struts2获取session与request对象

非IoC方式

　　要获得上述对象，关键Struts 2.0中com.opensymphony.xwork2.ActionContext类。我们可以通过它的静态方法getContext()获取当前Action的上下文对象。 另外，org.apache.struts2.ServletActionContext作为辅助类（Helper Class），可以帮助您快捷地获得这几个对象。

 HttpServletRequest request = ServletActionContext.getRequest(); HttpServletResponse response = ServletActionContext.getResponse(); HttpSession session = request.getSession();

　　如果你只是想访问session的属性（Attribute），你也可以通过ActionContext.getContext().getSession()获取或添加session范围（Scoped）的对象。

 

IoC方式

要使用IoC方式，我们首先要告诉IoC容器（Container）想取得某个对象的意愿，通过实现相应的接口做到这点。

 

public class IoCServlet extends ActionSupport implements SessionAware, ServletRequestAware, ServletResponseAware { private String message; private Map att; private HttpServletRequest request; private HttpServletResponse response; public String getMessage() { return message; } publicvoid setSession(Map att) { this.att = att; } publicvoid setServletRequest(HttpServletRequest request) { this.request = request; } publicvoid setServletResponse(HttpServletResponse response) { this.response = response; } @Override public String execute() { att.put("msg", "Hello World from Session!"); HttpSession session = request.getSession(); StringBuffer sb =new StringBuffer("Message from request: "); sb.append(request.getParameter("msg")); sb.append("<br>Response Buffer Size: "); sb.append(response.getBufferSize()); sb.append("<br>Session ID: "); sb.append(session.getId()); message = sb.toString(); return SUCCESS; }}