package cn.pdsu.edu;
import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

/**
* 通过ActionContext获得Map类型的request,session,application
*/
public class ActionDemo1 extends ActionSupport {
       private Map<String,Object> request;
       private Map<String,Object> session;
       private Map<String,Object> application;

       public ActionDemo1() {
             this.request = (Map)ActionContext.getContext().get("request");
             this.session = ActionContext.getContext().getSession();
             this.application = ActionContext.getContext().getApplication();
       }

       @Override
       public String execute() throws Exception {
             request.put("message", "message");
             session.put("message", "message");
             application.put("message", "message");
             return SUCCESS;
       }
}

package cn.pdsu.edu;
import java.util.Map;

import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

/**
* 通过xxxAware接口来获得Map类型的request,session,application
*/
public class ActionDemo2 extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{
       private Map<String,Object> request;
       private Map<String,Object> session;
       private Map<String,Object> application;

       @Override
       public String execute() throws Exception {
             request.put("message", "message");
             session.put("message", "message");
             application.put("message", "message");
             return SUCCESS;
       }

       public void setRequest(Map<String, Object> request) {
             this.request=request;
       }

       public void setSession(Map<String, Object> session) {
             this.session=session;
       }

       public void setApplication(Map<String, Object> application) {
             this.application = application;
       }
}

package cn.pdsu.edu;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class ActionDemo3 extends ActionSupport {
       private HttpServletRequest request;
       private HttpSession session;
       private ServletContext application;

       public ActionDemo3() {
             request = ServletActionContext.getRequest();
             session = request.getSession();
             application = session.getServletContext();
       }

       @Override
       public String execute() throws Exception {
             request.setAttribute("message", "message");
             session.setAttribute("message", "message");
             application.setAttribute("message", "message");
             return SUCCESS;
       }
}