自己写的Session监听,把sesssionId和session对象存储到Map集合中
public class SessionListener implements HttpSessionListener {
public static Map userMap = new HashMap();
private MySessionContext myc=MySessionContext.getInstance();
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
myc.AddSession(httpSessionEvent.getSession());
}
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
HttpSession session = httpSessionEvent.getSession();
myc.DelSession(session);
}
}
public class MySessionContext {
private static MySessionContext instance;
private HashMap mymap;
private MySessionContext() {
mymap = new HashMap();
}
public static MySessionContext getInstance() {
if (instance == null) {
instance = new MySessionContext();
}
return instance;
}
public synchronized void AddSession(HttpSession session) {
if (session != null) {
mymap.put(session.getId(), session);
}
}
public synchronized void DelSession(HttpSession session) {
if (session != null) {
mymap.remove(session.getId());
}
}
public synchronized HttpSession getSession(String session_id) {
if (session_id == null) return null;
return (HttpSession) mymap.get(session_id);
}
}