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java统计访问量代码 javaweb统计在线人数和访问量

网站访问量统计java代码怎样写？

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%-- 记录网站访问次数 --%

%

Integer counter = (Integer)application.getAttribute("counter"); //先从application里面获取计数器的key的值

if(counter==null){

//如果该值为null，说明第一次吵胡访问

application.setAttribute("counter",1);

counter=(Integer)application.getAttribute("counter");

}else {

//如果该值不为空，取出来进行累加

int i = counter.intValue();

i++;

application.setAttribute("counter",i);//累加后再放进去

}

%

% User user =(User)session.getAttribute("users"); %

%="欢迎"+user.getName() % |您是第%=counter.intValue()%位访客谨碰神

祥亏/DIV

谢谢~

高手请进！！java统计网站的访问量和在线人数的问题，有知道的直接发一个简单的例子我，多谢啦！

首先给你讲一下，我的理解，人数统计好说，因为，可已设置监听器，让其在罩扰服务器启动的时候进行监听，然后统计登录人数，但是统计在线人数，就麻烦点了，因为大多数人都不愿意点击注销按钮，直接关闭浏览器，这样session的关闭就麻烦了点，我先给出统计人数的代码，我想统计在线人数可以定时调用程序来统计，但是不是实时的，物嫌旦所以最大的障碍就是怎么在关闭浏览器的时候，就关者兆闭session

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Scanner;

import javax.servlet.ServletContext;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

public class ApplicationListener implements ServletContextListener{

public void contextDestroyed(ServletContextEvent arg0) {

ServletContext sc = arg0.getServletContext();

Integer count = (Integer) sc.getAttribute("AccessCount");

try {

PrintWriter out = new PrintWriter(new FileWriter("c:/Users/god/count.txt"));// 将人数保存到文本文件

System.out.println("count:"+count);

out.print(count);

out.flush();

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

public void contextInitialized(ServletContextEvent arg0) {

Integer count = 0;

ServletContext sc = arg0.getServletContext();

try {

Scanner in = new Scanner(new FileReader("c:/Users/god/count.txt"));// 读取已经产生的人数信息，然后进行累加

count = in.nextInt();

in.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

}

sc.setAttribute("AccessCount", count);

}

}

在web.xml文件里面进行设置

listener

listener-class

文件的位置也就是包名.ApplicationListener

/listener-class

/listener

统计的时候是设置拦截器，需要在struts.xml中设置

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionInvocation;

import com.opensymphony.xwork2.interceptor.Interceptor;

@SuppressWarnings("serial")

public class AccessInterceptor implements Interceptor{

private String id;

public void destroy() {

}

public void init() {

}

@SuppressWarnings("unchecked")

public String intercept(ActionInvocation ai) throws Exception {

ServletContext sc = ServletActionContext.getServletContext();

HttpServletRequest request = ServletActionContext.getRequest();

HttpSession session = request.getSession();

if(!session.getId().equals(id)){

Integer count = (Integer) sc.getAttribute("AccessCount");// 判断如果登录成功，统计数字自增

sc.setAttribute("AccessCount", count+1);

id = session.getId();

}

String result = ai.invoke();

return result;

}

}

java如何统计网站访问量？

步骤一、建一个举游表，表名任意，这里取名为：visitorcounter，表的结构如下所示：

+-------+------------------+------+-----+------------+----------------+

| Field | Type | Null | Key | Default | Extra |

+-------+------------------+------+-----+------------+----------------+

| id | int(11) unsigned | NO | PRI | NULL | auto_increment |

| vdate | date | NO | | 2000-01-01 | |

| vnum | int(11) | NO | | 0 | |

+-------+------------------+------+-----+------------+----------------+

步骤二、建立一个java类，名字也为：visitorcounter，类的内容如下睁敬：

package com.hdzx.pub;

import java.sql.ResultSet;

import java.text.SimpleDateFormat;

import java.util.Date;

public class VisitorCounter {

private final static String TABLE_NAME = "visitorcounter";

private static String today = null;

private static long today_num = 0;

private static long total_num = 0;

//加载访问量

public static void loadNum(){

if(total_num1)

loadTotalNum();

if(today_num悉答慎1)

loadToadyNum();

}

//加载今日访问量

private static void loadToadyNum() {

// TODO Auto-generated method stub

DBConnect db = null;

ResultSet rs = null;

if(today==null)

today = getTodayDate();

String sql = "select vnum from "+TABLE_NAME+" where vdate='"+today+"'";

try {

db = new DBConnect();

rs = db.executeQuery(sql);

if(rs.next()){

today_num = rs.getLong("vnum");

}

else

{

sql = "insert into "+TABLE_NAME+"(vdate,vnum) values('"+today+"',0)";

db.executeUpdate(sql);

today_num = 0;

}

} catch (Exception e) {

// TODO: handle exception

today_num = 0;

System.out.println("com.hdzx.pub~VisitorCounter.incTotalCounter:获得访问人数");

}

}

//加载总访问量

private static void loadTotalNum() {

// TODO Auto-generated method stub

// TODO Auto-generated method stub

DBConnect db = null;

ResultSet rs = null;

if(today==null)

today = getTodayDate();

String sql = "select vnum from "+TABLE_NAME+" where id=1";

try {

db = new DBConnect();

rs = db.executeQuery(sql);

if(rs.next()){

total_num = rs.getLong("vnum");

}

else

{

total_num = 0;

}

} catch (Exception e) {

// TODO: handle exception

total_num = 0;

System.out.println("com.hdzx.pub~VisitorCounter.incTotalCounter:获得访问人数");

}

}

//增加总的访问量

private static int incTotalCounter(){

int k = 0;

DBConnect db = null;

loadNum();

total_num = total_num+1;

String sql = "update "+TABLE_NAME+" set vnum="+total_num+" where id=1";

try {

db = new DBConnect();

k = db.executeUpdate(sql);

} catch (Exception e) {

// TODO: handle exception

System.out.println("com.hdzx.pub~VisitorCounter.incTotalCounter:增加访问人数");

}

return k;

}

//增加今日的访问量

public static int incTodayCounter(){

int k = 0;

DBConnect db = null;

String sql = null;

loadNum();

today_num += 1;

sql = "update "+TABLE_NAME+" set vnum="+today_num+" where vdate='"+today+"'";

try {

db = new DBConnect();

k = db.executeUpdate(sql);

if(k 0)

incTotalCounter();

} catch (Exception e) {

// TODO: handle exception

System.out.println("com.hdzx.pub~VisitorCounter.incTotalCounter:增加访问人数");

}

return k;

}

//获得今天的日期

private static String getTodayDate(){

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

return sdf.format(new Date());

}

///获得今日访问量

public static long getTodayNum(){

loadNum();

return today_num;

}

//获得总的访问量

public static long getTotalNum(){

loadNum();

return total_num;

}

}

步骤三、经过以上的步骤后，在页面中加入以下的代码，就可以实现网站访问量的统计工作：

if(session.isNew())

{

VisitorCounter.incTodayCounter();

}

%

今日访问量：%=VisitorCounter.getTodayNum() %br/

总的访问量: %=VisitorCounter.getTotalNum() %


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