Struts中取得Request和Response、Session的方法

（一）

        public  HttpServletRequest request = ServletActionContext.getRequest();
	public HttpServletResponse response = ServletActionContext.getResponse();
	public HttpSession session= request.getSession();
	public ServletContext application =session.getServletContext();

（二）

	private Map request;
	private Map session;
	private Map application;

	public String login() {
		request = (Map) ActionContext.getContext().get("request");
		session = ActionContext.getContext().getSession();
		application =ActionContext.getContext().getApplication();

		request.put("name", "admin");
		session.put("name", "admin");
		application.put("name", "admin");

		return SUCCESS;
	}

（三）

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

	private Map<String, Object> request;
	private Map<String, Object> session;
	private Map<String, Object> application;

	public String login() {

		request.put("name", "admin");
		session.put("name", "admin");
		application.put("name", "admin");

		return SUCCESS;
	}

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

	}

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

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

}

（四）

public class LoginAction extends ActionSupport implements ServletRequestAware{

	private HttpServletRequest request;
	private HttpSession session;
	private ServletContext application;

	public String login() {

		request.setAttribute("name", "admin");
		session.setAttribute("name", "admin");
		application.setAttribute("name", "admin");

		return SUCCESS;
	}

	@Override
	public void setServletRequest(HttpServletRequest request) {
		this.request = request;
		this.session = request.getSession();
		this.application = session.getServletContext();

	}

}