实现浏览器直接的session共享问题

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public class MySessionContext {

private static HashMap mymap = new HashMap();

     public static synchronized void AddSession(HttpSession session) {
         if (session != null) {
             mymap.put(session.getId(), session);
         }
     }

     public static synchronized void DelSession(HttpSession session) {
         if (session != null) {
             mymap.remove(session.getId());
         }
     }

     public static synchronized HttpSession getSession(String session_id) {
         if (session_id == null)
         return null;
         return (HttpSession) mymap.get(session_id);
     }

}

第二步：

public class MySessionListener implements HttpSessionListener {

public void sessionCreated(HttpSessionEvent httpSessionEvent) {
MySessionContext.AddSession(httpSessionEvent.getSession());
}

      public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
          HttpSession session = httpSessionEvent.getSession();
          MySessionContext.DelSession(session);
      }

}

第三步：

<listener>
<listener-class>com.tr.MySessionListener</listener-class>
</listener>