onlineuser.java

功能是公安和学校的管理系统,用struts+hibernate+spring等匡架组成,在eclepse就能编译

package com.comingnet.onLineUser;
import javax.servlet.http.*; 
import org.apache.log4j.*;          //引入日志工具包  
import org.apache.log4j.BasicConfigurator;
import  java.util.*;
import com.comingnet.bean.InserOnlineUser;

public  class OnLineUser implements HttpSessionBindingListener{  

    static Logger logger = Logger.getLogger(OnLineUser.class.getName());
   
    public  OnLineUser(){  
    }  

    private static Vector  users=new  Vector();  //静态变量!!!!!!!!!!!!
    private int i=1;
    public  int  getCount(){  
            users.trimToSize();  
            return  users.capacity();  
    }  
    public  boolean  existUser(String  userName){  
            users.trimToSize();  
            boolean  existUser=true;  
            for(int i=0;i<users.capacity();i++)  
            {  
                    if(userName.equals((String)users.get(i)))  
                    {  
                         existUser=false;  
                         //logger.info(new Date()+"用户:"+userName+"重复登录!");                 
                         break;  
                    }  
            }  
            return  existUser;  
    }  

    
    public  boolean  deleteUser(String  userName)  {  
            users.trimToSize();      
            if(!existUser(userName)){  
                    int  currUserIndex=-1;  
                    for(int  i=0;i<users.capacity();i++){  
                            if(userName.equals((String)users.get(i))){  
                                   currUserIndex=i;  
                                    break;  
                            }  
                    }  
                    if  (currUserIndex!=-1){  
                            users.remove(currUserIndex);  
                            users.trimToSize();  
                            return  true;  
                    }  
                    
            }  
            return  false;  
    }  

    public  Vector  getOnLineUser()  
    {  
            return  users;  
    }  
    
    
    
        /**
         * 继承HttpSessionBinddingListener接口的两个方法
         */
    public  void  valueBound(HttpSessionBindingEvent  e)  {  
                   users.trimToSize();  
                   users.add(e.getName());  
               
                    logger.info(new java.util.Date()+",用户:"+e.getName()+"登录本系统!");                 
                    i++;
                    for(int i = 0;i < users.size();i++){
                                   }
                  
                   logger.info(new java.util.Date()+"在线用户数为:"+getCount());   
           }
        
        public  void  valueUnbound(HttpSessionBindingEvent  e) {  
            users.trimToSize();  
            String  userName=e.getName();  
            deleteUser(userName);                    //删除session数据
            
            InserOnlineUser iou=new InserOnlineUser();            
            iou.deleteZXB(userName);                 //删除在线表中的数据
            
            logger.info(new java.util.Date()+",用户:"+userName+"退出本系统!");                 
            logger.info(new java.util.Date()+"在线用户数为:"+getCount());                 
        }  
}