struts2 获取 request session application的方法

1.方法一：直接获取 Map类型

Map request = (Map)ActionContext.getContext().get("request");

Map session = (Map)ActionContext.getContext().getSession();

Map application =(Map) ActionContext.getContext().getApplication();

设置值后 ：request.put("name",name);

可以在Jsp页面获取 说明：为struts2的标签。

2。方法二：实现接口 依赖struts2注入 Map 类型

public class LoginAction extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{

     private Map request;

     private Map session;

     private Map application;

     @override

      public void setRequest(Map request){

            this.request=request;

     } 

     @override

      public void setSession(Map session){

            this.session=session;

     } 

     @override

      public void setApplication(Map application){

            this.application=application;

     } 

}

3.方法三：获取httpServlet类型的  (不常用)

private HttpServletRequest request = ServletActionContext.getRequest();

private HttpSession session = request.getSession();

private ServletContext application = session.getServletContext();

使用request ：request.setAttribute("name",name);

4.方法四：获取httpServlet类型的 实现ServletRequestAware 接口 (不常用)

public class LoginAction extends ActionSupport implements ServletRequestAware{

     private HttpServletRequest request ;

     private HttpSession session ;

     private ServletContext application ;

     public void setServletRequest(HttpServletRequest ruequst){

          this.request = request;

          this.session = request.getSession();

          this.application = session.getServletContext();

     }

}

文章转自:http://hi.baidu.com/snbrskt/item/6b2865e7ef61fba1c10d7505