("request"); session=ActionContext.getContext().getSession(); application=ActionContext.getContext().getApplication(); }

 

第二种，IoC方式，是通过依赖注入方式获取到对象，需要实现相应的接口为 RequestAware,SessionAware,ApplicationAware：

                               private Map request; private Map session; private Map application; public void setRequest(Map request) { this.request = request; } public void setSession(Map session) { this.session = session; } public void setApplication(Map application) { this.application = application; }

 

第三种，获取的是原型：

                               private HttpServletRequest request; private HttpSession session; private ServletContext application; public ActionTest() { request=ServletActionContext.getRequest(); session=request.getSession(); application=session.getServletContext(); }

 

第四种，通过IoC获取原型，需要实现ServletRequestAware，并且要实现setServletRequest方法：

                               private HttpServletRequest request; private HttpSession session; private ServletContext application; public void setServletRequest(HttpServletRequest request) { this.request=request; this.session=request.getSession(); this.application=session.getServletContext(); }