usertrace.java

来自「jsp 应用开发技术光盘 是《jsp应用开发技术》这本书的源代码」· Java 代码 · 共 28 行

package ch09;

import javax.servlet.http.*;

public class UserTrace implements javax.servlet.http.HttpSessionBindingListener {
	
	private String user_name;
	private UserList container = UserList.getInstance();
	
	public String getUserName() {
		return user_name;
	}
	
	public void setUserName(String name) {
		user_name = name;
	}

	// 当userTrace被加入session对象时会调用此方法   
	public void valueBound(HttpSessionBindingEvent event) {
	}

	// 当userTrace被移出session对象时会调用此方法   
	public void valueUnbound(HttpSessionBindingEvent event) {
		container.removeUser(user_name);
	}
}