实现浏览器直接的session共享问题

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>