位置：首页-资讯-后端开发

Servlet实现统计页面访问次数功能

2024-04-02 19:55

短信预约 -IT技能 免费直播动态提醒

本文实例为大家分享了Servlet实现统计页面访问次数的具体代码，供大家参考，具体内容如下

实现思路：

1.新建一个CallServlet类继承HttpServlet，重写doGet（）和doPost（）方法；

2.在doPost方法中调用doGet（）方法，在doGet()方法中实现统计网站被访问次数的功能，用户每请求一次servlet，使得访问次数times加1；

3.获取ServletContext，通过它的功能记住上一次访问后的次数。

在web.xml中进行路由配置：


<!-- 页面访问次数 -->
  <servlet>
    <servlet-name>call</servlet-name>
    //CallServlet为处理前后端交互的后端类
    <servlet-class>CallServlet</servlet-class>  
  </servlet>
  <servlet-mapping>
    <servlet-name>call</servlet-name>
    <url-pattern>/call</url-pattern>
</servlet-mapping>

CallServlet类：


import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;



//获得网站被访问的次数
public class CallServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        ServletContext context = getServletContext();
        Integer times = (Integer) context.getAttribute("times");
        if (times == null) {
            times = new Integer(1);
        } else {
            times = new Integer(times.intValue() + 1);
        }
        PrintWriter out= resp.getWriter();
        out.println("<html><head><title>");
        out.println("页面访问统计");
        out.println("</title></head><body>");
        out.println("当前页面被访问了");
        out.println("<font color=red size=20>"+times+"</font>次");
        context.setAttribute("times",times);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doGet(req,resp);
    }
}