STRUTS2 Study Note VI: STRUTS2 's action to access Servletapi several ways

Method One: Access Serlvetapi through Actioncontext, this way there is no intrusive action class part of the code

ImportCom.opensymphony.xwork2.ActionContext;  PublicString Execute ()throwsException {if("admin". Equals (User.getusername ()) && "Admin". Equals (User.getpassword ())) {            //Request for a map method//Actioncontext.getcontext (). Put ("msg", "Login Successful"); //get the session of Map mode//Actioncontext.getcontext (). GetSession (). Put ("msg", "Login Successful"); //get the application of Map modeActioncontext.getcontext (). Getapplication (). Put ("msg", "Login succeeded"); return"Success"; }                return"Error"; }

Method Two: Through Servletactioncontext access to SERLVETAPI, this way is not intrusive, it is recommended to use this way the action class part of the code

ImportOrg.apache.struts2.ServletActionContext;  PublicString Execute ()throwsException {if("admin". Equals (User.getusername ()) && "Admin". Equals (User.getpassword ())) {servletactioncontext.getrequest (). SetAttribute ("MSG", "Login Successful");            Servletactioncontext.getresponse (); Servletactioncontext.getpagecontext (). SetAttribute ("MSG", "Login Successful"); Servletactioncontext.getrequest (). GetSession (). SetAttribute ("MSG", "Login Successful"); return"Success"; }                return"Error"; }

Method Three: Implement the Assembly Interface, implementation method (Servletrequestaware,servletresponseaware) Action class

 Packagecom.djoker.struts2;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;ImportOrg.apache.struts2.interceptor.ServletRequestAware;ImportOrg.apache.struts2.interceptor.ServletResponseAware; Public classLoginactionImplementsservletrequestaware,servletresponseaware{Privateuser User;  PublicUser GetUser () {returnuser; }     Public voidsetUser (user user) { This. user =user; }    PrivateHttpServletRequest request; Privatehttpservletresponse response;  PublicString Execute ()throwsException {if("admin". Equals (User.getusername ()) && "Admin". Equals (User.getpassword ())) {             This. Request.setattribute ("msg", "Login Successful"); return"Success"; }                return"Error"; } @Override Public voidSetservletresponse (httpservletresponse response) { This. Response =response; } @Override Public voidsetservletrequest (HttpServletRequest request) { This. Request =request; }    }

STRUTS2 Study Note VI: STRUTS2 's action to access Servletapi several ways