Struts invalidate session

Create a struts action - LogoutAction.java

 package strutstest.actions;  
 import javax.servlet.http.HttpServletRequest;  
 import javax.servlet.http.HttpServletResponse;  
 import org.apache.struts.action.Action;  
 import org.apache.struts.action.ActionError;  
 import org.apache.struts.action.ActionErrors;  
 import org.apache.struts.action.ActionForm;  
 import org.apache.struts.action.ActionForward;  
 import org.apache.struts.action.ActionMapping;  
 /**  
  * @version 1.0  
  * @author  
  */  
 public class LogoutAction extends Action {  
      public ActionForward execute(ActionMapping mapping, ActionForm form,  
                HttpServletRequest request, HttpServletResponse response)  
                throws Exception {  
           ActionErrors errors = new ActionErrors();  
           ActionForward forward = new ActionForward(); // return value  
           try {  
                // do something here  
                request.getSession().invalidate();  
           } catch (Exception e) {  
                // Report the error using the appropriate name and ID.  
                errors.add("name", new ActionError("id"));  
           }  
           // If a message is required, save the specified key(s)  
           // into the request for use by the <struts:errors> tag.  
           if (!errors.isEmpty()) {  
                saveErrors(request, errors);  
                // Forward control to the appropriate 'failure' URI (change name as  
                // desired)  
                forward = mapping.findForward("failure");  
           } else {  
                // Forward control to the appropriate 'success' URI (change name as  
                // desired)  
                forward = mapping.findForward("success");  
           }  
           // Finish with  
           return (forward);  
      }  
 }  

Add the action to struts-config.xml

 <action path="/logout" type="strutstest.actions.LogoutAction">  
      <forward name="success" path="/logout.jsp">  
      </forward>  
      <forward name="failure" path="/error.jsp">  
      </forward>  
 </action>  

Add logout link to jsp

 <html:link target="_self" page="/logout.do">logout</html:link>