Struts2_1200_AccessWebElements

取得Map类型request,session,application,真实类型 HttpServletRequest, HttpSession, ServletContext的引用:

 

LoginAction1 : 前三者：依赖于容器

LoginAction2 : 前三者：IOC (只用这种)

LoginAction3 : 后三者：依赖于容器

LoginAction4 : 后三者：IOC

 

 LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware { private Map<String, Object> request;private Map<String, Object> session;private Map<String, Object> application;//DI dependency injection//IoC inverse of controlpublic String execute() {request.put("r1", "r1");session.put("s1", "s1");application.put("a1", "a1");return SUCCESS; }@Overridepublic void setRequest(Map<String, Object> request) {this.request = request;}@Overridepublic void setSession(Map<String, Object> session) {this.session = session;}@Overridepublic void setApplication(Map<String, Object> application) {this.application = application;}}