Struts 2 中对 request、response、session的获取

下面是网络流行的两种方式，推荐使用IOC这种。
 
package com.alpha.test;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;

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

public class BaseAction extends ActionSupport implements SessionAware,
    ServletRequestAware, ServletResponseAware {

  private static final long serialVersionUID = 1L;

  // not IOC
  ActionContext context = ActionContext.getContext();
  HttpServletRequest request = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);
  HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);
  @SuppressWarnings("unchecked")
  Map session = context.getSession();
  //Map session = (Map) context.get(ActionContext.SESSION);    
  
  // IOC 
  @SuppressWarnings("unchecked")
  public void setSession(Map session) {
    this.session = session;
  }

  public void setServletRequest(HttpServletRequest request) {
    this.request = request;
  }

  public void setServletResponse(HttpServletResponse response) {
    this.response = response;
  }
}