feat: finish bilingual session auth learning lab

web/WEB-INF/classes/com/demo/action/LogoutAction.java

@@ -0,0 +1,26 @@
+package com.demo.action;
+
+import com.opensymphony.xwork2.ActionSupport;
+import org.apache.struts2.interceptor.SessionAware;
+
+import java.util.Map;
+
+public class LogoutAction extends ActionSupport implements SessionAware {
+
+    private Map<String, Object> session;
+
+    @Override
+    public String execute() {
+        if (session != null) {
+            session.remove(LoginAction.SESSION_USER);
+            session.remove(LoginAction.SESSION_ROLE);
+            session.remove(LoginAction.SESSION_LOGIN_TIME);
+        }
+        return SUCCESS;
+    }
+
+    @Override
+    public void setSession(Map<String, Object> session) {
+        this.session = session;
+    }
+}