struts2中Action访问servlet的两种方式

/**
 *  @author zx
 */
package com.zhouxiang.action;

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

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

import com.opensymphony.xwork2.ActionSupport;

/**
 * @author zx
 *
 */
public class LoginAction1 extends ActionSupport implements ServletRequestAware{
	
	private String userName;
	private String password;
	private HttpServletRequest request;
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
	public HttpServletRequest getRequest() {
		return request;
	}
	public void setRequest(HttpServletRequest request) {
		this.request = request;
	}
	@Override
	public void setServletRequest(HttpServletRequest arg0) {
		// TODO Auto-generated method stub
		this.request=arg0;
	}
	public  String validateUser()throws Exception
	{
		
		if(getUserName().endsWith("QQ")&&getPassword().equals("123"))
		{
			//调用ServletActionContext的getRequest（）方法获取request对象
			HttpServletRequest request=ServletActionContext.getRequest();
			//调用request对象的getSession（）方法获取session对象
			HttpSession session=request.getSession();
			//调用session对象的方法设置数据
			session.setAttribute("username",this.userName);
			return SUCCESS;
			
		}
		else
		{
			return INPUT;
		}
	}

}