统计站点访问次数（ServletContext实现）（十一）

最新推荐文章于 2025-05-17 15:53:37 发布

海边拾贝seebit

最新推荐文章于 2025-05-17 15:53:37 发布

阅读量972

点赞数

CC 4.0 BY-SA版权

分类专栏： JavaWeb

本文链接：https://blog.youkuaiyun.com/Ada_yangyang/article/details/81639813

JavaWeb 专栏收录该内容

49 篇文章

订阅专栏

本文介绍了一个简单的网站访问计数器实现方案，通过两个Servlet分别完成访问次数的记录与展示功能。采用Java Servlet技术，利用ServletContext对象来保存并更新访问次数。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

com.it.demo.VisitServlet

package com.it.demo;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 用于统计站点访问次数
 * @author xie
 *
 */
public class VisitServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//1.获取ServletContext对象
		ServletContext context = this.getServletContext();
		//2.直接取出访问次数
		Integer count = (Integer) context.getAttribute("count");
		//3.判断count是否为null，如果为null，则说明是第一次访问
		if(count == null) {
			count = 1;
		}else {
			count += 1;
		}
		//4.将count重新存储
		context.setAttribute("count", count);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

com.it.demo.ShowServlet

package com.it.demo;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 用于显示站点访问次数
 * @author xie
 *
 */
public class ShowServlet extends HttpServlet {


	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html;charset=utf-8");
		//1.得到ServletContext
		ServletContext context = this.getServletContext();
		//2.取出访问次数
		Integer count = (Integer)context.getAttribute("count");
		//3.写出到页面
		response.getWriter().write("站点被访问" + count + "次");
	}

	
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}