countlistener.java

刚学JAVA不到一个月

package count;

import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;



public class CountListener implements HttpSessionListener {

    private static int onlineCount = 0;

  
    private CountServiceImpl countService;

   
    public final void sessionCreated(final HttpSessionEvent arg0) {
        init();
        countService.getCount(true);
        onlineCount++;
        Count count=countService.getCount(false);
        count.setOnlineCount(onlineCount);
        count.setTempCount(count.getTempCount()+1);
    }

    
    public final void sessionDestroyed(final HttpSessionEvent arg0) {
        if (onlineCount > 0) {
            onlineCount--;
            countService.getCount(false).setOnlineCount(onlineCount);
        }
    }

  
    public static int getOnlineCount() {
        return onlineCount;
    }

    private void init() {
        if (countService == null) {
            countService =CountServiceImpl.getInstance();
        }
    }
}