loginsessionlistener.java

基于J2EE的办公自动化系统。实现流程定义流程办理等。运用了hibernate+struts+spring框架综合运用的系统。

package com.oa.module.login;

import java.util.Vector;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;

import com.oa.module.office.user.Tuser;
/**
 * 监听Session
 * @author ytl
 *
 */
public class LoginSessionListener implements HttpSessionAttributeListener {
	
	public void attributeAdded(HttpSessionBindingEvent event) {// 当给session添加值的时候
		String name = event.getName();
		Object value = event.getValue();
		ServletContext context = event.getSession().getServletContext();

		if (name.equals("user")) {// 如果session 里放的是用户
			Vector online = (Vector) context.getAttribute("online");
			if (online == null) {
				online = new Vector();
				context.setAttribute("online", online);// 把集合放到context中

			}
			online.add(value);

		}
		
		

	}
	
	public void attributeRemoved(HttpSessionBindingEvent event) { // 删除
		Tuser tuser = (Tuser) event.getSession().getAttribute("user");
		LoginDAO lg = new LoginDAO();
		lg.setonline("0",tuser);
		String name = event.getName();
		Object value = event.getValue();
		ServletContext context = event.getSession().getServletContext();
		if (name.equals("user")) {// 如果session 里放的是用户
			Vector online = (Vector) context.getAttribute("online");

			if (online!=null){
				online.remove(value);
			}
		}
		
		
	}

	public void attributeReplaced(HttpSessionBindingEvent arg0) {
		// TODO 自动生成方法存根

	}

}