code067.java

package pack02;

import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;

//UserInfoTrace�࣬׷����
public class code067 implements HttpSessionBindingListener
{
    private String user;
    private code066 container = code066.getInstance();

    public code067()
    {
        this.user = "";
    }

    public void setUser(String user)
    {
        this.user = user;
    }

    public String getUser()
    {
        return this.user;
    }

    public void valueBound(HttpSessionBindingEvent e)
    {
        System.out.println(this.user + "������");
    }

    public void valueUnbound(HttpSessionBindingEvent e)
    {
        System.out.println(this.user + "������");
        if (user != "")
        {
            container.removeUserInfo(user); //�Ƴ��û�
        }
    }
}


/*
 *����UserInfoTrace�࣬��Ҫʵ��valueBound��valueUnbound����������
 *���ж������sessionʱ��valueBound�����Զ�ִ�У�
 *���ж����session�Ƴ�ʱ�� valueUnbound�����Զ�ִ�У�
 * 
 * HttpSessionBindingListener�ӿڣ���Ψһ����Ҫ��web.xml�����õ�
 */